Downgrading from 2.1 to 1.56 - Hero CDMA General

After much research on the site, I wasn't able to locate anything current on if a 2.1 can be downgraded back to the 1.56 version?
I am currently running the latest v1.56 fresh mod, and it runs great and have no problems with it. I am debating on upgrading to the newest Cyanogen mod, but I do NOT want to be stuck w/ 2.1 if it doesn't work properly. I had to have Sprint send me a new phone after I upgraded last time because the 2.1 just totally screwed with my in-car bluetooth device. Right now, bluetooth is very stable and such, but now just wanting to try the update.
If I wanted to downgrade, how exactly would I do that? I'm kinda gunshy on doing this since it all seems to be working fine right now.
Any help is appreciated!

Just root your 1.56 device as it is, using an old root method for 1.5 versions. Do NOT apply the 2.1 RUU or use the root steps for 2.1.
When you're rooted on 1.56 and have a custom recovery, you can apply any ROM you want, including the newer 2.1 ROMs.....all without fully upgrading your whole phone to the stock 2.1 release.
This is what I've done. Technically my phone is still on 1.5 root, because I never applied the official 2.1 RUU. But with the custom recovery image (you'll see how to get that in the rooting guide), I am running a 2.2 ROM. I could easily uninstall/delete this ROM and still return to the 1.5 stock state.
This will let you try CM6 or any other 2.1 or 2.2 ROMs without crossing that "can't go back" state. PM me for more help if you'd like.
See this link for the 1.5 rooting guide: http://forum.xda-developers.com/showthread.php?t=583291

Related

Downgrading to stock 2.1 from Froyo, UK Nexus One

Hey all,
Been looking around for answers to this now, not finding any.
Is it possible, and easy, to downgrade back to the stock 2.1 ROM from Froyo? I've got a Stock N1 that i upgraded to Froyo. Now i hear that Google pulled the official file and i am thinking of going back to 2.1 until they push the 2.2 OTA.
Also, is there any difference between the UK stock 2.1 ROM and the US?
Appreciate any help, thanks.
Only if you root.

EVO UNREVOKED 3 working w/froyo 2.2 and OMJ's ROM

just install EVO UNREVOKED 3 before you upgrade to froyo 2.2 and then you can install OMJ's ROM and everything will work, i did on 2 phone without any problems.
hang on, you installed OMJ's rom without a proper root OR a NAND unlock??

how to root / get custom recovery on stock 2.2

Hi
I have installed stock 2.2 via the 'update.zip' route on my HTC Incredible. Need to know how I can get root now, as I had already s-off'd earlier before applying the 2.2 update.
HTC Incredible
Android 2.2 - nbuild 3..21.605.1
Baseband ver 2.15.00.07.28
s-off
thanks and regards
ananth
Look on unrevokes site.
http://unrevoked.com/rootwiki/doku.php/public/forever#reinstalling_an_official_recovery
or flash this http://downloads.unrevoked.com/forever/recovery/clockworkmod/PB31IMG.ZIP

TMO Gingerbread Root?

Are we still unable to root if on TMO's 2.15 GB update? Just got a replacement phone today (old one's wifi finally went out), and I wanted to use Titanium to restore apps etc.
no but theres a downgrade guide all over the Android Development forums that shows you how to downgrade your gingerbread device to stock froyo 2.2...From there you can use any root method you want for the G2
Edit: heres the guide http://forum.xda-developers.com/showthread.php?t=1178912
Bleh, shoulda rooted before I manually upgraded then.

HTC M8 The Legend and how to Upgrade!

