OTA update after flashing radio? - Nexus 6P Q&A, Help & Troubleshooting

Quick question.
I flashed the radio in my 6p.
Can I install the latest OTA Android update over that or do I need to go back to stock?
Also my phone is unlocked, does it need to be locked?
The radio flash didn't solve my problems.

Anyone?

Which radio did you flash?

2.50

Crakinarse said:
2.50
Click to expand...
Click to collapse
There's a lot about your config you haven't told us. Since you're staying your phone is "unlocked", I can only assume you mean the bootloader is unlocked, and you've got a custom recovery (TWRP) installed. If this is indeed the case, then no you should not take any "OTA" as any changes to "stock" (like a custom recovery) will cause it to fail.
You can, however, wipe and flash new Roms through twrp, or with an unlocked bootloader you can download the latest image from Google's sure for our device and flash that through fastboot (Google search to find tutorials on this there's a million of them). Be aware this will wipe EVERYTHING out on the device and reset it back to defaults (your data, recovery, etc.)

ohlin5 said:
There's a lot about your config you haven't told us. Since you're staying your phone is "unlocked", I can only assume you mean the bootloader is unlocked, and you've got a custom recovery (TWRP) installed. If this is indeed the case, then no you should not take any "OTA" as any changes to "stock" (like a custom recovery) will cause it to fail.
You can, however, wipe and flash new Roms through twrp, or with an unlocked bootloader you can download the latest image from Google's sure for our device and flash that through fastboot (Google search to find tutorials on this there's a million of them). Be aware this will wipe EVERYTHING out on the device and reset it back to defaults (your data, recovery, etc.)
Click to expand...
Click to collapse
All I did was unlock the bootloader and
fastboot flash radio image.
That is it.
I did not install a custom recovery.

Crakinarse said:
All I did was unlock the bootloader and
fastboot flash radio image.
That is it.
I did not install a custom recovery.
Click to expand...
Click to collapse
If you didn't flash a custom recovery you can download the ota without any issues. This is assuming that everything is still completely stock about your device. You can upgrade and downgrade your radio as you wish. I would advise to keep your bootloader unlocked so you can fix any problems if you ever have any.

Related

JB Xoom root and flash?

Hi all,
There is just to much info here and I cant find what I'm looking to do... tried other sites also but not the same.
I have in the UK a stock Wifi GED Jelly Bean Xoom.
I would like to flash a custom ROM.
Am I correct in thinking I need to:-
Root - still not found a guide that does JB
Install Clockwork Mod Recovery
Boot into recovery mode and select wipe... install from .zip within CMR?
Pointers would be greatly appreciated...
I think unlocking and rooting would be the same regardless of the OS.
I also suggest you flash TWRP instead of CWM, both are fine either way.
Once you boot into recovery wipe cashe, dalvik cache, and data (factory restore).
Then flash ROM and GAPPS (for the specific ROM).
Just make sure the ROM you flash is designed for your device (there are many flavors of XOOM, each a little different from the others).
Geeba said:
Root - still not found a guide that does JB
Click to expand...
Click to collapse
Irrelevant if you plan on using a custom rom.
1. unlock bootloader via fastboot - fastboot oem unlock
2. flash custom recovery via fastboot - fastboot flash recovery recovery.img
3. flash custom rom via the custom recovery you just flashed
Plenty of guides that go over this much.
Cubanluke88 said:
Irrelevant if you plan on using a custom rom.
1. unlock bootloader via fastboot - fastboot oem unlock
2. flash custom recovery via fastboot - fastboot flash recovery recovery.img
3. flash custom rom via the custom recovery you just flashed
Plenty of guides that go over this much.
Click to expand...
Click to collapse
Any pointers on what would cover a stock JB Wifi? - its all pretty bewildering if I'm honest.. I have no issues flashing my HD2 phone with Droid Clockwork Mod --> instal from zip... but the xoom doesnt appear to be that straightforward
Look at this guide that I came across. xoomforums.com/forum/motorola-xoom-development/15179-how-rookie-rooting-flashing-unrooting-under-one-roof.
Sorry it would not me post the link to the guide.
Just a thought..... Xooms sold in the UK do not have a JB update yet, so I would assume the Xoom may already have had its bootlaoder unlocked to convert it to a GED device and as part of that a custom revoery (like ClockworkMod) installed.
Is it worth trying to reboot into recovery to find out if you already have a Custom Recovery installed ? Might simplify the process somewhat......
I must admit, I've no idea what the stock recovery would look like though seeing as I GEDified my Xoom within a week of getting it

