Flash custom ROM - OnePlus 6T Questions & Answers

Flash custom ROM - OnePlus 6T Questions & Answers

From 6T (purchased from oneplus.com), any time I follow the instructions for how to flash one of the custom ROMs, I get stuck at the bootloader with no working rom.
I was able to use the MSMTool to restore to 9.0.13. I upgraded a few times flashing OnePlus6TOxygen_34_OTA_024_all_1909112343_9fd6e0057b8747dc, which works, but when I try to flash a custom ROM, I cannot get past the bootloader. I say a few times because I've tried this for a few days now with no success.
Most recently, I used the Flash-all.bat inside 10.3.0-OnePlus6TOxygen_34_OTA_042_all_1912142031_d9ef3-FASTBOOT
I am currently on 10.3.0, with twrp-3.3.1-31-fajita-Q-mauronofrio installed using the fastboot flash boot_a twrp-3.3.1-31-fajita-Q-mauronofrio.img then fastboot boottwrp-3.3.1-31-fajita-Q-mauronofrio.img commands from fastboot.
I can then install Magisk 19.4 or 20.3, however again when I try to flash a custom ROM, I cannot get past the bootloader.
What am I doing wrong?

When you 'fastboot boot' twrp, you can't flash twrp as .img file after that..... (There is no recovery partition on our phone, only a boot one)
If you flash a twrp img it will overwrite boot partition with only twrp and no kernel... Basic knowledge. Once temporarily booted in twrp by 'fastboot boot' command you must flash the installer, meaning the .zip file.
Then reboot your phone in twrp and flash whatever you want
Always latest versions of Magisk, why flashing a deprecated 19.4?

Striatum_bdr said:
When you 'fastboot boot' twrp, you can't flash twrp as .img file after that..... (There is no recovery partition on our phone, only a boot one)
If you flash a twrp img it will overwrite boot partition with only twrp and no kernel... Basic knowledge. Once temporarily booted in twrp by 'fastboot boot' command you must flash the installer, meaning the .zip file.
Then reboot your phone in twrp and flash whatever you want
Always latest versions of Magisk, why flashing a deprecated 19.4?
Click to expand...
Click to collapse
I was having an issue with the boot command in 10.3.0, which is how I found the flash command, and using both of those seemed to work (at least get me into twrp).
Now I am able to just run fastboot boot twrp-3.3.1-31-fajita-Q-mauronofrio.img and it works.
I was using 19.4 because somewhere in here someone mention twrp not working with magisk 20.3.
I've had no issues with 20.3 and twrp, so I will continue to use 20.3
The steps I use to flash a custom ROM (after twrp is installed)
1. remove the lock screen security from the existing ROM
2. boot straight into recovery from the existing ROM
3. wipe Data, Cache, and Dalvik by swiping right to factory reset from the wipe menu
4. flash the ROM from internal storage using the Install button
at this point I've tried a couple of approaches including a reboot here to see if the ROM flashed, and also installing twrp right after flashing ROM so that I will have a working twrp install.
Either way, I can never get past the bootloader.
Am I performing these steps correctly?

s7itch3s said:
I was having an issue with the boot command in 10.3.0, which is how I found the flash command, and using both of those seemed to work (at least get me into twrp).
Now I am able to just run fastboot boot twrp-3.3.1-31-fajita-Q-mauronofrio.img and it works.
I was using 19.4 because somewhere in here someone mention twrp not working with magisk 20.3.
I've had no issues with 20.3 and twrp, so I will continue to use 20.3
The steps I use to flash a custom ROM (after twrp is installed)
1. remove the lock screen security from the existing ROM
2. boot straight into recovery from the existing ROM
3. wipe Data, Cache, and Dalvik by swiping right to factory reset from the wipe menu
4. flash the ROM from internal storage using the Install button
at this point I've tried a couple of approaches including a reboot here to see if the ROM flashed, and also installing twrp right after flashing ROM so that I will have a working twrp install.
Either way, I can never get past the bootloader.
Am I performing these steps correctly?
Click to expand...
Click to collapse
I don't know I don't flash custom ROMs anymore, too old for that stuff and need my time for me.
There are specific instructions for each custom ROM it's better to ask in dedicated threads, some of them need to have OOS in both slots before, some of them need to be fleshed in both slots. Normally you eventually wipe things, flash the ROM and twrp to keep it, then reboot to twrp (necessary to boot on the slot where the ROM is actually fleshed, which is always the non active slot, which become the new active slot) and flash Gapps and Magisk ( because Gapps and Magisk can be flashed only in active slot) then reboot system

s7itch3s said:
Am I performing these steps correctly?
Click to expand...
Click to collapse
I've updated these instructions here, they are the same, just added to them really.
This is how I install Lineage 17. (If you are doing 16, replace 10.3.0 with 9.0.17, and the Q image of TWRP with the Pie image)
- Install 10.3.0 fastboot ROM again to start over, boot it once. Just to make sure everything is good.
- Reboot to fastboot.
- Boot the Q image of TWRP.
- Run the TWRP installer, reboot to recovery
- You backed everything up right?
- Factory reset (This is the slider at the bottom in the wipe menu).
- Format data. (This is the button that says Format data in the wipe menu)
- Do NOT wipe cache, do not Wipe system, do NOT Wipe Dalvik / ART, do not add anything else, Just Factory Reset and Format Data. After doing those two Reboot to Recovery one more time. You must do this after formatting data.
- Now transfer Lineage and TWRP to your phone, Windows / Linux should see TWRP fine as a media device when plugged in.
- Install Lineage
- Run the TWRP Installer.
- Reboot to Recovery.
- Install Lineage (You need Lineage on both slots, so yes run it again)
- Run the TWRP Installer (yes again).
- Reboot to Recovery.
- Install Gapps if you want them.
- Install Magisk 20.3 if you use Magisk. I used 20.3 it works fine. (20.4 also fine) Do not install modules or other add ons at this point. Boot once and go through the setup and everything, then install your add-ons.
- Be aware the phone will restart once, then Lineage will start up and all will be good.
From that point on updating should just be like normal :
- Reboot to recovery
- Flash Lineage.
- Flash TWRP Installer
- Reboot to Recovery
- Flash Gapps. (Assuming you use them, if you installed them once you must continue to install them or do a clean install)
- Flash Magisk. (If you use it)
- Reboot to system.
- No loss of data, or anything.
- No need to flash anything twice etc.
I've posted similar instructions here. It was just for LOS 16, same thing essentially though.

