Any possibilities to UNLOCK OEM/Bootloader on Android O (Opp3.170518.006)? - Google Pixel XL Questions & Answers

Need help here!
Bought an XL via eBay. Found that it's been flashed anyhow. And I can't root/flash ROM or even unlock the bootloader.
Now below is the situation:
1. It's a Verizon, XL, 128GB.
2. It's locked. And OEM unlocking in developer options is GREY.
3. It's stuck in Android O (Opp3.170518.006).
4. dePixel8 doesn't work. Every time I entered the commands "adb shell /data/local/tmp/dePixel8", it ended up with an error.
5. Because of 1., I can't flash TWRP or any bootloader.
I've heard of so-called "FRP Unlock Tool". But it seemed only working on 7.1.2 below and is considered risky for 8.0.
Though 8.0_DP3 is 90% perfect for daily use, I still want to take a chance. But the question is HOW?

doctorm89 said:
Need help here!
Bought an XL via eBay. Found that it's been flashed anyhow. And I can't root/flash ROM or even unlock the bootloader.
Now below is the situation:
1. It's a Verizon, XL, 128GB.
2. It's locked. And OEM unlocking in developer options is GREY.
3. It's stuck in Android O (Opp3.170518.006).
4. dePixel8 doesn't work. Every time I entered the commands "adb shell /data/local/tmp/dePixel8", it ended up with an error.
5. Because of 1., I can't flash TWRP or any bootloader.
I've heard of so-called "FRP Unlock Tool". But it seemed only working on 7.1.2 below and is considered risky for 8.0.
Though 8.0_DP3 is 90% perfect for daily use, I still want to take a chance. But the question is HOW?
Click to expand...
Click to collapse
The only time you could unlock the bootloader on a Verizon Pixel XL was before the operating system updated to Android 7.1.1. Android 7.1.1 was patched so the dePixel8 exploit would no longer work and nobody has found a new way to unlock the bootloader on the Verizon models since then. If you want to downgrade from Android O I think your only option is to deregister your phone from the Android Beta Program. Eventually you will get an OTA that will downgrade your phone back to Nougat but it will also completely wipe your phone including the user data and stored files. You will be starting over from scratch and have to download your user apps again. Unless someone comes up with a new exploit you will not be able to unlock the bootloader or custom flash anything on that phone.

If you wanted to unlock bootloader/flash roms/root etc... you should've come here first to check, then checked with the seller on ebay.
however, your options are:
1) put up with phone in stock (it's really not that bad - which is why development isn't into multiple pages of current roms)
2) sell it and get a google version rather than Verizon

Related

Android pay has stopped working

I had a Nexus 5X with stock Android 6 software. Android Pay was working fine.
I was having a few lag issues and noticed the final Nexus factory image was available for Android 7 so I decided to unlock my bootloader and install the factory image. After I installed it, Android Pay was still working fine.
Then I received an OTA update for the monthly security hotfixes which I installed. Since doing this, Android Pay doesn't work. It says something about my phone being rooted/unlocked and that Android Pay does not support this.
Can anyone tell me why this is happening? I don't need to keep my bootloader unlocked so if locking will allow me to resolve the issue without losing data then I can do this. Can anyone guide me please?
Try flashing a kernel from The Flash or Franco.
Both have a line of code that should stop the bootloader error in safetynet
Thank you but I don't want to put on any custom stuff. I just want to go back to a stock Android 7.0 ROM that works with Android Pay. I don't need root, or an unlocked bootloader. How can I go back to stock?
You can use something like wugs nexus tool.
Although some have mentioned you can brick your device trying to lock the bootloader.
Personally I have never done it. Others might have more experience.
It may or may not be easier to lock than to use a custom kernel. YMMV.
One benefit of the kernel is increased performance on your phone.
Oh and if you lock your bootloader it will completely wipe your phone. E.g. You will lose your data.
Edit.. Root isn't needed for a kernel either
Start the device in fastboot mode again, as described above.
Execute:
fastboot flashing lock
or, for older devices, run:
fastboot oem lock
Locking bootloader will wipe the data on some devices. After locking the bootloader, if you want to flash the device again, you must run fastboot oem unlock again, which will wipe the data.
Source: https://developers.google.com/android/nexus/images
Ah okay, thanks for the info. What I should have done originally was re-lock the bootloader straight after I flashed the ROM. Unfortunately, I setup the device after flashing the ROM and kept the bootloader unlocked which is why I'm stuck right now. Okay, time to backup my stuff up and re-lock the bootloader. Thanks everyone.

