Reverted back to "Locked" bootloader, but still get error when updating to 5.1.1 OTA
I just used Nexus Root Toolkit 2.0.5 to revert back to an OEM "Locked" state which I ahd confirmed by rebooting into bootloader. The reason I did this was so I would be able to update my device with OTA updates, but I keep getting an error every time I try to update to 5.1.1.
What are my options?
Unlock, flash Nexus Factory Images.
From what I've read if you get a failed OTA install it won't let you un-root, re-lock, etc... and take the OTA. This is to protect your device.
ETA: Do you even have to have the BL flag locked to take an OTA? I don't think so...
livinginavacuum said:
I just used Nexus Root Toolkit 2.0.5 to revert back to an OEM "Locked" state which I ahd confirmed by rebooting into bootloader. The reason I did this was so I would be able to update my device with OTA updates, but I keep getting an error every time I try to update to 5.1.1.
What are my options?
Click to expand...
Click to collapse
NEVER NEVER NEVER NEVER NEVER LOCK YOUR BOOTLOADER!!!!
1) This does not in ANY WAY impact OTAs.
2) This has the potential to *LOCK YOU OUT*.
Get your updates here:
https://developers.google.com/android/nexus/images
So then how can I go back to being able to update via OTA?
livinginavacuum said:
So then how can I go back to being able to update via OTA?
Click to expand...
Click to collapse
If you want to get OTA's, fastboot flash the stock system.img and boot.img > https://developers.google.com/android/nexus/images
But if you're going to do that, why not just fastboot flash the 5.1.1 factory images?
As posted above, do not relock your bootloader. It does not impact your ability to accept OTA's and can end up bricking your device.
cam30era said:
If you want to get OTA's, fastboot flash the stock system.img and boot.img > https://developers.google.com/android/nexus/images
But if you're going to do that, why not just fastboot flash the 5.1.1 factory images?
As posted above, do not relock your bootloader. It does not impact your ability to accept OTA's and can end up bricking your device.
Click to expand...
Click to collapse
Is there an idiot's proof guide to this?
And besides helping me unlock my device once again as you guys recommend, can the Nexus Root Toolkit make my life easier by flashing the the stock system.img and boot.img so that I can get OTA's?
livinginavacuum said:
Is there an idiot's proof guide to this?
And besides helping me unlock my device once again as you guys recommend, can the Nexus Root Toolkit make my life easier by flashing the the stock system.img and boot.img so that I can get OTA's?
Click to expand...
Click to collapse
Here's a guide. Note: use the "Long method" > http://forum.xda-developers.com/nexus-9/general/guide-how-to-unlock-bootloader-flash-t3035153
Toolkits are OK if you understand how to fix a problem when you run into trouble. I'd suggest that you use the manual method, but it's your decision. There's a thread in the Development section for NRT if you choose to go that way.
Related
Hello all, I used the htc unlock method, but I am not able to flash a different radio version.
Does anyone know how to do that?
(Just booting into bootloader does not do the trick like it would normal unlock methods)
Thanks.
Anyone?
Sent from my PG86100 using XDA App
have you tried the commands
adb reboot bootloader
fastboot boot recovery.img
and flashing the radios from fastboot? or FlashimageGUI (which probably will not work for radios)
I have been wondering this myself. I have not heard of any methods that have come up to allow this recently. Same thing goes for splash images as I havent seen any method for those.
I have an idea of how it may be possible though. Perhaps someone else with a bit more knowledge can chime in to let us know if it is possible or not.
Anyhow.
Being officially unlocked I don't believe that ROOT is an issue like it is on an unofficial method. I know typically you would NOT accept an OTA to prevent the loss of ROOT. However, being an officially unlocked device, I am not sure if it matters.
I know that when I unlocked my device I had to manually unlock it, then I installed my recovery, then I simply flashed SU to it. My thought is that you can take the OTA. If the OTA doesn't work, you may have to re-lock the device, then run the OTA. But I believe the OTA would be safe. Once OTA completed, then flash your unlock token again, put recovery back on, then flash SU again.
