I have an unlocked SHT-AL09 with TWRP and a very old Lineage 15.1.
I'd like to revert back to stock rom but I'm not sure about the steps to follow (I'm not interested into relock bootloader or replace recovery, but I can do if it's mandatory).
Can anyone point me in the right direction?
Thanks in advance!
Ok, I've followed this guide and I did it:
https://forum.xda-developers.com/mediapad-m5/how-to/unbrick-mediapad-m5-install-otas-t3856312 (even if my tab wasn't bricked)
Now I've relocked the bootloader and the tablet is downloading the latest OTA updates...
Related
I rooted my TMo HTC One (still s-on), installed TWRP, and immediately took a back up, before flashing anything else. If I need to return to stock, can I just restore said backup and re-lock the bootloader? I did NOT install any firmware updates.
Sisyphus306 said:
I rooted my TMo HTC One (still s-on), installed TWRP, and immediately took a back up, before flashing anything else. If I need to return to stock, can I just restore said backup and re-lock the bootloader? I did NOT install any firmware updates.
Click to expand...
Click to collapse
Here's a nice step-by-step guide on restoring to stock for T-Mobile. --> http://forum.xda-developers.com/showthread.php?t=2357624
I just followed the guide today and have a complete untouched, stock phone now.
Greetings
I foolishly upgraded my tablet to the latest version (4.2.2) before rooting my device. I understand that 4.2.2 cannot be rooted at this time. If I am wrong, please let me know.
So....I downloaded EMMA, unlocked my tablet, installed EMMA and proceeded to (as I though) downgrade to 4.1.2, in order to root the tablet and then upgrade.
EMMA happily installed the downgrade and indicated it was successful. Upon restarting my tablet, I noticed that I still had 4.2.2. I tried to again install the downgrade, but no luck.
I did do a complete backup of my data, so after reinstalling my apps, I was able to restore data and get my tablet back to its original (4.2.2) state. Of course, I am sitting with an unlocked device. I did not see any way on EMMA to relock the bootloader.
Without overly trying the patience of those who have far more knowledge of these matters than I, here are a few questions:
-why didn't the downgrade take?
-given I have an unlocked device, is there an alternate method to downgrade, root, protect root, upgrade and relock device?
-if number 2 is not possible what is the easiest and quickest way to relock the bootloader.
-is rooting 4.2.2 a question of when or if?
I would like to thank you all for reading this and any help you have to offer.
Have a good day.
gderreck said:
Without overly trying the patience of those who have far more knowledge of these matters than I, here are a few questions:
-why didn't the downgrade take?
-given I have an unlocked device, is there an alternate method to downgrade, root, protect root, upgrade and relock device?
-if number 2 is not possible what is the easiest and quickest way to relock the bootloader.
-is rooting 4.2.2 a question of when or if?
I would like to thank you all for reading this and any help you have to offer.
Have a good day.
Click to expand...
Click to collapse
Emma does not downgrade. It only installs the latest ROM ("service") for your device. It wrongly shows you the previous version in the list of services available (.370 for example for my 311). If you view the ''service" details in the bottom of the right-hand panel in Emma, you will see it actually refers to the latest ROM, not the previous.
Also, as far as I know, you cannot re-lock your bootloader with Emma. You will have to use Flashtool - search these forums or Google it for a "how to". Why do you want to re-lock?
There is a way to get root on 4.2.2 if you have an unlocked bootloader, see here :
http://forum.xda-developers.com/showthread.php?t=2392092&page=24 , post #232. I have not tried this myself, so I can't say if it works.
A little tip for you - when asking a question here, please state your device version (311, 312 or 321).
gderreck said:
Greetings
I foolishly upgraded my tablet to the latest version (4.2.2) before rooting my device. I understand that 4.2.2 cannot be rooted at this time. If I am wrong, please let me know.
So....I downloaded EMMA, unlocked my tablet, installed EMMA and proceeded to (as I though) downgrade to 4.1.2, in order to root the tablet and then upgrade.
EMMA happily installed the downgrade and indicated it was successful. Upon restarting my tablet, I noticed that I still had 4.2.2. I tried to again install the downgrade, but no luck.
I did do a complete backup of my data, so after reinstalling my apps, I was able to restore data and get my tablet back to its original (4.2.2) state. Of course, I am sitting with an unlocked device. I did not see any way on EMMA to relock the bootloader.
Without overly trying the patience of those who have far more knowledge of these matters than I, here are a few questions:
-why didn't the downgrade take?
-given I have an unlocked device, is there an alternate method to downgrade, root, protect root, upgrade and relock device?
-if number 2 is not possible what is the easiest and quickest way to relock the bootloader.
-is rooting 4.2.2 a question of when or if?
I would like to thank you all for reading this and any help you have to offer.
Have a good day.
Click to expand...