Google VS. Non-Google Variant Differences

This thread is to gather technical clarification for those of us who have wondered about this:
If a Google phone (e.g. Pixel / Pixel XL) is purchased from another retailer (e.g. Verizon [with a locked bootloader]), other than the physical hardware, are there any technical differences in SOFTWARE and/or CODING that would restrict flashing OEM firmware from Google after the bootloader is unlocked?
***** (Is the Verizon variant restricted from flashing Google firmware?) *****
My apologies if this has been covered in another thread.
So I went ahead and downloaded the latest "7.1.0 (NDE63P, Oct 2016)" file and attempted to flash the "flash-all.bat" file on my Verizon Pixel XL through fastboot and was unsuccessful. Attached is a screenshot of the error.
It hangs at:
"(bootloader) Flashing active slot "_b"
I'm uncertain of what this means but it didn't work. It allowed me to exit and reboot to my current state before the flash. Maybe someone can chime in on this.
I bought Verizon pixel xl from best buy. It is sim unlocked. Bootloader is locked. It can be unlocked via depixel8 sunshine method. I flashed Google stock rom nde63p and rooted. All is working 100 percent.
Radsolutionz said:
I bought Verizon pixel xl from best buy. It is sim unlocked. Bootloader is locked. It can be unlocked via depixel8 sunshine method. I flashed Google stock rom nde63p and rooted. All is working 100 percent.
Click to expand...
Click to collapse
I too, also have a Verizon variant that is bootloader-unlocked with depixel8. What am doing differently that isn't working to flash the factory image NDE63P?
1up1up said:
I too, also have a Verizon variant that is bootloader-unlocked with depixel8. What am doing differently that isn't working to flash the factory image NDE63P?
Click to expand...
Click to collapse
https://developers.google.com/android/images follow instructions exactly in the link. That's all I did. The toolkit does not work for this. Anymore problems I can assist you tomorrow. Just make sure ur phone is is bootloader mode. Also the image is fully extracted in your adb tools folder.
Radsolutionz said:
https://developers.google.com/android/images follow instructions exactly in the link. That's all I did. The toolkit does not work for this. Anymore problems I can assist you tomorrow. Just make sure ur phone is is bootloader mode. Also the image is fully extracted in your adb tools folder.
Click to expand...
Click to collapse
I'm certain I'm not missing anything here, according to steps required. It just isn't working for me.
1up1up said:
I'm certain I'm not missing anything here, according to steps required. It just isn't working for me.
Click to expand...
Click to collapse
Set it up on another computer and start from scratch. Windows 10 has some issues.... If it doesn't work and you want it done just get the device to me and I'll do it for u my self. Message me and I'll work it out with u.
My question is somewhat related so I'll post it in here.
If I unlock bootloader with depixel8, then flash the Google factory image and relock bootloader, in theory I should now have a Google version correct? Has and had success with this?
The reason I want to relock is to not trip safety net. Right now I'm enjoying the phone without root, but know I will want to root eventually and don't want to miss the easy conversion to a official Google model.
Sent from my Pixel XL using XDA-Developers mobile app
suhailtheboss said:
My question is somewhat related so I'll post it in here.
If I unlock bootloader with depixel8, then flash the Google factory image and relock bootloader, in theory I should now have a Google version correct? Has and had success with this?
The reason I want to relock is to not trip safety net. Right now I'm enjoying the phone without root, but know I will want to root eventually and don't want to miss the easy conversion to a official Google model.
Sent from my Pixel XL using XDA-Developers mobile app
Click to expand...
Click to collapse
No. Until you see Jcase or another dev post a full Google Store conversion for the Verizon Pixel, do not relock your bootloader. That is, if you want to root your Verizon Pixel in the future.
Sent from my Pixel XL using XDA-Developers mobile app
1up1up said:
So I went ahead and downloaded the latest "7.1.0 (NDE63P, Oct 2016)" file and attempted to flash the "flash-all.bat" file on my Verizon Pixel XL through fastboot and was unsuccessful. Attached is a screenshot of the error.
It hangs at:
"(bootloader) Flashing active slot "_b"
I'm uncertain of what this means but it didn't work. It allowed me to exit and reboot to my current state before the flash. Maybe someone can chime in on this.
Click to expand...
Click to collapse
Update your adb drivers. You need sdk version 25. Your error, [bootb doesn't exist] is because you are using an older sdk that can't handle all of the new partitions in the Pixels. There was no boot_a or boot_b in Nexus, which is why it doesn't know where to send the files.
1up1up said:
I too, also have a Verizon variant that is bootloader-unlocked with depixel8. What am doing differently that isn't working to flash the factory image NDE63P?
Click to expand...
Click to collapse
Most likely you are trying to flash-all with an older version of the SDK or using another older tool. flash-all only seems to work with the latest SDK or the latest tool. You can flush each of the 14 img files individually as well.