[Q] File recovery From Bootloop'ed Nexus 4

Hi,
I Need help .
I have nexus 4 with stock ROM and stock recovery.
Two days after OTA update to Lollipop, the phone got stuck on boot-loop.
The problem is that on the phone i have a very important voice recording of a cop that says he will lie in court.
The court time is coming and i need that recording!
Everywhere i looked, no one has an idea how to recover a boot-loop'ed phone.
The 2 options that people recommended are:
1. RE-Flash the ROM.
Maybe it wont delete the files.
2. Wipe everything and hope that the file is recoverable with one of the software's.
A. What do you recommend?
B. Did someone try any of the recovering software's with any luck of actually recovering?
Your bootloader is locked, correct?
ashyossi said:
Hi,
I Need help .
I have nexus 4 with stock ROM and stock recovery.
Two days after OTA update to Lollipop, the phone got stuck on boot-loop.
The problem is that on the phone i have a very important voice recording of a cop that says he will lie in court.
The court time is coming and i need that recording!
Everywhere i looked, no one has an idea how to recover a boot-loop'ed phone.
The 2 options that people recommended are:
1. RE-Flash the ROM.
Maybe it wont delete the files.
2. Wipe everything and hope that the file is recoverable with one of the software's.
A. What do you recommend?
B. Did someone try any of the recovering software's with any luck of actually recovering?
Click to expand...
Click to collapse
If your bootloader is unlocked you can try flashing TWRP recovery which has a built in file manager and mtp function to copy files to computer. You can also try to "dirty flash" another lollipop rom which will not wipe the data, but may not work.
Yeah, this is the only option, however, this can only happen if his bootloader is unlocked
lolcakes203 said:
Yeah, this is the only option, however, this can only happen if his bootloader is unlocked
Click to expand...
Click to collapse
unfortunately, the bootloader is locked.
what are the chances that "Dirty Flash" wont delete the files?
and what rom should i flash? the same build or maybe try to flash kitkat insted...?
ashyossi said:
unfortunately, the bootloader is locked.
what are the chances that "Dirty Flash" wont delete the files?
and what rom should i flash? the same build or maybe try to flash kitkat insted...?
Click to expand...
Click to collapse
Unfortunately, as far as I know you can't flash any Rom's while your bootloader is locked. You need either fastboot or a custom recovery to flash a custom ROM and both need an unlocked bootloader.
theminikiller said:
Unfortunately, as far as I know you can't flash any Rom's while your bootloader is locked. You need either fastboot or a custom recovery to flash a custom ROM and both need an unlocked bootloader.
Click to expand...
Click to collapse
and flushing the same STOCK rom that i got as OTA should work or does it only work with custom ROM's?
i've looked again.
seems that the bootloader is unlocked!
so, should i flash a TWRP recovery?
ashyossi said:
i've looked again.
seems that the bootloader is unlocked!
so, should i flash a TWRP recovery?
Click to expand...
Click to collapse
Yes, after you've flashed twrp you should be able to access your files from a computer if you're booted in recovery.
soooooo.....
i flashed the TWRP Recovery.
very easy. no errors.
and it shows as the storage is completely empty! as if someone in all this time wiped everything...
so now, what recovery software do you know/used/heard of?
ashyossi said:
soooooo.....
i flashed the TWRP Recovery.
very easy. no errors.
and it shows as the storage is completely empty! as if someone in all this time wiped everything...
so now, what recovery software do you know/used/heard of?
Click to expand...
Click to collapse
When the storage is completely empty, are you booted in recovery, the bootloader or just trying to boot normally? When you say it's empty, do you actually see the device on your computer? If so, is it completely empty with no folders or files or anything, or just stock stuff?
Can you check mount and make sure all the storage volumes are mounted? It's usually blank when they are all manually unmounted.