Click to collapse
Have a look here for downgrade instructions:
http://forum.xda-developers.com/showthread.php?t=2427256
I've done it yesterday and am glad i got rid of that dreadful phablet UI.
Thank you both for your replies. Mode is SGP311. I bought it from Sony Canada. I'm not sure if that is significant. Would I be correct in guessing that the US firmware is different from the Canadian version?
Thanks
gderreck said:
Thank you both for your replies. Mode is SGP311. I bought it from Sony Canada. I'm not sure if that is significant. Would I be correct in guessing that the US firmware is different from the Canadian version?
Thanks
Click to expand...
Click to collapse
Take a look here:
"http://forum.xda-developers.com/showthread.php?t=2433466"
Given that you have a SGP311, you should be able to root stock 4.2.2 using this.
I'm finally taking the plunge and upgrading my note 2. I'm currently on Wilson's cm12.1. I'm looking for a guide or recommendations to restore my phone to 100%stock. I know there's already some guides out there but none seem to be updated or explain how to downgrade from where I am at now with cm12.1. Any help or guidance will be greatly appreciated.
Odin back to VRAMC3 firmware which will re-lock the bootloader. You may want to re-unlock since it is getting rare these days and people might want it unlocked. Probably don't want to take an OTA of any kind regardless.. bootloader will get locked permanently.
Remember DO NOT TAKE AN OTA EVER!
So today I think I really messed up I will tell you the run down. I first put on twrp and then flashed a custom rom. After that the rom wasn't working properly so I tried to revert back to stock without a backup (I know I am dumb ). After reverting back to stock unsuccessfully I locked the bootloader not knowing that it wouldn't let me launch into the already installed custom software's so now I am stuck in download mode not able to unlock bootloader for some reason and not able to access the rom and the recovery. Any help would be very appreciated. Have I really bricked my phone?
can't you just run an RUU since your bootloader is relocked?
Please bear with me since I'm not too experienced on this and did research on XDA to the best I could before asking. I'm planning on returning my device to stock, but I'm worried I might brick it. I'm currently running the Skydragon 9.0 rom (http://forum.xda-developers.com/att-htc-one-m8/development/rom-sd-4-0-sense7-port-sdkernel-t3062367) and toggled on quite a lot of things. Mainly, I remember allowing it to overwrite my current kernel.
My device has S-ON from what I saw on HBOOT, is using the Skydragon custom kernel, and I'm using TWRP custom recovery. I still have the RUU I downloaded from AT&T to return my device to stock 5.0.2 firmware. My question is, shall I just run the RUU and it will all be back to stock? Should I flash the stock recovery first? Should I relock the bootloader first? and if any of those are true, in what order?
The guide which seemed the most similar to me was this one http://forum.xda-developers.com/showthread.php?t=2751011 but that required S-OFF which I don't have and don't think it's a good thing to have. Could anyone point me in the right direciton? thanks!
First of all, what is your intent in returning to stock: to sell or give away the phone? Or return for warranty service?
sarxion said:
Please bear with me since I'm not too experienced on this and did research on XDA to the best I could before asking. I'm planning on returning my device to stock, but I'm worried I might brick it.
Click to expand...
Click to collapse
You won't brick the phone with s-on. You just won't.
You might screw something up, and temporarily render the phone unable to boot. But that can easily be fixed with the right knowledge; and that is not a brick.
sarxion said:
I'm currently running the Skydragon 9.0 rom (http://forum.xda-developers.com/att-htc-one-m8/development/rom-sd-4-0-sense7-port-sdkernel-t3062367) and toggled on quite a lot of things. Mainly, I remember allowing it to overwrite my current kernel.
Click to expand...
Click to collapse
On this device, flashing a custom ROM always overwrites the kernel. What you selected when you flashed the ROM, is to flash the custom SD kernel instead of flashing the "stock" HTC kernel that came with the ROM base (that Skydragon 9 is based on).
None of that matters, once you return to stock, the custom ROM (including kernel) and any other settings, tweaks, etc. will be returned to their "stock" condition.
sarxion said:
My question is, shall I just run the RUU and it will all be back to stock?
Click to expand...
Click to collapse
Will "all" be back to stock? No. The bootloader will still say RELOCKED instead of the original LOCKED condition. You need s-off to make it say LOCKED.
Also bear in mind that HTC has a record of you unlocking the bootloader, if you did it via HTCDev.com (which is most likely the case). Nothing will change that fact, and it should be disclosed to potential buyers if selling/trading the phone (that it was bootloader unlocked and modded, then returned to near-stock condition).
But everything else will be back to stock after RUU: Stock ROM, stock kernel, stock recovery, and the user data will be wiped.
sarxion said:
Should I flash the stock recovery first? Should I relock the bootloader first? and if any of those are true, in what order?