dbrohrer said:
Update your adb drivers. You need sdk version 25. Your error, [bootb doesn't exist] is because you are using an older sdk that can't handle all of the new partitions in the Pixels. There was no boot_a or boot_b in Nexus, which is why it doesn't know where to send the files.
Click to expand...
Click to collapse
I updated SDK and flash was successful. Can you please help me understand this too: now that the Google Firmware has been flashed, does that "change" the phone from a "Verizon" model to a "Google" model? Also, why is it that in Developer Options, "OEM Unlocking" is still grayed out?
Mike02z said:
Most likely you are trying to flash-all with an older version of the SDK or using another older tool. flash-all only seems to work with the latest SDK or the latest tool. You can flush each of the 14 img files individually as well.
Click to expand...
Click to collapse
I updated SDK and all is working.
1up1up said:
I updated SDK and flash was successful. Can you please help me understand this too: now that the Google Firmware has been flashed, does that "change" the phone from a "Verizon" model to a "Google" model? Also, why is it that in Developer Options, "OEM Unlocking" is still grayed out?
Click to expand...
Click to collapse
Glad to hear you got it flashed. You answered your own question. Currently there is not a way to convert the Verizon model to the Google model. They are in fact exactly the same in hardware and firmware. Zero difference. The reason that it is grayed out is because when the phone first boots up it checks for a whitelist (or maybe a blacklist) by CID or MEID. If you're phone is listed as a Verizon device, the OEM unlock option is grayed out. That is the way they locked it down. They just grayed out the toggle for the locked phones.
For the time being, the only option you have is to leave the bootloader unlocked. If you lock the bootloader, there is a good chance that it will be permanent after the November security patch. Maybe later someone figures out how to fool the check at first boot (or change the CID...). Or install a custom rom. This would be the only way to turn the device into a "Google" model.
dbrohrer said:
Glad to hear you got it flashed. You answered your own question. Currently there is not a way to convert the Verizon model to the Google model. They are in fact exactly the same in hardware and firmware. Zero difference. The reason that it is grayed out is because when the phone first boots up it checks for a whitelist (or maybe a blacklist) by CID or MEID. If you're phone is listed as a Verizon device, the OEM unlock option is grayed out. That is the way they locked it down. They just grayed out the toggle for the locked phones.
For the time being, the only option you have is to leave the bootloader unlocked. If you lock the bootloader, there is a good chance that it will be permanent after the November security patch. Maybe later someone figures out how to fool the check at first boot (or change the CID...). Or install a custom rom. This would be the only way to turn the device into a "Google" model.
Click to expand...
Click to collapse
I see... Thank you very much for explaining that.
dbrohrer said:
Glad to hear you got it flashed. You answered your own question. Currently there is not a way to convert the Verizon model to the Google model. They are in fact exactly the same in hardware and firmware. Zero difference. The reason that it is grayed out is because when the phone first boots up it checks for a whitelist (or maybe a blacklist) by CID or MEID. If you're phone is listed as a Verizon device, the OEM unlock option is grayed out. That is the way they locked it down. They just grayed out the toggle for the locked phones.
For the time being, the only option you have is to leave the bootloader unlocked. If you lock the bootloader, there is a good chance that it will be permanent after the November security patch. Maybe later someone figures out how to fool the check at first boot (or change the CID...). Or install a custom rom. This would be the only way to turn the device into a "Google" model.
Click to expand...
Click to collapse
Aside from the option to unlock/relock being greyed out, will unlocking disable the updates? I was reading another article that said if you unlock the Verizon pixel using depixel8, then you would not be able to take OTA updates. Aside from unlocking for custom roms, is there any real need to unlock?
coolhandz said:
Aside from the option to unlock/relock being greyed out, will unlocking disable the updates? I was reading another article that said if you unlock the Verizon pixel using depixel8, then you would not be able to take OTA updates. Aside from unlocking for custom roms, is there any real need to unlock?
Click to expand...
Click to collapse
Unlocking will not disable updates. In Developer Options there is a toggle to disable this. Depending on what you do to your phone after bootloader unlock, disabling this might be important to prevent bootloop during an update.
Aside from root, various flashable mods, custom rom, or custom kernel, there is not really a need to unlock. Your phone is certainly less secure by doing so. If you plan to stay completely stock, keep your bootloader locked.

