Can't install custom roms, security error problem. - G2 Q&A, Help & Troubleshooting

Hi, I have LG G2 F320S. I have a problem which does not let me flash custom roms via twrp because of security error i get. Im back to stock lollipop now,but i want to install custom rom. I think the real problem is with my twrp, I installed it via autorec and I think that's the issue. I don't even need to try to install custom rom, I install twrp via autorec,then turn my phone to recovery mode and I try to boot my phone again and it says security error,then I flash stock rom and it will happen for me again and again. Can you guys help me find working twrp that doesn't get me a security error. Maybe it's the lollipops boot stack that's getting me this error,maybe i need to downgrade to kitkat and then flash twrp on kk boot stack? thanks for your help.

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[Q] Unable to install TWRP Recovery after CM12 YNG1TAS1K0 update

Hello Folks!!!
I was on a Rooted Stock 5.0.2 CM12 ROM with TWRP recovery, when I got the notification for an OTA update (YNG1TAS1K0). I found out that we had to flash stock recovery to install the update, so I did that, but the OTA update wouldn't install and kept throwing error saying something like "unable to update /sideload/". After multiple attempts, I finally flashed the whole ROM (cm-12.0-YNG1TAS1K0-tomato-signed.zip) via the stock recovery, and now I am on the latest stock build (YNG1TAS1K0). Unfortunately, I am stuck on the stock recovery now. Whenever I try to flash the TWRP recovery (TWRP 2.8.6.0 for Lollipop), it goes into bootloop. I have temporarily flashed stock recovery again to make my phone usable again, but I would really like to flash TWRP again and root it. Any advice/suggestions will be appreciated. Thanks. :highfive:
acemccloud1 said:
Hello Folks!!!
I was on a Rooted Stock 5.0.2 CM12 ROM with TWRP recovery, when I got the notification for an OTA update (YNG1TAS1K0). I found out that we had to flash stock recovery to install the update, so I did that, but the OTA update wouldn't install and kept throwing error saying something like "unable to update /sideload/". After multiple attempts, I finally flashed the whole ROM (cm-12.0-YNG1TAS1K0-tomato-signed.zip) via the stock recovery, and now I am on the latest stock build (YNG1TAS1K0). Unfortunately, I am stuck on the stock recovery now. Whenever I try to flash the TWRP recovery (TWRP 2.8.6.0 for Lollipop), it goes into bootloop. I have temporarily flashed stock recovery again to make my phone usable again, but I would really like to flash TWRP again and root it. Any advice/suggestions will be appreciated. Thanks. :highfive:
Click to expand...
Click to collapse
Same problem dude...
I too got same problem, but now solved. Use all in one tool box by gohel.vishal first unlock bootloader, 2] resart phone 3] now enable usb debugging 4] again use toolbox to fash custom recovery 5] after flashing remove battery and restart into recovery, thats all.
Issue fixed using this thread:- http://forum.xda-developers.com/yureka/help/unable-to-flash-custom-recovery-t3108847
(Remember to disable "Update CM recovery" option in Developer Options)
remove battery after install recovery before restarting phone

Installing custom recovery on sm-n900v with stock lollipop rom

Hello all, I've been doing a lot of searching today to figure out if I can, and how to, install any custom recovery onto my Verizon Samsung Galaxy Note 3 on Android 5.0. I want to do this so I can either install a custom rom, or use xposed. But now that I'm on 5.0 I'm not sure what's possible anymore. I can root just fine, but installing TWRP with Flashify, or CWM with ROM Manager just puts my phone in a soft lock when I power it up. Giving me an error because it recognizes that I've installed a custom recovery, so it just locks my phone. I've gotten out of this twice now but using Odin to install the Lollipop rom again. To reiterate, is there any way I can install custom recovery on this phone now? I've seen some conflicting things in my searches so I have no idea what the case is.
Thanks
If the phone has a locked bootloader, a custom recovery can't be installed.

Asus zenfone selfie flash cm without unlocking bootloader

I have flashed twrp recovery and got it without unlocking bootloader, what happens if I try to flash CM, will it cause any issues, because bootloader isn't unlocked?
Probably
Btw how did u install recovery ?
HELP!!!
How did u install twrp brother????
plz help me out.Im stuck in bootloop.
For safety just unlocked your bootloader, flash the latest twrp3.0.2-5 and flash CM13/CM14. Make sure you are on stock MM firmware before flash CM13 version and above.
Hello, due to a selfie block I had to install TWRP and CM14.1
Is there a way to reinstall the stock rom?
If I try to install from TWRP, risk that hangs around?
ps. the stock rom I took from the site Asus, if that.
Please, I'm ruined, I accept any advice
pm me i will help u to rool back i found how to install OFW and CFW easy !

TWRP installed, but unable to boot into rom

Hello,
I've installed twrp on my lg g2 802. Using twrp i tried to install lineageos, but on reboot the screen remains black. I see the monitor on but nothing happens. I have to force the reboot. I can still go into recovery but i don't understand where is the problem.
I already tried to wipe everything, and i installed latest nightly of lineageos (no gapps).
Da you have an idea?
I have this same exact problem. I hope a solution is out there!
i installed from a kitkat. Maybe this can be a problem? Should i install lineage from a lollipop?
Flash this
https://forum.xda-developers.com/lg-g2/development/boot-g2-hybrid-bootstacks-t3183219
I got LineageOS to work!
It was a long grind of reading various posts on here and looking up other info on google, but I finally got my phone to run LineageOS.
The three things that I think are key are:
Making sure your phone is starting off with kitkat. I wasn't able to root my phone with lollipop. Stumproot, towelroot, and ioroot all didn't work. Once I downgraded to kitkat, I rooted successfully with ioroot.
After getting TWRP, updating it to 3.1.0. I had to first get an older version and then flash 3.1.0
Change the bootloader to kitkat if it isn't on it already. I used Bootloader Changer.
emilio84music said:
i installed from a kitkat. Maybe this can be a problem? Should i install lineage from a lollipop?
Click to expand...
Click to collapse
Yes u need lp bootstacks. Or you can simply get to the stock lollipop using flashtool and then flash lineage os
Thank you for support. Now it works

My oneplus 5 does not recognize rom stock!!

I'm using the xxxNolimits rom 5.1.3. When I try to do the procedure to update the version of the oxygen I can not. I downloaded the rom from the site of oneplus, 5.1.4, I make the flash in the TWRP blu spark latest version and when I reboot the message "no OS installed"
I do not know what to do, my oneplus only recognizes the custom rom if I try to go back to the stock it does not recognize. It's like I'm not flashing anything. MA does not appear any error during the flashing of the stock rom by twrp
Could someone help me?
if u flashed stock rom only,the recovery would be stock recovery after reboot,check it
then u could adb sideload in recovery mode ag
last option is flashing unbrick rom

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