Advised Sloth said:
Sir, apology for being an old noob, I am on OOS 10.3.2 TWRP 3.3.1-32 can I follow the above guide? If Yes,
Why aren't we using the "Lineage Recovery" provided in "Lineage OS Downloads" page?? If we use it, will the above instructions change ? What are the cons of using it?
Sorry again for asking!! Can you please share me the Link to Open Gapps which Will be suitable in my scenario ?
Click to expand...
Click to collapse
Historically Lineage / CM recovery was hit or miss, or TWRP or other recoverys worked better. To be fair I haven't even tried the Lineage recovery. So maybe that is no longer true? Right now, I know TWRP works. The updated instructions link up there has links in it, FYI, link OpenGapps. OpenGapps can be found here. You will be using Arm64, Android 10 obviously.
Since you are already on 10.3.2 (I assume you were on 10.3.1 before) you should be good to skip the step about fastboot ROM or install OOS, and you already have TWRP., so you should be able to go right on to backing everything up, wiping everything, and installing Lineage. (So you can skip the first few steps)
Anymore questions feel free to ask.

OhioYJ said:
Historically Lineage / CM recovery was hit or miss, or TWRP or other recoverys worked better. To be fair I haven't even tried the Lineage recovery. So maybe that is no longer true? Right now, I know TWRP works. The updated instructions link up there has links in it, FYI, link OpenGapps. OpenGapps can be found here. You will be using Arm64, Android 10 obviously.
Since you are already on 10.3.2 (I assume you were on 10.3.1 before) you should be good to skip the step about fastboot ROM or install OOS, and you already have TWRP., so you should be able to go right on to backing everything up, wiping everything, and installing Lineage. (So you can skip the first few steps)
Anymore questions feel free to ask.
Click to expand...
Click to collapse
First of all, thank you very much for your time and explanation.
Sir, so i will proceed as follows:
* Boot into TWRP Recovery
* Perform "swipe to factory reset" & "swipe to wipe data"
* Reboot to TWRP recovery again
* Flash LOS 17.1 on slot A
* Reboot to TWRP recovery again
* Flash LOS 17.1 on slot B
* Reboot to system
Sir, please check are my steps correct? If not,
From which step( steps mentioned in your guide) should i start?
Last query is, which GApps zip will be best for me, micro/nano/pico/tv stock, If i want max coverage of google?
Very sorry for knocking you repeatedly!!!

Advised Sloth said:
First of all, thank you very much for your time and explanation.
Last query is, which GApps zip will be best for me, micro/nano/pico/tv stock, If i want max coverage of google?
Click to expand...
Click to collapse
Your starting point is correct. However make sure you don't miss the re-install TWRP after flashing Lineage each time, and the second time you need to flash Gapps before you reboot to system.
Personally I always do Nano. Anything else you need (that would be included in Micro) can be installed from the Play store. Nano at least includes all the things that can't be installed from the play store.
Pico has the least in it. TV is for TV devices. On OpenGapps there is a box next to each package you can click and it will tell you exactly what is in each package.

OhioYJ said:
I've updated these instructions here, they are the same, just added to them really.
This is how I install Lineage 17. (If you are doing 16, replace 10.3.0 with 9.0.17, and the Q image of TWRP with the Pie image)
- Install 10.3.0 fastboot ROM again to start over, boot it once. Just to make sure everything is good.
- Reboot to fastboot.
- Boot the Q image of TWRP.
- Run the TWRP installer, reboot to recovery
- You backed everything up right?
- Factory reset (This is the slider at the bottom in the wipe menu).
- Format data. (This is the button that says Format data in the wipe menu)
- Do NOT wipe cache, do not Wipe system, do NOT Wipe Dalvik / ART, do not add anything else, Just Factory Reset and Format Data. After doing those two Reboot to Recovery one more time. You must do this after formatting data.
- Now transfer Lineage and TWRP to your phone, Windows / Linux should see TWRP fine as a media device when plugged in.
- Install Lineage
- Run the TWRP Installer.
- Reboot to Recovery.
- Install Lineage (You need Lineage on both slots, so yes run it again)
- Run the TWRP Installer (yes again).
- Reboot to Recovery.
- Install Gapps if you want them.
- Install Magisk 20.3 if you use Magisk. I used 20.3 it works fine. (20.4 also fine) Do not install modules or other add ons at this point. Boot once and go through the setup and everything, then install your add-ons.
- Be aware the phone will restart once, then Lineage will start up and all will be good.
From that point on updating should just be like normal :
- Reboot to recovery
- Flash Lineage.
- Flash TWRP Installer
- Reboot to Recovery
- Flash Gapps. (Assuming you use them, if you installed them once you must continue to install them or do a clean install)
- Flash Magisk. (If you use it)
- Reboot to system.
- No loss of data, or anything.
- No need to flash anything twice etc.
I've posted similar instructions here. It was just for LOS 16, same thing essentially though.
Click to expand...
Click to collapse
Sorry for the necropost, but this also works for TWRP 3.6 and Lineage 18.1. I initially had a problem with the default TWRP for my 6t. During the initial TWRP fastboot the version on their site caused a firmware error which I could just barely get out of, but it screwed up the system boot process in some subtle way that even the fixed version of TWRP (found on this site) couldn't solve.
After trying your instructions above, it didn't work the first time because of the screwed up system boot. It just kept trying to boot to recovery. I suspected a firmware error and was almost going to do an mcmdownload soft-brick rescue. I tried one last thing, using the TWRP on the system to sideload the stock ROM. That worked and patched up the system boot process. Once I booted and ran through some basic initialization to make sure developer options were properly set I followed the above instructions and it worked nearly flawlessly.
One strange thing. After I installed Lineage 18.1 and TWRP to both partitions (as well as Gapps / magisk), it rebooted to system and almost booted without incident -- except a large circular logo popped up that said 100% and stopped. I figured that that meant someting completed properly, so I powered off, waited 10 seconds, powered on and then the Lineage green system initialization spinner came up for a few minutes and it went through the user initialization sequence.
Thanks. I almost gave up and bought a new phone.