How to Lock Bootloader

Hello, I purchased a Pixel 3 XL off craigslist and it is working fine, but the bootloader is unlocked therefore I am receiving a warning when restarting the phone and Google Pay does not work. How can I re-lock the bootloader? Do I need to flash the latest standard google image? The build number is: "crosshatch-userdebug 9 PQ1A.181105.013 5027108 dev-keys". When in bootloader the bootloader version is: b1c1-0.1-5004167. Obviously a n00b here, please be gentle. Thank you for any help.
Do you have a computer? If so what OS do you use?
Sent from my Pixel 3 XL using Tapatalk
superchilpil said:
Do you have a computer? If so what OS do you use?
Sent from my Pixel 3 XL using Tapatalk
Click to expand...
Click to collapse
I do have a computer, a Windows 10 Pro
Are you planning on rooting? If so, you can use Magisk Hide (after using Magisk to root of course) to get Google Pay to work. I would be hesitant to re-lock the BL unless you are certain that it is completely stock otherwise. Re-locking a modified phone can brick the device. Better to just learn how to root, etc and keep it unlocked. You have come to the right place to learn.
sliding_billy said:
Are you planning on rooting? If so, you can use Magisk Hide (after using Magisk to root of course) to get Google Pay to work. I would be hesitant to re-lock the BL unless you are certain that it is completely stock otherwise. Re-locking a modified phone can brick the device. Better to just learn how to root, etc and keep it unlocked. You have come to the right place to learn.
Click to expand...
Click to collapse
No, I don't plan on rooting. But I am afraid of bricking the phone since I don't know what has been done to it. Is there a way to determine what was done to unlock the bootloader? Otherwise I will follow your recommendation of using Magisk Hide. I would prefer to keep the phone stock. Thanks.
eec007 said:
No, I don't plan on rooting. But I am afraid of bricking the phone since I don't know what has been done to it. Is there a way to determine what was done to unlock the bootloader? Otherwise I will follow your recommendation of using Magisk Hide. I would prefer to keep the phone stock. Thanks.
Click to expand...
Click to collapse
If you live in Denver I'll trade you my Verizon one for yours. It has a locked bootloader.
eec007 said:
No, I don't plan on rooting. But I am afraid of bricking the phone since I don't know what has been done to it. Is there a way to determine what was done to unlock the bootloader? Otherwise I will follow your recommendation of using Magisk Hide. I would prefer to keep the phone stock. Thanks.
Click to expand...
Click to collapse
The two obvious things you can check are that you have stock recovery and that the phone is not rooted. Manually power on to bootloader (hold volume down and press power then use the volume keys to select recovery and press power. you should get a no command android screen if in stock recovery. assuming you don't have a Magisk icon, you are probably not rooted but you can confirm by installing and running a root app like root checker. likely, the previous owner did nothing but unlock the BL given how recently it came out, but if someone where really creative they could have done work in the other partition. there are no exploites, so doing it normally (running fastboot flashing unlock from a prompt) is pretty much all that would have been done other than enabling developer options and OEM unlocking in settings.
Personally, I think you have a good chance to learn your device, root (you need to be rooted for Magisk hide) and keep the bootloader unlocked. Besides rooting, being able to install a full factory image instead of an OTA is so much better in my opinion. The amount of work it would take to be 100% confident that the only thing done was the BL unlock would take as much work as at least getting a working knowledge of rooting and reinstalling the OS.
P.S. Keeping a phone "stock and rooted" has advantages. That is how I run my 3 XL and how I ran my OG XL. No custom OS. Not even a kernel.
coolhandz said:
If you live in Denver I'll trade you my Verizon one for yours. It has a locked bootloader.
Click to expand...
Click to collapse
lol, what I don't get is that I thought the google edition could have the bootloader unlocked in the developer options. So why go to this hassle of unlocking the bootloader from fastboot? FYI, in the Developer options the OEM unlocking is greyed out and says "Bootloader is already unlocked".
sliding_billy said:
The two obvious things you can check are that you have stock recovery and that the phone is not rooted. Manually power on to bootloader (hold volume down and press power then use the volume keys to select recovery and press power. you should get a no command android screen if in stock recovery. assuming you don't have a Magisk icon, you are probably not rooted but you can confirm by installing and running a root app like root checker. likely, the previous owner did nothing but unlock the BL given how recently it came out, but if someone where really creative they could have done work in the other partition. there are no exploites, so doing it normally (running fastboot flashing unlock from a prompt) is pretty much all that would have been done other than enabling developer options and OEM unlocking in settings.
Personally, I think you have a good chance to learn your device, root (you need to be rooted for Magisk hide) and keep the bootloader unlocked. Besides rooting, being able to install a full factory image instead of an OTA is so much better in my opinion. The amount of work it would take to be 100% confident that the only thing done was the BL unlock would take as much work as at least getting a working knowledge of rooting and reinstalling the OS.
P.S. Keeping a phone "stock and rooted" has advantages. That is how I run my 3 XL and how I ran my OG XL. No custom OS. Not even a kernel.