WiFI wont work after root

I should start this off by saying that i have no idea how to root a device and i am now currently aware of how stupid my actions were.
I've searched the forums for about 2 hours now and i've yet to find a solution to this problem which is stressing me out like you wouldn't believe.
about i year ago i tried to root my Moto X Pure edition but i failed miserably so i returned to stock and lived without. This morning i decided i would try to root again but it isn't going so well.
I followed this guide: http://forum.xda-developers.com/moto-x-style/general/root-moto-x-style-xt1572-br-marshmallow-t3259380 And everything worked fine until i noticed that my wifi wasn't working.
I then decided to flash back to the original boot image which i found from this site: http://androiding.how/systemless-root-moto-x-style-marshmallow-mph24-49-18/ But my wifi still refuses to turn back on
By now I'm a bit stressed out and not thinking straight. I then recalled that device encryption can screw with the rooting process so i decided to factory reset (how stupid can i get.)
So now im sitting at the welcome screen and my XT1575 cant find a wifi network so im going to have to restore my device over cellular data.
What do i do!?!?!?!?!!?!?
EDIT: i just realized the first link i posted was for the XT1572. I feel so stupid. how do i restore original functionality to my device?
I have had this issue before but on a Moto X Style (XT1572). You need to flash the modem again through fastboot/ADB. You first need to download the full stock firmware and extract it on a PC. Reboot your phone into bootloader mode and run the following command through command prompt/terminal:
fastboot flash modem NON-HLOS.bin
fastboot erase modemst1
fastboot erase modemst2
You may need to do this twice as it doesn't work always first time. Refer to this post for more information:
http://forum.xda-developers.com/moto-x-style/development/pure-firmware-tuff-wip-t3224833
HTH,
Ooms
dj_ooms said:
I have had this issue before but on a Moto X Style (XT1572). You need to flash the modem again through fastboot/ADB. You first need to download the full stock firmware and extract it on a PC. Reboot your phone into bootloader mode and run the following command through command prompt/terminal:
fastboot flash modem NON-HLOS.bin
fastboot erase modemst1
fastboot erase modemst2
You may need to do this twice as it doesn't work always first time. Refer to this post for more information:
http://forum.xda-developers.com/moto-x-style/development/pure-firmware-tuff-wip-t3224833
HTH,
Ooms
Click to expand...
Click to collapse
I've learned a lot in the past two hours. I did try to reflash the modem multiple times with multiple different files without any success. I don't think the method i was following works for XT1575 specifically.
I am currently back on stock with wifi working. I like the idea of a systemless root, but i couldn't find a method that works for the Pure. So i guess i will continue to run stock until i get a new phone (that might be a while.)
UC_Nightmare said:
I've learned a lot in the past two hours. I did try to reflash the modem multiple times with multiple different files without any success. I don't think the method i was following works for XT1575 specifically.
I am currently back on stock with wifi working. I like the idea of a systemless root, but i couldn't find a method that works for the Pure. So i guess i will continue to run stock until i get a new phone (that might be a while.)
Click to expand...
Click to collapse
Glad you managed to sort out your WiFi.
If you are on stock ROM but have tried root, it means you already have an unlocked bootloader. You could always try and flash TWRP and then flash a pre-rooted stock ROM from here:
[ROM] Flashable Stock/Rooted X1575 6.0 MPHS24.49-18-4 (May security update)
This will give you what you are after minus the stock recovery. You could then just reflash the stock recovery using fastboot/ADB:
fastboot flash recovery recovery.img
Click to expand...
Click to collapse
Just download the full stock of the firmware version you flashed through TWRP and then extract and flash the respective version recovery from here:
[FiRMWARE] XT1575 PuRE FiRMWARE aNd STuFF
You should then be completely stock with root.
I tried systemless root on my XT1572 and didn't get on with it. Kept having issues so just went with full root and am happy with my phone as it is; stock 6.0.1 with full root and a few stock apps removed that I don't use/need.
HTH,
Ooms
dj_ooms said:
Glad you managed to sort out your WiFi.
If you are on stock ROM but have tried root, it means you already have an unlocked bootloader. You could always try and flash TWRP and then flash a pre-rooted stock ROM from here:
[ROM] Flashable Stock/Rooted X1575 6.0 MPHS24.49-18-4 (May security update)
This will give you what you are after minus the stock recovery. You could then just reflash the stock recovery using fastboot/ADB:
Just download the full stock of the firmware version you flashed through TWRP and then extract and flash the respective version recovery from here:
[FiRMWARE] XT1575 PuRE FiRMWARE aNd STuFF
You should then be completely stock with root.
I tried systemless root on my XT1572 and didn't get on with it. Kept having issues so just went with full root and am happy with my phone as it is; stock 6.0.1 with full root and a few stock apps removed that I don't use/need.