OhioYJ said:
I've updated these instructions here, they are the same, just added to them really.
This is how I install Lineage 17. (If you are doing 16, replace 10.3.0 with 9.0.17, and the Q image of TWRP with the Pie image)
- Install 10.3.0 fastboot ROM again to start over, boot it once. Just to make sure everything is good.
- Reboot to fastboot.
- Boot the Q image of TWRP.
- Run the TWRP installer, reboot to recovery
- You backed everything up right?
- Factory reset (This is the slider at the bottom in the wipe menu).
- Format data. (This is the button that says Format data in the wipe menu)
- Do NOT wipe cache, do not Wipe system, do NOT Wipe Dalvik / ART, do not add anything else, Just Factory Reset and Format Data. After doing those two Reboot to Recovery one more time. You must do this after formatting data.
- Now transfer Lineage and TWRP to your phone, Windows / Linux should see TWRP fine as a media device when plugged in.
- Install Lineage
- Run the TWRP Installer.
- Reboot to Recovery.
- Install Lineage (You need Lineage on both slots, so yes run it again)
- Run the TWRP Installer (yes again).
- Reboot to Recovery.
- Install Gapps if you want them.
- Install Magisk 20.3 if you use Magisk. I used 20.3 it works fine. (20.4 also fine) Do not install modules or other add ons at this point. Boot once and go through the setup and everything, then install your add-ons.
- Be aware the phone will restart once, then Lineage will start up and all will be good.
From that point on updating should just be like normal :
- Reboot to recovery
- Flash Lineage.
- Flash TWRP Installer
- Reboot to Recovery
- Flash Gapps. (Assuming you use them, if you installed them once you must continue to install them or do a clean install)
- Flash Magisk. (If you use it)
- Reboot to system.
- No loss of data, or anything.
- No need to flash anything twice etc.
I've posted similar instructions here. It was just for LOS 16, same thing essentially though.
Click to expand...
Click to collapse
OhioYJ, these are great instructions but it initially left me with questions about how that procedures would create duplicate installs on slot A and B. The answer is of course that the Lineage installer for the 6t knows about the dual slot setup and always writes to the inactive slot. Booting into recovery activates the inactive slot so that installing again after that installs to the other slot and now you have Lineage on both slots. The installer for TWRP always installs to both slots and is needed because Lineage always installs its recovery handler and you don't want that so you overwrite.
PS: TWRP has an option for installing itself after installing the requested package. Would that be just as good as installing the TWRP zip?
PPS: I had to do an 'adb push' of the Lineage and TWRP zips to sdcard for the installs. Unfortunately installing and slot switching makes the sdcard unavailable so you have to push the zips again. Is there somewhere I can write them to that I don't lose access to after a boot to recovery?

Related

Instructions installing Lineage

Hello,
this is my first time installing a custom ROM, so a want to ask if I can use the original lineage instructions from their website for installing the https://forum.xda-developers.com/oneplus-6t/development/rom-lineageos-16-0-t3897334 ROM on my new 6T.
Do I have to take care of something special, are there differences in the installing process?
Better asking before then......
Thanks!

I haven't tried Lineage OS. I believe it is based on AOSP. I am currently running HavocOS which is also based on AOSP. Practically all custom ROMs I have tried have required ensuring a stable version of OOS has been flashed to both slots before installing the custom ROM and then GApps. I would recommend reading a thread from a few custom ROMs to familiarise yourself with the process as I believe it should be the some process for most. I would also recommend backing up your internal storage beforehand as there may be a chance that you'll need to format your internal storage to get around encryption issues. In some cases I have had the phone reboot back into TWRP constantly if the storage wasn't wiped first.

Due to the differences in encryption, here is the way I always install AOSP when bouncing back and forth between OOS and AOSP. I haven't tried not formatting data in a while, so it may work without these days, but it didn't use to.
- Backup everything to the PC, so you will need to copy all your data over.
- Sync all your accounts, etc.
- In TWRP format data. Reboot recovery
- Factory Reset.
- Flash Lineage
- Flash TWRP Installer
- Reboot to Recovery
- Flash Lineage (This is only the first time, to get the AOSP rom on both slots, only do this for the first install)
- Flash TWRP Installer (This is only the first time, to get the AOSP rom on both slots, only do this for the first install)
- Reboot to Recovery (This is only the first time, to get the AOSP rom on both slots, only do this for the first install)
- Flash Gapps
- Flash Magisk
- Reboot to System.
- Then you should be able to setup the device, copy everything back over. Restore your data.
After this you should be able to update Lineage as normal.
- Reboot to recovery
- Flash Lineage.
- Flash TWRP Installer
- Reboot to Recovery
- Flash Gapps.
- Flash Magisk.
- Reboot to system.
- No loss of data, or anything.