Or I believe you could also wait for the new RUU instead of an OTA. Put on stock ROM, re-lock, run RUU, re-unlock, install recovery, flash SU.
The problem is that you may not be able to flash back to the previous radio once you are done.
Any thoughts on this?
UPDATE: I recently (like two minutes ago) learned that an RUU will not update a radio. I was under the impression that they did. Since it will not, I guess the RUU method will not work. Still curious about the OTA method though.
From the HTCDev Q and A:
HTCDev said:
Why is my security still on (S-On) after I have unlocked my bootloader?
Your device is shipped with Security on (S-ON) to protect your system software configuration (such as the bootloader, radio, boot, recovery, system and others). After you have unlocked the bootloader, however, you will have lifted the restrictions on boot, recovery and system. This means you can customize boot, recovery and system images on your phone as you desire. You can easily see that you have successfully unlocked the bootloader by looking at the top of the screen when entering the bootloader screen. Security is left on to protect things like the radio, and SIM lock.
Click to expand...
Click to collapse
yousefak said:
From the HTCDev Q and A:
Click to expand...
Click to collapse
Well, yeah. The S stays on to protect the radio.
But the S would be on regardless if you never rooted to begin with, but an OTA would allow the radio to update. So, my thought is that you can potentially take an OTA with the HTC unlock method and get the new radio.
If it were me, I would save my titanium file to my PC (just as a precaution), I would re-lock my device using fastboot oem lock, then I would run the RUU that matches my current software version. This would return me to stock/unrooted. At this point you should be able to accept an OTA. The OTA updates your radio/software/etc. Once you update, flash the unlock token again, then flash the superuser binary back onto the phone. Now, this would be contingent that HTC doesn't go back on their word and they dont push an OTA that prevents you from unlocking the phone.
Now, Ill admit I am not a developer, so I am not an expert, but it is my understanding that once it is unlocked putting root on the phone is pretty straight forward. You don't have to come up with a root method such as revolutionary, etc. It should simply allow Superuser because it is unlocked. If this is not the case, then Ill admit that my thought process is flawed. However, if it is the case, then why not return to stock, take an OTA, unlock, re-root, use titanium? Like I said, may not be able to return to previous radio, but why would you anyhow?
mildlydisturbed said:
have you tried the commands
adb reboot bootloader
fastboot boot recovery.img
and flashing the radios from fastboot?
Click to expand...
Click to collapse
Can someone tell me how exactly to accomplish the above?
I ran these commands and the it said "Installing update..." but the radio remains the same.
Thanks again.
I need a little help. I unlocked the bootloader, rooted my phone, made TWRP my recovery, and got s-off. I did not flash a custom ROM. Now though, there is an update for my phone. I want to update it to the latest via OTA and remain on the stock ROM until 4.2.2 comes out. It is my understanding that I may need to run an RUU since I have TWRP as my recovery. This is where I'm a little confused.
1) Which RUU do I select? (I currently have the stock T-Mobile US build version 1.27.531.7 CL170484 release-keys if that helps)
2) Afterr I flash the RUU, do I need to perform s -on and re-lock the bootloader prior to performing the OTA update?
3) Am I missing any major steps?
4) Would it be better to just use a custom ROM like Android Revolution rather than trying to revert back to stock, etc?
Thanks for any and all input.
bloodbath said:
I need a little help. I unlocked the bootloader, rooted my phone, made TWRP my recovery, and got s-off. I did not flash a custom ROM. Now though, there is an update for my phone. I want to update it to the latest via OTA and remain on the stock ROM until 4.2.2 comes out. It is my understanding that I may need to run an RUU since I have TWRP as my recovery. This is where I'm a little confused.
1) Which RUU do I select? (I currently have the stock T-Mobile US build version 1.27.531.7 CL170484 release-keys if that helps)
2) Afterr I flash the RUU, do I need to perform s -on and re-lock the bootloader prior to performing the OTA update?