Click to expand...
Click to collapse
Thank you! Root Checker says that "root access is not properly installed on this device". The recovery mode screen just has a warning about the bootloader is unlocked and a link to a google help page. I figure that I can always unlock the bootloader again if I need to later, but for now I just want everything to work (bank and pay app) and not worry about updating anything myself. I think I may try fastboot to lock the bootloader for now. Thanks for all the help.
Hope it all works out for you. I assume you did a factory reset on the device since you got it used. Re-locking will do another factory reset.
sliding_billy said:
Hope it all works out for you. I assume you did a factory reset on the device since you got it used. Re-locking will do another factory reset.
Click to expand...
Click to collapse
Yeah, so I locked using "fastboot flashing lock" but then it doesn't start, saying that there is no operating system or something like that. I freaked out and was able to unlock again using "fastboot flashing unlock". Now all is wiped. I guess I need to flash the oem rom first, then lock. I'll have to do this all later tonight. Just glad that I didn't brick it yet.
eec007 said:
Thank you! Root Checker says that "root access is not properly installed on this device". The recovery mode screen just has a warning about the bootloader is unlocked and a link to a google help page. I figure that I can always unlock the bootloader again if I need to later, but for now I just want everything to work (bank and pay app) and not worry about updating anything myself. I think I may try fastboot to lock the bootloader for now. Thanks for all the help.
Click to expand...
Click to collapse
I haven't rooted or bl unlocked in some time now so if I make a mistake someone please correct me. After buying it from a 3rd party I'd wipe the device entirely. Download the correct image and install the latest platform tools for Windows (here) https://developer.android.com/studio/releases/platform-tools and make sure you can connect with adb devices and fastboot devices commands. Then extract the latest full image from here https://developers.google.com/android/images to your platform-tools directory and run the flashall.bat command if you wish to wipe the entire device and get rid of anything the previous owner might have "inadvertently" installed. (this is what I would do but not necessarily what you should do if you want to keep the current apps and system intact) This will reset your device and then you can lock the bootloader with no worry and you'll have a stock system.
I agree that since you can unlock it at any time and you don't need it now then relock it. But there are those here that disagree with me and fight with Magisk and OTAs constantly. But they are not noobs and know what they're doing. If you want to learn there is a wealth of information here so it's your call. Just my 2 cents. But please check my steps before you do anything that might cause issues.
edit: darn, sorry I just saw above that you already tried to lock it. I hope what I said to do will get you out of the predicament.
bobby janow said:
I haven't rooted or bl unlocked in some time now so if I make a mistake someone please correct me. After buying it from a 3rd party I'd wipe the device entirely. Download the correct image and install the latest platform tools for Windows (here) https://developer.android.com/studio/releases/platform-tools and make sure you can connect with adb devices and fastboot devices commands. Then extract the latest full image from here https://developers.google.com/android/images to your platform-tools directory and run the flashall.bat command if you wish to wipe the entire device and get rid of anything the previous owner might have "inadvertently" installed. (this is what I would do but not necessarily what you should do if you want to keep the current apps and system intact) This will reset your device and then you can lock the bootloader with no worry and you'll have a stock system.
I agree that since you can unlock it at any time and you don't need it now then relock it. But there are those here that disagree with me and fight with Magisk and OTAs constantly. But they are not noobs and know what they're doing. If you want to learn there is a wealth of information here so it's your call. Just my 2 cents. But please check my steps before you do anything that might cause issues.
edit: darn, sorry I just saw above that you already tried to lock it. I hope what I said to do will get you out of the predicament.
Click to expand...
Click to collapse
Your steps are basically what I will try tonight. Currently the phone is working again, so there was no harm done yet (just the restore of all apps and such). But I'm going to flash the oem image tonight and start all over again.
eec007 said:
Your steps are basically what I will try tonight. Currently the phone is working again, so there was no harm done yet (just the restore of all apps and such). But I'm going to flash the oem image tonight and start all over again.
Click to expand...
Click to collapse
One thing I would do before I relocked the bl would be to do the full login procedure, email everything other than apps. Then make sure you're on the Nov update in about phone, I'm sure you will be, and then fastboot relock the bl with the proper command. It will wipe the device again but it's a small price to pay for about 10 minutes of work. Then once it reboots and there is no more error message you'll be fully stock. Enable dev options again and make sure the oem switch is active allowing bl unlock. Then you're done. I've gotten to the point on my 5X where I even flip the oem switch so it can't be bl unlocked until I go in and flip it back. Dangerous if you're flashing stuff but not so much if you're just taking OTAs. That's of course your call entirely. Good luck.