OhioYJ said:
Due to the differences in encryption, here is the way I always install AOSP when bouncing back and forth between OOS and AOSP. I haven't tried not formatting data in a while, so it may work without these days, but it didn't use to.
- Backup everything to the PC, so you will need to copy all your data over.
- Sync all your accounts, etc.
- In TWRP format data. Reboot recovery
- Factory Reset.
- Flash Lineage
- Flash TWRP Installer
- Reboot to Recovery
- Flash Lineage (This is only the first time, to get the AOSP rom on both slots, for updates, only do this for the first install)
- Flash TWRP Installer (This is only the first time, to get the AOSP rom on both slots, for updates, only do this for the first install)
- Reboot to Recovery (This is only the first time, to get the AOSP rom on both slots, for updates, only do this for the first install)
- Flash Gapps
- Flash Magisk
- Reboot to System.
- Then you should be able to setup the device, copy everything back over. Restore your data.
After this you should be able to update Lineage as normal.
- Reboot to recovery
- Flash Lineage.
- Flash TWRP Installer
- Reboot to Recovery
- Flash Gapps.
- Flash Magisk.
- Reboot to system.
- No loss of data, or anything.
Click to expand...
Click to collapse
Thank you for your answer, everthing worked fine for me installing Lineage, I did it exact the way you posted.
This double flash confused me at the beginning but as you described you have to do it just once.
So, thanks a lot and sorry for my late answer.

KKF32 said:
Thank you for your answer, everthing worked fine for me installing Lineage, I did it exact the way you posted.
This double flash confused me at the beginning but as you described you have to do it just once.
So, thanks a lot and sorry for my late answer.
Click to expand...
Click to collapse
Glad it worked out for you. The A/B slots are new to a lot of people still. The biggest thing to remember is when you flash a ROM you are flashing to the opposite slot. So if you are on Slot A and you flash a ROM, you are flashing Slot B. When you reboot to recovery it will switch to Slot B so you can install Gapps, Magisk, etc. to Slot B where your new ROM is installed. (Gapps, Magisk etc, flash to the current slot, not the opposite slot. )

Need some help - Strange OP6T storage issues after flash

Hello, I have a T-Mobile 6T which thanks to the XDA thread about bypassing T-mobile, is running the international firmware so I didn't have to kiss their butt trying to unlock the bootloader. Yesterday I decided to try the Resurrection Remix rom since it is unclear whether the Lineage 16 rom supports the in-display fingerprint reader, and I am too busy at work and too lazy to read the entire thread to see if it does.
I followed the instructions and updated my OxyOS to the latest .15 release via TWRP which I also updated to the latest version via OTG using a USB drive because I was unable to unencrypt using the older Blu-Spark TWRP version I had installed. After the OxyOS update (on both partitions) I flashed TWRP again, rebooted to recovery and installed Pico Gapps.
I found the Resurrection Remix rom to be very buggy and I hate the way the in-display biometric works (very slow and I don't like the paw print used as fingerprint placement). Anyway I started installing apps and after 4 apps installed, it says there is no space left in storage.
Nothing will update, and when I try to check storage with any file explorer it says "access denied" or just won't load. I've tried everything. Wiped the data and did factory reset, then flashed stock rom again and same issue. What am I doing wrong?

That looks like a messed up flash. And is pretty common. Considering that A/B is still new and everyone has his own method of flashing. So assuming you can make it back to latest Stock OOS (9.0.15 right now). If you dunno how to then simple reboot to recovery, flash OOS ZIP and then TWRP. Again Reboot to Recovery from within TWRP (Reboot -> Recovery) and again flash OOS ZIP and TWRP Installer. For TWRP I recommend you to grab the latest one (3.3.1-6 as of now). Once flashed, Format Data (Wipe -> Format Data -> YES) and Reboot. Wait for it to boot up. Now you should be on Stable Stock OOS with TWRP Installed.
Now Download ROM of your Choice (RR, LOS, Bootleggers, whatever). You will also need the latest TWRP Installer (same as above) and Gapps (Nano/ Stock Recommended) and Magisk if you want to Root. Reboot to Recovery, flash ROM ZIP and TWRP Installer ZIP. Wait for it to Finish. Reboot to Recovery. Once in TWRP, again flash ROM and TWRP Installer. Once done, again. Reboot to Recovery from Within TWRP. (Read above on how to). Now, flash Gapps. Magisk if you want to Root. Once done, again do a Format Data. Reboot and be patient for ROM to boot. And then tell me wether this works or Not. Good Luck.

Bootlooped after install of Lineage, twice!

Hey all,
Phone is new to me, t-mo version. Did the international conversion, unlocked the bootloader, installed TWRP 3.3.1.1.img. All with minimal issues. Installed the 20200121 nightly of LOS successfully, but it powered off a few minutes after getting through the setup menu. Bootlooped. I may have gotten it out of the bootloop with the vol up+down trick from the msmdownloadtool trick, or something, cause I got the screen to turn off and left it for the night.
Tonight, the phone was totally dead, but I was able to start over with the (patched) msmtool I used initially. All good. Went through the same steps and got TWRP and LOS installed. This time I used last nights nightly 20200123. All set for a minute, before it bootlooped again.
Here's some details that might be useful:
The phone powered off after unplugging it. This is when the bootloop started, I can't be sure it was after dissconnecting each time, but at least the last time. The battery was >80%. I also managed to get it to boot into LOS after the most recent bootloop, for a few minutes, and it powered off without being connected or disconnected. So probably not related.
I did a system wipe, along with the format, as recommended in the LOS installation steps from them
The system wipe maybe wasn't a good idea??
I tried to sideload LOS.zip, which seemed to work fine according to my terminal, but it warned me that I had no OS installed when I went to reboot. So I adb pushed LOS and installed. I got the same no OS warning, but rebooted anyway this time. LOS started up fine, for a few minutes, before powering off and then looping.
Could I have 2 instances conflicting??
Nothing else installed yet, not root, magisk, or anything yet.
I shut it down this time with a vol up + power, which worked. I'm done for tonight, but I would appreciate any ideas on what may be causing this so I can give it a third go tomorrow.
Thanks!