3) Am I missing any major steps?
4) Would it be better to just use a custom ROM like Android Revolution rather than trying to revert back to stock, etc?
Thanks for any and all input.
Click to expand...
Click to collapse
you need to flash the original recovery to install ota updates,, you will lose root access doing so
Or wait until some package it into a ZIP file and flash using TWRP.
Right?
Just wait a week.
All you need to do is put the stock Tmo recovery on your one. Then go update with ota and you will still be unlocked but you do lose root.
So it seems like there is disagreement to whether the stock ROM causes you to lose root or not. Either way, I would need to "lock" the bootloader again right?
Does the update add anything really worth having? I'm thinking that ARHD would be the best bet until an RUU comes out.
bloodbath said:
So it seems like there is disagreement to whether the stock ROM causes you to lose root or not. Either way, I would need to "lock" the bootloader again right?
Does the update add anything really worth having? I'm thinking that ARHD would be the best bet until an RUU comes out.
Click to expand...
Click to collapse
I'm sorry I was wrong you will lose root after you update ota. But you can do ota while being unlocked so no need to relock bootloader just flash the stock Tmo recovery and update.
chong67 said:
Or wait until some package it into a ZIP file and flash using TWRP.
Right?
Just wait a week.
Click to expand...
Click to collapse
U mean something like this!? https://copy.com/aSLnP
Team-Noctural.com/androidtechy.com/droidnow.com
Hey everyone, I've done some research and found plenty of people trying to keep root while accepting an OTA, but couldn't find anything pertaining exactly to my question. does anyone know if i accept the next OTA from att will it unroot and remove the tampered banner on my m8? all i've done is root my device. haven't changed anything or flashed anything other than twrp recovery. just want to go back to stock as easily as possible.
thanks for any help
stumcmahan said:
Hey everyone, I've done some research and found plenty of people trying to keep root while accepting an OTA, but couldn't find anything pertaining exactly to my question. does anyone know if i accept the next OTA from att will it unroot and remove the tampered banner on my m8? all i've done is root my device. haven't changed anything or flashed anything other than twrp recovery. just want to go back to stock as easily as possible.
thanks for any help
Click to expand...
Click to collapse
You need to flash stock recovery, or the OTA won't install. In fact, you might even get stuck in a bootloop as the phone repeatedly boots into TWRP, looking for stock recovery (to install the OTA) and not finding it.
Also, if any system files have been modified by root, you need to return them to "stock" state. Otherwise the OTA will fail to install, saying the system has been modified. You can either return any system files to stock manually, or flash a stock ROM, nandroid, or RUU.
You will lose root when you OTA. But its an easy manner to just flash TWRP again, and flash SU/SuperSU to gain root. Unlocked bootloader is okay for OTA, so you don't even need to relock, unlock again, etc. to flash TWRP. But locked bootloader is required for RUU (unless you have s-off) if you choose that route in the paragraph above.
Cleaning this up and clarifying as my original post was vague:
It is recommended that you unlock your bootloader before the 7.0 Nougat update. Although it will still be possible the process will be more difficult and risky afterwards.as you will need to use one of the edl mode tools (axon7backup, axom7tool).
The easiest way is to download this kit f you have the A2017U: (I can't speak to other models) (This kit and instructions are thanks to @jcadduono)
https://build.nethunter.com/misc/axon7/AXON7-A2017U-BL-UNLOCK-KIT.zip
https://build.nethunter.com/misc/axon7/INSTRUCTIONS.txt
The basic steps, which the above zip with take you through in detail are:
1. Flash Official B20 , enable OEM UNLOCKING after flashing.
2. Flash BLFastboot zip provided by ZTE when they had unlock method.
3. Enable OEM UNLOCKING in Developers Option
4. Boot to Bootloader
5. type : fastboot oem unlock
6. Done
Note: If you do not have the OEM UNLOCKING flag set in developer options you will get a soft brick. Also bear in mid this will wipe data.