HTH,
Ooms
Click to expand...
Click to collapse
Thanks for the suggestion. Before I try rooting again though, is there a way to completely backup my phone to my computer without using twrp? its a pain logging into all my app and setting everything up every time i try to root my phone.
UC_Nightmare said:
Thanks for the suggestion. Before I try rooting again though, is there a way to completely backup my phone to my computer without using twrp? its a pain logging into all my app and setting everything up every time i try to root my phone.
Click to expand...
Click to collapse
The only app I am aware of without root is Helium. I haven't tried it personally but I think you need to have an app running on your PC and the phone connected to it. I personally use TWRP with Nandroid Manager and Titanium Backup. These both need root though. You could always make a backup through TWRP prior to flashing the pre-rooted ROM, then flash the ROM as always recommended. If you run into issues, just restore the backup through TWRP, then flash the stock recovery back through fastboot/ADB to be backup to your original state.
HTH,
Ooms
dj_ooms said:
Glad you managed to sort out your WiFi.
If you are on stock ROM but have tried root, it means you already have an unlocked bootloader. You could always try and flash TWRP and then flash a pre-rooted stock ROM from here:
[ROM] Flashable Stock/Rooted X1575 6.0 MPHS24.49-18-4 (May security update)
This will give you what you are after minus the stock recovery. You could then just reflash the stock recovery using fastboot/ADB:
Just download the full stock of the firmware version you flashed through TWRP and then extract and flash the respective version recovery from here:
[FiRMWARE] XT1575 PuRE FiRMWARE aNd STuFF
You should then be completely stock with root.
I tried systemless root on my XT1572 and didn't get on with it. Kept having issues so just went with full root and am happy with my phone as it is; stock 6.0.1 with full root and a few stock apps removed that I don't use/need.
HTH,
Ooms
Click to expand...
Click to collapse
Maybe i am missing something but why would i want to flash stock recovery after i flash for example "XT1575 Rooted 6.0 Odexed with May security update" from the first link you provided?
UC_Nightmare said:
Maybe i am missing something but why would i want to flash stock recovery after i flash for example "XT1575 Rooted 6.0 Odexed with May security update" from the first link you provided?
Click to expand...
Click to collapse
I think i can answer my own question now. TWRP is a "custom recovery" and after i use TWRP i can flash something over it so that i can be stock. The terminology around these parts is quite confusing
i've gone and ****ed everything up again. I flashed twrp and then tried to install a zip from the first link you provided but my phone refused to unlock
I did a factory reset from within twrp and reinstalled the zip but now my wifi isnt working again.
Is rooting always such a pain in the ass?
UC_Nightmare said:
i've gone and ****ed everything up again. I flashed twrp and then tried to install a zip from the first link you provided but my phone refused to unlock
I did a factory reset from within twrp and reinstalled the zip but now my wifi isnt working again.
Is rooting always such a pain in the ass?
Click to expand...
Click to collapse
When rooting, there is always a risk. I have been flashing phones for over 10 years and it is always a learning experience. Even now i have occasionally done something and thought I've completely mucked up my phone. You just need to make sure you follow exactly what is stated as the procedure and if you run into problems, there is always someone at hand to help in this great forum.
Out of curiosity, did you follow the standard procedure for installing a new ROM? You will lose all data doing the standard procedure but can restore most stuff from your Nandroid backup. The steps I always do is:
1. Make a backup
2. Wipe data, system, dalvik/art and cache partitions
3. Flash your ROM
4. Wipe dalvik/art and cache again
5. Reboot
Click to expand...
Click to collapse
That is the standard recommended procedure for flashing all ROMs in TWRP. I have an EU XT1572 and have successfully used this ROM on my phone. The ROM contains everything you need including the modem. The modem is for the US XT1575 but worked fine on my phone. For sanities sake, I flashed the EU modem after and still had everything working.
Just another point, your phone needs to have been updated to Marshmallow before you can run one of these ROMs. If you are on Lollipop you may run into issues, especially from a radios perspective.
Another thing to point out is that all ROMs are started that you flash at your own risk. Developers will not be held responsible for anything going wrong. As long as you follow the guides and don't flash a ROM for a completely different device, you shouldn't run into any issues and more often then not can bring your phone back to a functional state if you do.
HTH,
Ooms
Flash twrp
Make backup
Flash su 2.62-3
Done.
Or...
1. Flash the factory image
2. Flash TWRP
3. Flash this attachment in TWRP, which will force install SuperSU 2.78 SR-1 systemless-ly. I've shared and posted about it before in this thread.
Nothing's changed with the attached zip here, except it has the latest version of SuperSU included as of this post.