eec007 said:
lol, what I don't get is that I thought the google edition could have the bootloader unlocked in the developer options. So why go to this hassle of unlocking the bootloader from fastboot? FYI, in the Developer options the OEM unlocking is greyed out and says "Bootloader is already unlocked".
Click to expand...
Click to collapse
That will stay grayed out until you relock the bootloader. That slider "allows" unlocking. Then you boot into fastboot and unlock it.
So you would reverse the process, hit fastboot and relock the bootloader. Then you can toggle the slider back to not allow unlocking.
Relocking the bootloader will wipe your phone.
You should not do this until you first flash the full factory image to make sure the phone is 100 percent stock. And if it were my phone I would wait for the next OTA update after flashing it back to stock to make sure it goes ok. Then lock it.
And then I would wait awhile before hitting the slider.
You are playing with fire here, if you mess it up and lock it and hit the slider you will not be able to fix it. And no offense, but since you have not done this all before on this phone chances are good you will mess it up.
So, flash to stock and leave it unlocked.
Then wait for the next OTA.
Then lock it.
Then wait a bit more before you hit the slider.
And remember, since you are not the original buyer you will not be able to warranty it.
eec007 said:
Hello, I purchased a Pixel 3 XL off craigslist and it is working fine, but the bootloader is unlocked therefore I am receiving a warning when restarting the phone and Google Pay does not work. How can I re-lock the bootloader? Do I need to flash the latest standard google image? The build number is: "crosshatch-userdebug 9 PQ1A.181105.013 5027108 dev-keys". When in bootloader the bootloader version is: b1c1-0.1-5004167. Obviously a n00b here, please be gentle. Thank you for any help.
Click to expand...
Click to collapse
They're right to mention that relocking a modified device can result in a brick.
Your best bet is to go to https://developers.google.com/android/images#taimen
Follow the directions to the "T", then relock it if you are really really sure that the unlock screen bothers you.
Would suggest to do this anyway, no matter future unlock status.
TonikJDK said:
That will stay grayed out until you relock the bootloader. That slider "allows" unlocking. Then you boot into fastboot and unlock it.
So you would reverse the process, hit fastboot and relock the bootloader. Then you can toggle the slider back to not allow unlocking.
Relocking the bootloader will wipe your phone.
You should not do this until you first flash the full factory image to make sure the phone is 100 percent stock. And if it were my phone I would wait for the next OTA update after flashing it back to stock to make sure it goes ok. Then lock it.
And then I would wait awhile before hitting the slider.
You are playing with fire here, if you mess it up and lock it and hit the slider you will not be able to fix it. And no offense, but since you have not done this all before on this phone chances are good you will mess it up.
So, flash to stock and leave it unlocked.
Then wait for the next OTA.
Then lock it.
Then wait a bit more before you hit the slider.
And remember, since you are not the original buyer you will not be able to warranty it.
Click to expand...
Click to collapse
I agree with most of your post other than waiting for the next OTA before you lock the bootloader. Why would he need to do that? If he's stock, and he'll see that immediately, then relock it. He doesn't want root or Magisk but only wants banking and Pay. With the slider allowing bl unlock he's in no danger whatsoever. Lock and relock whenever he wants. OTA will not disallow the slider once it's set.
TonikJDK said:
That will stay grayed out until you relock the bootloader. That slider "allows" unlocking. Then you boot into fastboot and unlock it.
So you would reverse the process, hit fastboot and relock the bootloader. Then you can toggle the slider back to not allow unlocking.
Relocking the bootloader will wipe your phone.
You should not do this until you first flash the full factory image to make sure the phone is 100 percent stock. And if it were my phone I would wait for the next OTA update after flashing it back to stock to make sure it goes ok. Then lock it.
And then I would wait awhile before hitting the slider.
You are playing with fire here, if you mess it up and lock it and hit the slider you will not be able to fix it. And no offense, but since you have not done this all before on this phone chances are good you will mess it up.
So, flash to stock and leave it unlocked.
Then wait for the next OTA.
Then lock it.
Then wait a bit more before you hit the slider.
And remember, since you are not the original buyer you will not be able to warranty it.
Click to expand...
Click to collapse
Thank you for explaining this. I had thought that the Developer Option slider was to unlock the bootloader, but your explanation clarifies it, the slider is to allow the bootloader to be unlocked...
Ok, so I tried to flash the factory image using adb flash-all and it keeps getting the error:
Sending sparse 'vendor_a' 2/2 (193888 KB) FAILED (Error reading sparse file)
Now the phone is not working at all and says that "device is corrupt" and will not boot past the white google screen. I can try again using adb, but it is the same error each time. I tried to download the image again and same sparse error. I can also fastboot in TWRP, but not sure what to do in there. What am I doing wrong? I guess I should've rooted and used Magisk like others have said.
turns out changing to a different cable resolved my sparse error and I was then successfully able to apply the factory image and lock the device. Thanks everyone for the help.