All that being said I've heard Nougat to is going to be great from those in the know. In their words ”Well worth the wait! Hang in there!” from a HIGHLY credible source.
Why would anyone relock before update? I do agree anyone who wants to unlock should do it now.
lokissmile said:
For anyone looking to bootloader unlock, I've heard that the methods might change when the N update rolls out. It's a major update and although I personally don't have N and can't get a direct answer because those who know for sure are under NDA. I can tell you that the advice given to me is to not re-lock. So if you are thinking of unlocking your bootloader I'd do it soon while the methods are stable. Google confirmed that daydream is certified in an upcoming update so the daydream version of the stock ROM has been through googles QA. Might as well get ready now, we will probably have another surge of custom ROMS shortly after. I'm just sharing what I think is a best practice.
Click to expand...
Click to collapse
OK, so just to make it quick, for everyone, unlock your bootloader sooner than later. It is safe since you can revert it to a locked state at any time later.
lafester said:
Why would anyone relock before update? I do agree anyone who wants to unlock should do it now.
Click to expand...
Click to collapse
I do it on occasion to test things I'm working on. Better to warn people who might do it to get PoGo or SafetyNet working I figured.
lokissmile said:
I do it on occasion to test things I'm working on. Better to warn people who might do it to get PoGo or SafetyNet working I figured.
Click to expand...
Click to collapse
No need to bootloader lock an Axon 7 to get SafetyNet (Android Pay, PoGo, etc). Just do it the XDA way. But never relock!!!!
Could one of you guys explain whats so dangerous about relocking bootloader since u seem to know something I don't.
I have unlocked and relocked my bootloader several times by fastboot oem lock and restoring my stock fbop partition.
Have I done something wrong?
Regards,
mischa_martin
mischa_martin said:
Could one of you guys explain whats so dangerous about relocking bootloader since u seem to know something I don't.
I have unlocked and relocked my bootloader several times by fastboot oem lock and restoring my stock fbop partition.
Have I done something wrong? [emoji14]
Regards,
mischa_martin
Click to expand...
Click to collapse
Read the OP.
I think what the op is trying to say is that by unlocking the bootloader you won't get ota updates. You would need to wait until a twrp flashable update is out or a rom running Android 7.
stevecaboose said:
I think what the op is trying to say is that by unlocking the bootloader you won't get ota updates. You would need to wait until a twrp flashable update is out or a rom running Android 7.
Click to expand...
Click to collapse
That's how it's been since modifying the bootloader was a thing. Unlocked bootloader = no OTA.
tzbigworm said:
That's how it's been since modifying the bootloader was a thing. Unlocked bootloader = no OTA.
Click to expand...
Click to collapse
@stevecaboose
Unlocking Bootloader = Yes to OTA's.
Modding System and Boot = NO OTA's
hope that clear things up.
Close enough lol!
To be clear, it would be best to unlock before N is pushed out. I have it on good authority that unlocking your bootloader after you update to N will be more difficult and risky. Relocking would put you in the same situation. It's trivial to return to stock system+boot with an unlocked bootloader and TWRP and then the OTA will come through just fine. Or you can just wait for the TWRP flashable N stock ROM.
So to be clear, since I'm not 100% sure what affects the "system" and "boot" areas: I can unlock my BL using only guide 2 in this link ( https://forum.xda-developers.com/axon-7/how-to/guide-install-twrp-unlock-bl-flash-t3517379 ) and still get OTAs? If I install TWRP does that make me OTA-ineligible?
ScaryBugThing said:
So to be clear, since I'm not 100% sure what affects the "system" and "boot" areas: I can unlock my BL using only guide 2 in this link ( https://forum.xda-developers.com/axon-7/how-to/guide-install-twrp-unlock-bl-flash-t3517379 ) and still get OTAs? If I install TWRP does that make me OTA-ineligible?
Click to expand...
Click to collapse
TWRP/BL unlock doesn't affect OTA, ROOT does.
raystef66 said:
TWRP/BL unlock doesn't affect OTA, ROOT does.