OTA updates with Unlocked Bootloader

Hello,
after I've unlocked the bootloader can I still get OTA updates?
I'll just be on stock ROM with root. I also make a backup with nothing on except TWRP.
Lets hope so
LanceM said:
Lets hope so
Click to expand...
Click to collapse
have you tried it?
Yes you'll be able to get new updates with unlock bootloader.
DrakenFX said:
Yes you'll be able to get new updates with unlock bootloader.
Click to expand...
Click to collapse
Can you elaborate on this? The last I heard unlocking the bootloader (using the official procedure) stops OTA. Has this changed ?
mh127 said:
Can you elaborate on this? The last I heard unlocking the bootloader (using the official procedure) stops OTA. Has this changed ?
Click to expand...
Click to collapse
I never said Official getting OTA's , but i believe this is going to change staring with the new Unlock Bootloader procedure.
DrakenFX said:
I never said Official getting OTA's , but i believe this is going to change staring with the new Unlock Bootloader procedure.
Click to expand...
Click to collapse
OK, but AFAIK even with the unofficial unlock (with TWRP and root) the OTA will fail - unless you unroot and go back to locked stock bootloader. Correct me if I am wrong.
mh127 said:
OK, but AFAIK even with the unofficial unlock (with TWRP and root) the OTA will fail - unless you unroot and go back to locked stock bootloader. Correct me if I am wrong.
Click to expand...
Click to collapse
In my experience, what makes the difference - so far - is the recovery. Official ZTE updates and ROMS only flash through the stock recovery.
Unlocked bootloader has made no difference to me.
mh127 said:
OK, but AFAIK even with the unofficial unlock (with TWRP and root) the OTA will fail - unless you unroot and go back to locked stock bootloader. Correct me if I am wrong.
Click to expand...
Click to collapse
If you try to flash Official OTA yes will fail, cuz isn't modded to skip partitions check.
DrakenFX said:
If you try to flash Official OTA yes will fail, cuz isn't modded to skip partitions check.
Click to expand...
Click to collapse
This is getting confusing. "Getting OTA updates" (as OP asks) usually means that the update installs "on its own" by tapping notification rather than flashing via recovery, which is a bit more complicated process.
So back to the OP question: With root and TWRP can one get over-the-air official updates from ZTE without going to the recovery manually? I believe the answer to that is NO.
That said, there is probably a work around in getting the update, probably by manually flashing partitions that have changed in the update.
Is this right?
mh127 said:
This is getting confusing. "Getting OTA updates" (as OP asks) usually means that the update installs "on its own" by tapping notification rather than flashing via recovery, which is a bit more complicated process.
So back to the OP question: With root and TWRP can one get over-the-air official updates from ZTE without going to the recovery manually? I believe the answer to that is NO.
That said, there is probably a work around in getting the update, probably by manually flashing partitions that have changed in the update.
Is this right?
Click to expand...
Click to collapse
Well OPs Question actually was if OTA Updates are possible with unlocked boot-loader...
Root and TWRP is a whole different scenario and won't work with OTA for sure as OTA needs stock recovery and will check for unmodified system (not rooted)...
But if you are on stock with unlocked bootloader you should get notified about OTAs (as until now it did not check for bootloader lock status, but that could change in future) although I don't know if it will install correctly
Gachmuret said:
Well OPs Question actually was if OTA Updates are possible with unlocked boot-loader...
Root and TWRP is a whole different scenario and won't work with OTA for sure as OTA needs stock recovery and will check for unmodified system (not rooted)...
But if you are on stock with unlocked bootloader you should get notified about OTAs (as until now it did not check for bootloader lock status, but that could change in future) although I don't know if it will install correctly
Click to expand...
Click to collapse
OP mentioned that he used TWRP to make a backup, I assumed he has replaced stock recovery with TWRP, but that may not necessarily be the case.
If your device has an bootloader that was unlocked "unofficially" (either via sideloading the official unlock method or DrakenFX & Unjustifieddev's method), but is still completely stock (stock System, stock Boot, stock Recovery, stock everything besides the unlocked bootloader), you can still receive and apply OTAs. However, if you changed any of the partitions, like boot.img (root), recovery.img (TWRP), system.img (changes to system), you will still receive the OTA, but you won't be able to apply it, the update will fail. If you went through the official bootloader unlocking process, which involved you submitting a form to ZTE with your device's IMEI, you would no longer be able to receive OTAs.
What I did was sideload the official B20_Boot on by B20 device, unlocked my bootloader, flashed TWRP, flashed the TWRP Stock B20 dumps that were posted here on XDA, and reflashed stock recovery. This made my device completely stock B20 besides the unlocked bootloader. I then applied the official B27 OTA update, and it installed fine. I then reflashed TWRP (since my bootloader was still unlocked) and re-rooted my device.
If a new update comes out, I can just reflash the stock B27 TWRP dump posted here on XDA, reflash stock recovery, (if needed, reflash stock fastboot), and apply OTA.
xtermmin said:
...
What I did was sideload the official B20_Boot on by B20 device, unlocked my bootloader, flashed TWRP, flashed the TWRP Stock B20 dumps that were posted here on XDA, and reflashed stock recovery. This made my device completely stock B20 besides the unlocked bootloader. I then applied the official B27 OTA update, and it installed fine. I then reflashed TWRP (since my bootloader was still unlocked) and re-rooted my device.
If a new update comes out, I can just reflash the stock B27 TWRP dump posted here on XDA, reflash stock recovery, (if needed, reflash stock fastboot), and apply OTA.
Click to expand...
Click to collapse
So, with this procedure, do you lose all the app installations/other customizations? I believe that all of the application data is on a non-system partition (/data?) but did you need to go through all of the setting up of the phone after you did the upgrade this way?
rayman2k1 said:
So, with this procedure, do you lose all the app installations/other customizations? I believe that all of the application data is on a non-system partition (/data?) but did you need to go through all of the setting up of the phone after you did the upgrade this way?
Click to expand...
Click to collapse
Yes. Unlocking the bootloader does a factory reset, and doing a TWRP restore of a stock image (which overwrites your current partitions) overwrites what you had before.
EDIT: Actually, I think Internal Storage gets erased as well, but your microSD card will be fine.
xtermmin said:
Yes. Unlocking the bootloader does a factory reset, and doing a TWRP restore of a stock image (which overwrites your current partitions) overwrites what you had before.
EDIT: Actually, I think Internal Storage gets erased as well, but your microSD card will be fine.
Click to expand...
Click to collapse
Hmm, had guessed as much. I knew the bootloader unlocking did a wipe, but was hoping that recovery-flashing would do a backup/restore, as if the update had been applied through the in-ROM update procedure. Unless the OTA process only gets deltas and flashes them, leaving fs intact.
rayman2k1 said:
Hmm, had guessed as much. I knew the bootloader unlocking did a wipe, but was hoping that recovery-flashing would do a backup/restore, as if the update had been applied through the in-ROM update procedure. Unless the OTA process only gets deltas and flashes them, leaving fs intact.
Click to expand...
Click to collapse
Yeah, the OTA doesn't straight-up replace partitions, it checks and patches the existing partitions, so if a partition has been changed, the OTA install will fail.