try this
BeansBeanson said:
Hey all,
Phone is new to me, t-mo version. Did the international conversion, unlocked the bootloader, installed TWRP 3.3.1.1.img. All with minimal issues. Installed the 20200121 nightly of LOS successfully, but it powered off a few minutes after getting through the setup menu. Bootlooped. I may have gotten it out of the bootloop with the vol up+down trick from the msmdownloadtool trick, or something, cause I got the screen to turn off and left it for the night.
Tonight, the phone was totally dead, but I was able to start over with the (patched) msmtool I used initially. All good. Went through the same steps and got TWRP and LOS installed. This time I used last nights nightly 20200123. All set for a minute, before it bootlooped again.
Here's some details that might be useful:
The phone powered off after unplugging it. This is when the bootloop started, I can't be sure it was after dissconnecting each time, but at least the last time. The battery was >80%. I also managed to get it to boot into LOS after the most recent bootloop, for a few minutes, and it powered off without being connected or disconnected. So probably not related.
I did a system wipe, along with the format, as recommended in the LOS installation steps from them
The system wipe maybe wasn't a good idea??
I tried to sideload LOS.zip, which seemed to work fine according to my terminal, but it warned me that I had no OS installed when I went to reboot. So I adb pushed LOS and installed. I got the same no OS warning, but rebooted anyway this time. LOS started up fine, for a few minutes, before powering off and then looping.
Could I have 2 instances conflicting??
Nothing else installed yet, not root, magisk, or anything yet.
I shut it down this time with a vol up + power, which worked. I'm done for tonight, but I would appreciate any ideas on what may be causing this so I can give it a third go tomorrow.
Thanks!
Click to expand...
Click to collapse
(BASE STOCK ROM)
OnePlus6TOxygen_41_OTA_063_all_2001032024_215eea3f e7c64e37.zip (BETA4)
whatever the rom requires(10.3.0) however the Q beta 4 works just fine, havent found any real bugs / newer security patches etc.
(CUSTOM ROM)
Latest rom that will work with BASE and TWRP decryption
(latest TWRP )
twrp 3.3.1-31 zip
(Latest)
Magisk Canary . Zip
(Latest)
open_gapps - Q
(Latest)
custom compatible kernel
(Latest)
NanoDroid - with con/fig read alter installation notes
(&)
India_Fake_Partition_Deleter
------------------- EASY-CLEAN-INSTALL (LONG BUT BULLETPROOF) -------------------
!(BACK UP STORAGE / U WILL LOSE DATA ETC.
ALL FILES ABOVE CAN BE SUBSTITUTED FOR ANY "IDEAL" ROM SETUP
CONFIGURATIONS YOU MAY PREFER., THESE ARE MYNE)!
------------------------------------------------------------------------------------------------
You only need any custom rom with the required BASE STOCK ROM and compatible TWRP version to decrypt storage, and of course, the latest magisk.
------------------------------------------------------------------------------------------------
From dirty or clean system - to - clean flash
in cmd type
fastboot boot twrp.img
Install twrp installer.
Mount all partitions / wipe / advanced / check all boxes & wipe all / format.
- - Reboot twrp - -
Mount all partitions / wipe / advanced / check all boxes & wipe all / format.
Reboot twrp
(DONT BE MOUNTING OR UNMOUNTING ANYTHING MANUALY ANYMORE!)
install OOS(BETA4).zip / TWRP installer
- - reboot recovery - -
install OOS(BETA4).zip / TWRP installer
- - reboot to recovery - -
Copy -
Magisk , TWRP & ROM to internal storage.
Format Data
Flash ROM
Flash TWRP installer
Reboot to recovery
Wipe Dalvik/ART Cache
Wipe Data
Flash Magisk.
Reboot system with your device unplugged to be safe (Device may reboot a couple times)
- - reboot to recovery - -
Copy -
Magisk , TWRP & ROM to internal storage.
Flash ROM
Flash TWRP installer
- - reboot to recovery - -
Flash Magisk
BOOT UP System
- - reboot back to recovery - -
Choose Reboot Option / (CHANGE YOUR SLOT) / Back / Reboot Recovery
Flash Magisk.
Reboot system
SETUP ROM
/////////////////////////////////////\OPTIONAL/\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
- - REBOOT TO RECOVERY - -
----------------------------------------------------------------------------------------------------
STEP *( .=./ )*
Flash GAPPS
Flash India_Fake_Partition_Deleter
Flash NanoDroid (With prefered pre-configured setup/overlay/apps files placed)
Flash Custom Kernel
Re-Flash Magisk again
Click - WIPE DALVIK & Reboot system right after
------------------------------------------------------------------------------------------------------
- - REBOOT TO RECOVERY - -
Choose Reboot (CHANGE YOUR SLOT TO THE OPPOSITE SLOT)
- - REBOOT BACK TO RECOVERY - -
REPEAT STEP " *( .=./ )* "
-------------------------------------------------------------------------------------------------
GAME OVER
1up
THIS is EXTENSIVE but will work for any particular rom setup for a/b devices based on Q
---------- Post added at 10:50 PM ---------- Previous post was at 10:47 PM ----------
just follow install guide download latest linageos and gapps from open gapps. and latest magisk and after flash gapps if you cannot sign into a google account then you need to factory reset both slot in system settings menu and then just reinstall magisk and kernel settings modules etc
---------- Post added at 10:52 PM ---------- Previous post was at 10:50 PM ----------
just switch slots in cmd or via twrp and reboot system and factory reset wipe all via the settings in the booted system, not twrp