Click to expand...
Click to collapse
You're totally wrong there,
TWRP will affect OTA's if the OTA need to check/patch recovery, BUT been Bootloader Unlock will NOT effect OTA.
To manage a clean/successful OTA's installation, you need to be FULL STOCK. (System, boot, Recovery, aboot if the OTA need to patched).
I think the OP was trying to say that it's possible current tools will not work to unlock the bootloader after the 7.x ota is installed.
DrakenFX said:
You're totally wrong there,
TWRP will affect OTA's if the OTA need to check/patch recovery, BUT been Bootloader Unlock will NOT effect OTA.
To manage a clean/successful OTA's installation, you need to be FULL STOCK. (System, boot, Recovery, aboot if the OTA need to patched).
Click to expand...
Click to collapse
I'm not fully agreed with that. You can install OTA's when you receive it, download it, install it when first booted into twrp cache. Only if you're not rooted. When you're rooted first unroot and in principle this should work.
There are several cases on internet about that. Even I did it with an unrooted but TWRP-ed Zopo C2. Received an OTA and installed it.
Im always glad to learn but IMO there are some possibilities to do the ota after all. But I am willing to accept it's a general fact that twrp could affect the normal OTA.
Edit : let's wait and see when B10 is rolling out and if I get a notification about that and if I can install it as a normal OTA(not with SD) with TWRP. Keep you updated:cyclops:
Noob here, forgive me ...
So what is the best way to only unlock bootloader without flash twrp?
A2017U, B29.
Thanks
eladmitz said:
Noob here, forgive me ...
So what is the best way to only unlock bootloader without flash twrp?
A2017U, B29.
Thanks
Click to expand...
Click to collapse
I`m on the same boat. What should be the safer procedure to unlock BL an still get the N OTA?
eladmitz said:
Noob here, forgive me ...
So what is the best way to only unlock bootloader without flash twrp?
A2017U, B29.
Thanks
Click to expand...
Click to collapse
felipe.vella said:
I`m on the same boat. What should be the safer procedure to unlock BL an still get the N OTA?
Click to expand...
Click to collapse
1- Download Official B20 from ZTE SITE (look Software Updates for the 6gb variant)
2- look in the forum for the B20fastboot zip file
3- Move both files to your SDCARD.
4- Enable OEM Unlocking under Developers Option
5- boot to stock recovery.
6- Install B20 official update via SDCARD (this will wipe Data)
7- boot and re-enable OEM Unlocking
8- boot to recovery and install B20fastboot zip
9- boot to Bootloader and Unlock bootloader using this command.
Code:
fastboot oem unlock
If I remember correctly will reboot and factory reset the device , you'll need to re-enable OEM UNLOCKING and boot to Bootloader to flash TWRP 3.0.3 USING fastboot commands
So, long story short, I recently bought a Nexus 9 from ebay which arrived with factory reset protection.
I have spoken to both Google and HTC about the situation and both were of no real help except for saying a few things outright between them to give me good enough reason to believe one of two things.
That 1 - it is possible to flash factory images over a device with a locked bootloader
or 2 - it is possible to unlock the bootloader without having access to developer settings
Anyone have any experience with either of these possibilities?
https://developers.google.com/android/ota
Full OTA Images can be flashed onto devices with locked boot loaders.
You need to boot into recovery and select sideload update.
Yeah, I know how to do that, but that only goes for updates, doesn't it? I tried to sideload a previous build onto the tablet but it failed the procedure, so it doesn't really solve the issue and if I flash a more recent update I still get FRP :/ If I wanted to revert back to the 7.0, or even marshmallow, would that be possible? Or does that require an unlocked bootloader?
enriquejones666 said:
https://developers.google.com/android/ota
Full OTA Images can be flashed onto devices with locked boot loaders.
You need to boot into recovery and select sideload update.
Click to expand...