Downgrade back to Pie

I am on the official Android 10 firmware and would like to downgrade back to Pie. Is this possible without unlocking the bootloader? The T-Mobile unlock app apparently don't work on 10 yet so I need to get back to Pie to unlock then I can go back to 10.
Yes, I think you can. You can sideload an OTA image without unlocking the bootloader. Even though it says OTA, it is a full factory image. The files and directions are both available at that link. If possible, I would certainly do a full factory reset of your phone as soon as it booted however. You never want to back into an older version of Android without doing a full factory reset.
sic0048 said:
Yes, I think you can. You can sideload an OTA image without unlocking the bootloader. Even though it says OTA, it is a full factory image. The files and directions are both available at that link. If possible, I would certainly do a full factory reset of your phone as soon as it booted however. You never want to back into an older version of Android without doing a full factory reset.
Click to expand...
Click to collapse
Ok, I just tried that and part way through installation it aborted. "E:Failed to verify package compatibility" along with some other errors...
To revert to pie you have to use the full image and the platform tools available over at Goog but for this you need to unlock the bootloader. If you want to stay on a locked bootloader you then lock it after you're up on stock pie again. Keep in mind you'll want to do the works before you move any data back to the phone and that unlocking the bootloader will wipe the phone so you'll need to back up everything before you unlock.There are specific instructions for all of that and the images and tools at https://developers.google.com/android/images
Don't be afraid of unlocking the bootloader, it can be unlocked and locked again at your whim over and over. Doesn't hurt anything other than you get a wipe in the process.
krabman said:
To revert to pie you have to use the full image and the platform tools available over at Goog but for this you need to unlock the bootloader. If you want to stay on a locked bootloader you then lock it after you're up on stock pie again. Keep in mind you'll want to do the works before you move any data back to the phone and that unlocking the bootloader will wipe the phone so you'll need to back up everything before you unlock.There are specific instructions for all of that and the images and tools at https://developers.google.com/android/images
Don't be afraid of unlocking the bootloader, it can be unlocked and locked again at your whim over and over. Doesn't hurt anything other than you get a wipe in the process.
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Click to collapse
I cant unlock the boot loader because the phone is SIM locked to T-Mobile. This is the whole reason I want to go back to Pie so the unlock app will work. This sucks
You can get it sim unlocked by phone if you meet their unlock requirements, or at least you used to be able to do so, I did it that way there myself a few years ago. If that's not the case anymore then... yeah, you're in a pretty sucky spot.
krabman said:
You can get it sim unlocked by phone if you meet their unlock requirements, or at least you used to be able to do so, I did it that way there myself a few years ago. If that's not the case anymore then... yeah, you're in a pretty sucky spot.
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Click to collapse
I do meet their unlock requirements..They have a ticket open with engineering for over a week but I’ve found out from other means that the unlock app isn’t compatible with Android 10.
Do you mean there’s another way to SIM unlock then the app? If so please enlighten me.
"You can get it sim unlocked by phone..." You call them on the good old fashioned telephone and tell them you want to remove the sim lock. Customer service can do it without the app, to my knowledge this was possible as recently as the 6T; Tmo guys were calling up and getting it done in essentially the same scenario you're in.