I'm a little slow..
I got the phone back to factory with the msmtool, so I'm ready to do this! I get the general idea, but for a few of these, can you ELI5. Thanks so much for taking the time to help me out.
------------------- EASY-CLEAN-INSTALL (LONG BUT BULLETPROOF) -------------------
!(BACK UP STORAGE / U WILL LOSE DATA ETC.
ALL FILES ABOVE CAN BE SUBSTITUTED FOR ANY "IDEAL" ROM SETUP
CONFIGURATIONS YOU MAY PREFER., THESE ARE MYNE)!
------------------------------------------------------------------------------------------------
You only need any custom rom with the required BASE STOCK ROM and compatible TWRP version to decrypt storage, and of course, the latest magisk.
------------------------------------------------------------------------------------------------
From dirty or clean system - to - clean flash
in cmd type
fastboot boot twrp.img
Install twrp installer. Do I just find the zip in the file structure in twrp and install? I'm at this step in twrp and I don't see how to install it. Previously I had `adb push twrp.img /storage/` so that I had a file I could find and install. If it's already there just from `fastboot boot twrp.img`, I can't seem to find it.
--solved this by pushing the twrp-intaller.zip to /storage, and then installing. It did the expected installation to both a/b
Mount all partitions / wipe / advanced / check all boxes & wipe all / format.
- - Reboot twrp - -
I went to `mount` and checked all the boxes. Then went back to `wipe advanced` and checked all those boxes. Now I'm stuck at the fastboot screen and can't boot or start. :crying:
I can't do a `fastboot boot twrp.img either. Any suggestions before I blow it away with the msmtool again??????
Mount all partitions / wipe / advanced / check all boxes & wipe all / format.
Reboot twrp
(DONT BE MOUNTING OR UNMOUNTING ANYTHING MANUALY ANYMORE!) How was I doing it wrong? Or do you mean that these steps just now are the only mounting that should be done?
install OOS(BETA4).zip / TWRP installer What command should I use to move it from my pc to the phone? `adb push .zip storage` ?
- - reboot recovery - -
install OOS(BETA4).zip / TWRP installer Do it twice, exactly the same? Is this so it's on both slots?
- - reboot to recovery - -
Copy -
Magisk , TWRP & ROM to internal storage. What command should I use for copying? Like above `adb push <files> storage`?
Format Data
Flash ROM
Flash TWRP installer
Reboot to recovery
Wipe Dalvik/ART Cache
Wipe Data
Flash Magisk.
Reboot system with your device unplugged to be safe (Device may reboot a couple times)
- - reboot to recovery - -
Copy -
Magisk , TWRP & ROM to internal storage.
Flash ROM
[/COLOR]just follow install guide download latest linageos and gapps from open gapps. and latest magisk and after flash gapps if you cannot sign into a google account then you need to factory reset both slot in system settings menu and then just reinstall magisk and kernel settings modules etc
---------- Post added at 10:52 PM ---------- Previous post was at 10:50 PM ----------
just switch slots in cmd or via twrp and reboot system and factory reset wipe all via the settings in the booted system, not twrp
Not sure what you mean by this part here. I wasn't planning on installing gapps. I'm confused about the reseting both slots. Is the idea that I did the install twice above, so that it's on both a/b slots and I'd have to reset both if there's a problem?
Click to expand...
Click to collapse

How to install ANY CustomROM on OnePlus6T from OOS/CustomROM

So, I searched the internet for a method to flash a CustomROM on the OnePlus 6T. But somehow none of them worked, so I worked on one myself that at least works for me.
There are 2 methods, use Method A if you don't have a custom ROM installed and still use OxygenOS. Use Method B if you are using a custom ROM and want to have another one:
Method A: From OxygenOS to CustomROM
1. boot in twrp
2. in twrp, do a factory reset
3. flash latest oos zip(flashable ota, link will be below)
4. flash twrp installer zip(i recommend mauronofrio´s twrp, link wil be below)
5. check current slot, then reboot in twrp
6. check if slot changed, then do a factory reset
7. flash latest oos zip
8. flash twrp installer zip
9. reboot recovery, and check if slot changed
10. factory reset
11. flash custom rom zip
12. flash twrp installer zip
13. reboot twrp(check current slot)
14. check if slot changed(if yes:it worked, if no:repeat)
15. additional: flash magisk&gapps
then,your rom is ready to use
Method B: From Custom ROM to another Custom ROM
1. reboot to twrp
2. in twrp, do a factory reset
3. then select advanced wipe: wipe system,cache,data. DON’T WIPE VENDOR
4. flash custom rom zip
5. flash twrp installer zip
6. check which slot you´re in
7. reboot twrp
8. if slot changed, everything worked
9. flash gapps and magisk if you want
then, your rom is ready to use
So, I hope I have spared you many problems and wish you much fun with your Devices.
Links:
Mauronofrio TWRP: click here
OxygenOS Stable OTA 10.3.1: click here