Click to expand...
Click to collapse
No need to flash stock recovery.
You will need to relock the bootloader to RUU.
Backup (move) anything you want to keep (personal photos, etc.) to your computer, etc. before RUU, as RUU will wipe the phone.
sarxion said:
The guide which seemed the most similar to me was this one http://forum.xda-developers.com/showthread.php?t=2751011 but that required S-OFF which I don't have and don't think it's a good thing to have.
Click to expand...
Click to collapse
As I've mentioned, s-off is only needed if you want to return the phone to LOCKED (instead of RELOCKED). I will agree its probably not necessary to spend $25 for s-off just to do that.
Further, the guide is very old (May 2014 - right after the phone was released) and probably before any RUU was available. It follows a much more complicated path to "return to stock" and needlessly so.
Just relock the bootloader and run the RUU, is my recommendation.
redpoint73 said:
First of all, what is your intent in returning to stock: to sell or give away the phone? Or return for warranty service?
You won't brick the phone with s-on. You just won't.
You might screw something up, and temporarily render the phone unable to boot. But that can easily be fixed with the right knowledge; and that is not a brick.
On this device, flashing a custom ROM always overwrites the kernel. What you selected when you flashed the ROM, is to flash the custom SD kernel instead of flashing the "stock" HTC kernel that came with the ROM base (that Skydragon 9 is based on).
None of that matters, once you return to stock, the custom ROM (including kernel) and any other settings, tweaks, etc. will be returned to their "stock" condition.
Will "all" be back to stock? No. The bootloader will still say RELOCKED instead of the original LOCKED condition. You need s-off to make it say LOCKED.
Also bear in mind that HTC has a record of you unlocking the bootloader, if you did it via HTCDev.com (which is most likely the case). Nothing will change that fact, and it should be disclosed to potential buyers if selling/trading the phone (that it was bootloader unlocked and modded, then returned to near-stock condition).
But everything else will be back to stock after RUU: Stock ROM, stock kernel, stock recovery, and the user data will be wiped.
No need to flash stock recovery.
You will need to relock the bootloader to RUU.
Backup (move) anything you want to keep (personal photos, etc.) to your computer, etc. before RUU, as RUU will wipe the phone.
As I've mentioned, s-off is only needed if you want to return the phone to LOCKED (instead of RELOCKED). I will agree its probably not necessary to spend $25 for s-off just to do that.
Further, the guide is very old (May 2014 - right after the phone was released) and probably before any RUU was available. It follows a much more complicated path to "return to stock" and needlessly so.
Just relock the bootloader and run the RUU, is my recommendation.
Click to expand...
Click to collapse
Thank you very much for your quick answer. I'm returning it to stock firmware to sell the device. Is it safe to lock the bootloader while Skydragon is on my device? and after that, just run the AT&T RUU and I'm done, right?
Also, do you by any chance have any resource on how to relock the bootloader? I've searched for guides on this but I the guides I find don't look very trustworthy, or don't apply, such as this one that requires S-OFF http://forum.xda-developers.com/showthread.php?t=2708571
sarxion said:
Thank you very much for your quick answer. I'm returning it to stock firmware to sell the device. Is it safe to lock the bootloader while Skydragon is on my device? and after that, just run the AT&T RUU and I'm done, right?
Click to expand...
Click to collapse
Correct. It doesn't matter what ROM is on the device when you relock the bootloader. The phone will be rendered unable to boot (may even wipe OS) when you relock.
sarxion said:
Also, do you by any chance have any resource on how to relock the bootloader? I've searched for guides on this but I the guides I find don't look very trustworthy
Click to expand...
Click to collapse
I don't know what you mean by "trustworthy". But you won't fine a "guide" because its a single fastboot command: fastboot oem lock
redpoint73 said:
Correct. It doesn't matter what ROM is on the device when you relock the bootloader. The phone will be rendered unable to boot (may even wipe OS) when you relock.
I don't know what you mean by "trustworthy". But you won't fine a "guide" because its a single fastboot command: fastboot oem lock
Click to expand...
Click to collapse
Thank you very much. So I can run the RUU with my M8 on bootloader mode? Because after relocking the bootloader, I'm asuming it probably won't even boot since it's running a custom ROM and kernel. (I'll be running the exact same RUU version I ran before installing the custom rom)
sarxion said:
So I can run the RUU with my M8 on bootloader mode?
Click to expand...
Click to collapse
The RUU will run with the phone in bootloader-fastboot mode, yes.
sarxion said:
Because after relocking the bootloader, I'm asuming it probably won't even boot since it's running a custom ROM and kernel.
Click to expand...
Click to collapse
That is correct. And in fact, as far as I know, the phone is rendered unable to boot into OS after relocking the bootloader, even if you were on the stock ROM.
OP,
Were you able to go back to stock?