Uninstalling Android R Preview

Hello everyone. I installed the developer preview for Android R and i'm over it. I wanna go back to stock and I tried sideloading the OTA image and I get this message
update package is older than the current build. Downgrade not allowed.
My bootloader is locked so I can't flash the image through fastboot. I need help.
May update released might want to try that one.
hedgehogmd said:
May update released might want to try that one.
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Click to collapse
I tried but it didn't work.
I was on the phone with t-mobile to see if they could unlock my phone but we're having issues with the unlock app.
I miss the days of typing in a code and getting your phone unlocked.
As you have just learned, the developer previews are not the same as beta releases. With the beta releases, you can "quit" the beta program and have the old OS version reinstalled via an OTA update The preview releases have no such OTA reset ability. Therefore, you should not participate in the preview releases unless your phone is unlocked.
If the May release doesn't let you revert back, then I think the only option you will have is to wait until the beta is released. Join the beta and have it installed on your phone and then quit the beat and hope that the OTA update takes you back to stock Android 10. In theory I think it will.
you should use the flashall.bat script if you're installing the factory image. Though this will earase data. Just make sure you have USB debugging on
EDIT: I think you should still be able to unlock your bootloader
EDIT2: After reading a bit more I see that on carrier specific devices, OEM unlocking is greyed out until the phone is sim unlocked. But after you get the app working everything should work fine. Did you use another sim thats not from T Mobile?
RicardoSal24 said:
you should use the flashall.bat script if you're installing the factory image. Though this will earase data. Just make sure you have USB debugging on
EDIT: I think you should still be able to unlock your bootloader
EDIT2: After reading a bit more I see that on carrier specific devices, OEM unlocking is greyed out until the phone is sim unlocked. But after you get the app working everything should work fine. Did you use another sim thats not from T Mobile?
Click to expand...
Click to collapse
I put a different sim on the phone and it worked but it's b/c I did the temporary unlock. After 30 days the phone will be locked again. The phone won't let me unlock the bootloader unless it's a permanent unlock. The problem is I'll have to wait 30 days for the phone to re-lock. I wish t-mobile could just give me a code...
Lucky for me this phone isn't my daily driver but I wanted to revert to stock android b/c I got an invite to test out the Ratio launcher by Blloc. It's incompatible with Android R.
chivamex10 said:
I put a different sim on the phone and it worked but it's b/c I did the temporary unlock. After 30 days the phone will be locked again. The phone won't let me unlock the bootloader unless it's a permanent unlock. The problem is I'll have to wait 30 days for the phone to re-lock. I wish t-mobile could just give me a code...
Lucky for me this phone isn't my daily driver but I wanted to revert to stock android b/c I got an invite to test out the Ratio launcher by Blloc. It's incompatible with Android R.
Click to expand...
Click to collapse
Your best bet would be to just wait until you can permanently unlock it. I got mine from best buy and only recently did I bother with flashing roms on it.
I have a TMO device and had a temp unlock, and obviously it doesn't allow oem unlocking to be enabled. I DM'd TMOhelp on twitter and was able to get a permanent unlock there. They told me that I'd have to wait for my temp unlock to expire before I could perm unlock, but I didn't. If you have trouble with the app, just clear the storage and cache data for it. Once it is actually perm unlocked you'll immediately get a notification and be prompted to restart the phone. After that you should see oem unlocking enabled in dev options and be able to hit bootloader and unlock it.

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