Hello guys i decide to open this new thread to ask a few question to clear this out for myself since it last before long time i almost forgot everything.
I bought my m8 imideately after the release and till now NO other device grab my attention in design hardware Sound and etc. So after years of use i drop it several times u know... and i start to have problems sometimes losing signal sometimes when making a call its a bad ass people dont hear my sometimes i dont hear them or the call just drops etc also several sratches.
Anyway i decide to get A NEW M8 second hand in fully working condition in perfect shape without any sings of use. becuase i really love this device.
The previous one was HTCdevs unlocked then Rooted then S OFF with firewater and right now is still runing the latest S.Team ROM
The "New One" that i bought is with Stock Software, Firmware S-ON all is super stock.
As far as i read i cannot S OFF it anymore like before i did with my previous M8 with firewater.
What i can do in order to be able to flash a custum Firmware?
I don`t know what is best for the phone... because i did update my old device from day 1st till now with every new release of Android or Firmware.
Like i say the new one is super clean Stock
Can i jump directly to the latest Android 6 Custum ROM i want?
what i shold do 1st?
HTCdev then ROT and S-OFF?
if i change the motherboard of with the old one that is fully unlocked this will grand me all benefits of S OFF?
For example i want to go all the way from Pure Stock Android 5 lets says to latest Custum S.Team ROM
what i should do best?!
Thank you in advance
I'll answer some of these questions
1. Firewater no longer works, you have to use sunshine now to s-off.
2. To get the newest firmware just update to newest version through OTA, make sure you got locked bootloader. After that you can do whatever you want - unlock bootloader, flash roms, s-off, etc.
If you have a few bucks to spend, you can S-Off your device, but in my case, I have this phone 3 years already and still S-On and have flashed numerous custom ROM's already and I'm happy with it. ?
Sent from my m8 using Tapatalk
tsalta said:
Can i jump directly to the latest Android 6 Custum ROM i want?
Click to expand...
Click to collapse
As long as the phone is currently on Marshmallow, then yes just unlock bootloader, flash TWRP 3.1, and flash the desired ROM.
tsalta said:
if i change the motherboard of with the old one that is fully unlocked this will grand me all benefits of S OFF?
Click to expand...
Click to collapse
Unless you are really skilled with that sort of thing, I'd leave it well enough alone. I've seen a lot go wrong with taking the phone apart. So you risk ruining a brand new phone, for no good reason. Spend the money for sunshine, if you need s-off for a specific reason. But you don't even need s-off for flashing ROMs, firmware, or most other mods.
I'm in the same boat. I just bought an carrier unlocked brand new M8 because.....well....I love this phone. I too have had my current M8 since release but now the charging usb port is acting up. I'm very interested in rooting my new M8. I never did my current one.. My new phone is coming with Android 4.2 I think. Should I I OTA it as soon as it comes in or unlock the bootloader etc flash TWRP before and the just flash a custom ROM?
Saleen28 said:
I'll answer some of these questions
1. Firewater no longer works, you have to use sunshine now to s-off.
2. To get the newest firmware just update to newest version through OTA, make sure you got locked bootloader. After that you can do whatever you want - unlock bootloader, flash roms, s-off, etc.
Click to expand...
Click to collapse
I was rooted, unlocked bootloader with s-off. I went back to stock and got all OTAs. So, is locked bootloader necessary?
theandies said:
My new phone is coming with Android 4.2 I think. Should I I OTA it as soon as it comes in or unlock the bootloader etc flash TWRP before and the just flash a custom ROM?
Click to expand...
Click to collapse
You should OTA and update to Marshmallow before unlocking the bootloader.
Especially if it comes with 4.3 (or anything before Lollipop Android 5), the firmware won't be compatible with the current ROMs, and you will be stuck with issues like no boot, no WiFi, etc. Also, the current TWRP versions will not be compatible with older firmwares.
So short story, you must update in order to flash current ROMs.
---------- Post added at 12:21 PM ---------- Previous post was at 12:15 PM ----------
ramsabi said:
I was rooted, unlocked bootloader with s-off. I went back to stock and got all OTAs. So, is locked bootloader necessary?
Click to expand...
Click to collapse
Unlocked bootloader is okay for OTA updates. However, you will need to restore a stock never rooted ROM (unrooted will work - OTA will fail) and stock recovery in order to OTA update.
Rooted ROM will cause OTA to fail. Custom recovery will cause the update to get stuck, as it expects and requires stock recovery.
Return to stock ROM and stock recovery with using this guide: https://forum.xda-developers.com/htc-one-m8/help/tutorial-how-to-stock-stock-twrp-t3086860
And to be clear, there are no updates beyond Marshmallow for this device.
redpoint73 said:
Unlocked bootloader is okay for OTA updates. However, you will need to restore a stock never rooted ROM (unrooted will work - OTA will fail) and stock recovery in order to OTA update.
Rooted ROM will cause OTA to fail. Custom recovery will cause the update to get stuck, as it expects and requires stock recovery.
Return to stock ROM and stock recovery with using this guide: https://forum.xda-developers.com/htc-one-m8/help/tutorial-how-to-stock-stock-twrp-t3086860
And to be clear, there are no updates beyond Marshmallow for this device.
Click to expand...
Click to collapse
I was rooted, with bootloader off, s-off with TWRP. Did not have stock recovery. Found my version of stock RUU here on XDA, thankfully, installed and received all the OTA's. Am now Android 6.0, HTC Sense 6.0 Software Number 6.12.1540.4.
ramsabi said:
I was rooted, with bootloader off, s-off with TWRP. Did not have stock recovery. Found my version of stock RUU here on XDA, thankfully, installed and received all the OTA's. Am now Android 6.0, HTC Sense 6.0 Software Number 6.12.1540.4.
Click to expand...
Click to collapse
Stock recoveries are posted on the guide I linked. But yes, RUU is a valid method as well to return to stock and/or update. On that note, you could have just RUU'ed up to any version, and not done any OTAs. Marshmallow RUU's for US versions (which yours is) is a slight exception, where you have to flash the 6.12.1540.4 firmware using fastboot, then you can run the 6.12.1540.4 RUU.
No need for s-off to flash a custom ROM/kernel. Just unlock via htcdev, flash twrp recovery via adb, be sure the zip of the new rom is on the internal memory/sdcard, flash it, done. I recommend leedroid + clumsy kernel or ice + clumsy(on ice keep in mind that sometimes it freeze on boot htc logo around the first few restarts, hard restart it and it should be fine, if it's not - clean only cache via twrp and it will boot normal from there on).
I received my new phone, installed the AT&T sim but when I try the OTA system update all it does is say "checking". Can I manually update via PC? What update package should I download from htc?
The phone is currently on Android 4.4.4 htc Sense 6.0 Software # 3.28.401.6
theandies said:
I received my new phone, installed the AT&T sim but when I try the OTA system update all it does is say "checking". Can I manually update via PC? What update package should I download from htc?
The phone is currently on Android 4.4.4 htc Sense 6.0 Software # 3.28.401.6
Click to expand...
Click to collapse
Question has been addressed here: https://forum.xda-developers.com/htc-one-m8/help/carrier-unlocked-gsm-m8-t3598115

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