Click to collapse
Yeah, I know how to do that, but that only goes for updates, doesn't it? I tried to sideload a previous build onto the tablet but it failed the procedure, so it doesn't really solve the issue and if I flash a more recent update I still get FRP :/ If I wanted to revert back to the 7.0, or even marshmallow, would that be possible? Or does that require an unlocked bootloader?
BigDomTheFirst said:
Yeah, I know how to do that, but that only goes for updates, doesn't it? I tried to sideload a previous build onto the tablet but it failed the procedure, so it doesn't really solve the issue and if I flash a more recent update I still get FRP :/ If I wanted to revert back to the 7.0, or even marshmallow, would that be possible? Or does that require an unlocked bootloader?
Click to expand...
Click to collapse
Those are full ota images, same as factory image. Meaning full package.
BigDomTheFirst said:
Yeah, I know how to do that, but that only goes for updates, doesn't it? I tried to sideload a previous build onto the tablet but it failed the procedure, so it doesn't really solve the issue and if I flash a more recent update I still get FRP :/ If I wanted to revert back to the 7.0, or even marshmallow, would that be possible? Or does that require an unlocked bootloader?
Click to expand...
Click to collapse
Ah yes, now I see your predicament. Unfortunately, there is no "there" there. You do need an unlocked bootloader to wipe the system clean with a factory image, and as you noted, the Full OTA Image will recover you from a system that won't boot, but it won't get rid of FRP.
enriquejones666 said:
Ah yes, now I see your predicament. Unfortunately, there is no "there" there. You do need an unlocked bootloader to wipe the system clean with a factory image, and as you noted, the Full OTA Image will recover you from a system that won't boot, but it won't get rid of FRP.
Click to expand...
Click to collapse
Exactly Hence my questions as to how do the manufacturers wipe everything and flash the new image without unlocking the bootloader? Or will it always be a trade secret?...... Hmmmm
BigDomTheFirst said:
Exactly Hence my questions as to how do the manufacturers wipe everything and flash the new image without unlocking the bootloader? Or will it always be a trade secret?...... Hmmmm
Click to expand...
Click to collapse
did we ever fix this? my bootloader is locked and no os installed. Was trying to return to factory and went thru all the flashing steps successfully then at the end locked the bootloader. Now tablet says "for development purposes only not for production use" and boots back to fastboot. It will not reboot at all
Uncleheff said:
did we ever fix this? my bootloader is locked and no os installed. Was trying to return to factory and went thru all the flashing steps successfully then at the end locked the bootloader. Now tablet says "for development purposes only not for production use" and boots back to fastboot. It will not reboot at all
Click to expand...
Click to collapse
Never found out how they do this.... are you able to boot in to recovery? if you can do that you may be able to flash a recovery OTA through 'apply update from ADB'. Worth a shot
Uncleheff said:
did we ever fix this? my bootloader is locked and no os installed. Was trying to return to factory and went thru all the flashing steps successfully then at the end locked the bootloader. Now tablet says "for development purposes only not for production use" and boots back to fastboot. It will not reboot at all
Click to expand...
Click to collapse
If up dont mind my asking how did it get that way by just locking the bootloader? I was just about to flash stock and lock on my volantis, then read this...?
Bryanx86 said:
If up dont mind my asking how did it get that way by just locking the bootloader? I was just about to flash stock and lock on my volantis, then read this...?
Click to expand...
Click to collapse
definitely don't lock your bootloader. That is a horrible move and serves no purpose
madbat99 said:
definitely don't lock your bootloader. That is a horrible move and serves no purpose
Click to expand...
Click to collapse
I actually reflashed last factory stock image and relocked without issue. It is a horrible move, I agree...I already miss root, but it suits the purpose. Thanks for your reply.
Bryanx86 said:
I actually reflashed last factory stock image and relocked without issue. It is a horrible move, I agree...I already miss root, but it suits the purpose. Thanks for your reply.
Click to expand...
Click to collapse
it's only a bad move if you make a mistake and can't repair it because your bootloader is now locked. But if it goes well then you're all set.