DirtryElectro said:
So, I searched the internet for a method to flash a CustomROM on the OnePlus 6T. But somehow none of them worked, so I worked on one myself that at least works for me.
.......
Links:
Mauronofrio TWRP: click here
OxygenOS Stable OTA 10.3.1: click here
Very important note: Download the FULL OTA, not the local-upgrade OTA!
Click to expand...
Click to collapse
Some of those steps are unnecessary. Like doing a Factory Reset each time you boot to TWRP as that will mess up your Encryption. And in Method B, you mention to Wipe System. DO NOT UNDER ANY CIRCUMSTANCES WIPE SYSTEM ON THE 6T. IT WILL MESS UP YOUR DEVICE. This is the method I use to flash ROMs.
1. Boot to TWRP
2. Flash the latest version of Stable OOS for your Device and latest TWRP Installer for your Device. -> Reboot to Recovery.
3. Flash the latest version of Stable OOS for your Device and latest TWRP Installer for your Device. -> Reboot to Recovery.
4. Flash ROM + TWRP ,Format Data (Go to Wipe, in the lower right corner Format Data, type in 'YES' and hit Enter) -> Reboot to System
5. After first Boot, You can Reboot to Recovery & Flash Magisk (Optional).
These are for EvolutionX that has Gapps built-in so you don't need to flash Gapps. Otherwise you can Skip the Format Data after ROM flash in Step 4, Reboot to Recovery, Flash Gapps and then Format Data. I use these and they have worked flawlessly for me. Also when switching from one AOSP based ROM to another, it's generally recommended to flash OOS Before.

DarthVader said:
Some of those steps are unnecessary. Like doing a Factory Reset each time you boot to TWRP as that will mess up your Encryption. And in Method B, you mention to Wipe System. DO NOT UNDER ANY CIRCUMSTANCES WIPE SYSTEM ON THE 6T. IT WILL MESS UP YOUR DEVICE. This is the method I use to flash ROMs.
1. Boot to TWRP
2. Flash the latest version of Stable OOS for your Device and latest TWRP Installer for your Device. -> Reboot to Recovery.
3. Flash the latest version of Stable OOS for your Device and latest TWRP Installer for your Device. -> Reboot to Recovery.
4. Flash ROM + TWRP ,Format Data (Go to Wipe, in the lower right corner Format Data, type in 'YES' and hit Enter) -> Reboot to System
5. After first Boot, You can Reboot to Recovery & Flash Magisk (Optional).
These are for EvolutionX that has Gapps built-in so you don't need to flash Gapps. Otherwise you can Skip the Format Data after ROM flash in Step 4, Reboot to Recovery, Flash Gapps and then Format Data. I use these and they have worked flawlessly for me. Also when switching from one AOSP based ROM to another, it's generally recommended to flash OOS Before.
Click to expand...
Click to collapse
these are just the steps which worked for me, but ok

DarthVader said:
Some of those steps are unnecessary. Like doing a Factory Reset each time you boot to TWRP as that will mess up your Encryption. And in Method B, you mention to Wipe System. DO NOT UNDER ANY CIRCUMSTANCES WIPE SYSTEM ON THE 6T. IT WILL MESS UP YOUR DEVICE. This is the method I use to flash ROMs.
1. Boot to TWRP
2. Flash the latest version of Stable OOS for your Device and latest TWRP Installer for your Device. -> Reboot to Recovery.
3. Flash the latest version of Stable OOS for your Device and latest TWRP Installer for your Device. -> Reboot to Recovery.
4. Flash ROM + TWRP ,Format Data (Go to Wipe, in the lower right corner Format Data, type in 'YES' and hit Enter) -> Reboot to System
5. After first Boot, You can Reboot to Recovery & Flash Magisk (Optional).
These are for EvolutionX that has Gapps built-in so you don't need to flash Gapps. Otherwise you can Skip the Format Data after ROM flash in Step 4, Reboot to Recovery, Flash Gapps and then Format Data. I use these and they have worked flawlessly for me. Also when switching from one AOSP based ROM to another, it's generally recommended to flash OOS Before.
Click to expand...
Click to collapse
this helped me greatly! following the instructions above had my files corrupt when id factory reset. i dont have an otg usb. so the instructions above kind of troubled me. again, thank you!

Beefybeardedbear said:
this helped me greatly! following the instructions above from OP had my files corrupt when id factory reset. i dont have an otg usb. so the instructions from OP kind of troubled me. again, thank you!
Click to expand...
Click to collapse

Questions about upgrading Lineage OS 16 to 17

Hello,
I do have some questions about upgrading LOS from 16 to 17, maybe someone can help me bringing a little light into this upgrading process.
- Is the sideload way the correct way to do this? ( https:// wiki.lineageos.org /devices /fajita /upgrade)
- What´s about the play services, I dont have any installed ( ..."If you did not have Google Apps installed, you must wipe the Data partition (or perform a factory reset) to install them"...) So if later on I want to install e.g. opengapps I have to wipe all my data after upgrading to 17??? (How? TWRP - wipe -advanced wipe - data and cache ???)
and what´s with all may data? I have titanium backup pro (no SD card), so I backup may phone, put it to my PC, upgrade to 17, wipe all data, put the backup back to phone and reboot?
Or do I have to install Magisk.zip and titanium.zip from within TWRP again first
- What do I do if the sideload fails?
- Can I do the upgrad process with TWRP too? (copying and installing from within TWRP?)
- And what about with the A/B slots, no installing twice on both slots?
As you see, I am unsure on how to do things right and I only did this once before as I installed Lineage OS.
(This would be the way I would do this:
- backup all data to PC
- Boot into TWRP
- copy LOS17.zip. Magisk.zip and Titaniumbackup-pro.zip into internal storage
- install LOS17 and boot into TWRP
- wipe data and cache
- install magisk and TB
- copy all data back and restore? (only user data or the system data too??))
Maybe someone can help me with this. Thanks!

My guide for installing Lineage maybe helpful: Guide Installing Lineage
I would recommend a clean install. Most that have tried to follow that wiki have had issues (if you look in the LOS thread). I haven't used. TB zip, but I did use my TB data from the app without issues. If you dont use Gapps, just dont install them. Skip that step. You still have to reboot to recovery to install Magisk though. I dont think I would try a TB zip until after the first boot.
Installing twice is for the intial install to get the same thing on both slots. You dont want Android 9 on one slot and Android 10 on another, or LOS 17 on one and OOS on another. Once you have LOS 17 on both slots and go to update you will just flash once. See my guide about doing an update.

Thank you for your reply,
so if I got your answer right, I should install the LOS17 like the LOS16 before, as a clean,fresh install.
Seems reasonable to me
I will do the same steps as you gave me before https://forum.xda-developers.com/oneplus-6t/help/instructions-installing-lineage-t3949628
- Backup everything to the PC, so you will need to copy all your data over.
- Sync all your accounts, etc.
- In TWRP format data. Reboot recovery
- Factory Reset.
- Flash Lineage
- Flash TWRP Installer
- Reboot to Recovery
- Flash Lineage (This is only the first time, to get the *** rom on both slots, only do this for the first install)
- Flash TWRP Installer (This is only the first time, to get the *** rom on both slots, only do this for the first install)
- Reboot to Recovery (This is only the first time, to get the *** rom on both slots, only do this for the first install)
- Flash Gapps
- Flash Magisk
- Reboot to System.
- Then you should be able to setup the device, copy everything back over. Restore your data.
Will do the flash on weekend, then I will let you know....
Thanks.

KKF32 said:
Thank you for your reply,
so if I got your answer right, I should install the LOS17 like the LOS16 before, as a clean,fresh install.
Seems reasonable to me
I will do the same steps as you gave me before https://forum.xda-developers.com/oneplus-6t/help/instructions-installing-lineage-t3949628
- Backup everything to the PC, so you will need to copy all your data over.
- Sync all your accounts, etc.
- In TWRP format data. Reboot recovery
- Factory Reset.
- Flash Lineage
- Flash TWRP Installer
- Reboot to Recovery
- Flash Lineage (This is only the first time, to get the *** rom on both slots, only do this for the first install)
- Flash TWRP Installer (This is only the first time, to get the *** rom on both slots, only do this for the first install)
- Reboot to Recovery (This is only the first time, to get the *** rom on both slots, only do this for the first install)
- Flash Gapps
- Flash Magisk
- Reboot to System.
- Then you should be able to setup the device, copy everything back over. Restore your data.
Will do the flash on weekend, then I will let you know....
Thanks.
Click to expand...
Click to collapse
How did it go?

badpanda said:
How did it go?
Click to expand...
Click to collapse
To put it short: a disaster
What I did:
- Flash Lineage
- Flash TWRP Installer
- Reboot to Recovery
- Flash Lineage
- Flash TWRP Installer
- Reboot to Recovery
- Flash Magisk
- Flash TB
- Reboot to System.
What I got was a "Qualcom Crashdump Mode" kind of report
What I used: lineage-17.1-20200418-nightly-fajita-signed / twrp-installer-3.3.1-1-fajita / Magisk-v20.4
So I thought maybe the "no factory reset" at the beginning may caused this problem, so I started the whole flashing again.
Long story short: Being distracted I once forgt to flash TWRP after the LOS and now I am stuck in fastboot.
Cant get anymore into TWRP, "fastboot boot TWRP.img" always throws me into fastboot forever wait
Tried to flash TWRP direct from fastboot "fastboot flash recovery twrp.img", always get a write error.
So, at the moment all I can get in is the bootloader, and I have no clou how to get TWRP up and running again.
Edit: Managed to get into TWRP again, but this double flash + Magisk always gives me this "Qualcomm Crashdump Mode"
Help would very much appreciated!

KKF32 said:
To put it short: a disaster
What I did:
- Flash Lineage
- Flash TWRP Installer
- Reboot to Recovery
- Flash Lineage
- Flash TWRP Installer
- Reboot to Recovery
- Flash Magisk
- Flash TB
- Reboot to System.
What I got was a "Qualcom Crashdump Mode" kind of report
What I used: lineage-17.1-20200418-nightly-fajita-signed / twrp-installer-3.3.1-1-fajita / Magisk-v20.4
Click to expand...
Click to collapse
So you tried to go straight to LOS 17, used an old version of TWRP, and never wiped data while going between Android 9 and 10? None of that will work. I think didn't make it clear, you need you need to be on the OOS 10 firmware first. Flash OOS 10 to both slots, at this point using the fastboot ROM would be my suggestion, like my [Guide]Installing Lineage.
Once you have Android 10 in place one both slots, then start your OS 17 install. Note there is a cliff notes version of that guide in the second post, if you don't want all the "wordy" details.

Oh my, I really didn´t understood the step with "get OOS10 on both slots first"
I am often a little sloppy with details, bad habit, will take some time tomorrow and do the reading and the flashing then.
Thanks again.

KKF32 said:
Oh my, I really didn´t understood the step with "get OOS10 on both slots first"
I am often a little sloppy with details, bad habit, will take some time tomorrow and do the reading and the flashing then.
Thanks again.
Click to expand...
Click to collapse
Make sure you use the"unofficial" version of TWRP, linked to in that guide, rather than the outdated official one you used before as well.

OhioYJ said:
Make sure you use the"unofficial" version of TWRP, linked to in that guide, rather than the outdated official one you used before as well.
Click to expand...
Click to collapse
So, LOS17 is up and running, I did it the long way but good to know the fastboot Rom method now. I confess some part of this thread would not have been necessary if had read your installations instruction carefully....
So let me thank you for patience und help, "Reading broadens the mind", I often tell others, will remind myself nexttime

Database Users

welcome