Is it OK to clean flash Factory Image in TWRP?

I want to make a clean Install of factory image (Android 8.0 Oct) on my Nexus 6P with TWRP.
Should wipe Dalvik, Data, System and Internal storage, then move the stock zip file (That I downloaded from google's web) from my computer to my phone and just install in TWRP? Will it work?
Device is unrooted, only has an open boot loader, I just want to make a clean install of Android 8.0
If you wipe your internal all your downloads and your factory image are gone.
Sure you can flash the unpacked *.img with twrp, but don't try to flash the bootloader or radio with twrp.
If you really want a clean start and wipe everything, then you should flash the factory image with fastboot. This will update your bootloader and radio too.
coremania said:
If you wipe your internal all your downloads and your factory image are gone.
Sure you can flash the unpacked *.img with twrp, but don't try to flash the bootloader or radio with twrp.
If you really want a clean start and wipe everything, then you should flash the factory image with fastboot. This will update your bootloader and radio too.
Click to expand...
Click to collapse
Hi coremania, I have a few questions towards this method.
1. If the stock image is stored in either external SD card OR USB OTG, even then will there be any problem installing the the stock rom back using TWRP?
2. If the boot loader is unlocked, should one has to re-lock it first before reinstalling the stock rom either thru' TWRP or thru' Fasboot commands?. and finally,
3. Is it not advisable to flash the stock rom from the full factory image using TWRP rather than Fastboot?
(As I think it is easier to flash thru TWRP than typing those ADB commands in Fastboot).
Thank you for your inputs.
AndroMani said:
Hi coremania, I have a few questions towards this method.
1. If the stock image is stored in either external SD card OR USB OTG, even then will there be any problem installing the the stock rom back using TWRP?
2. If the boot loader is unlocked, should one has to re-lock it first before reinstalling the stock rom either thru' TWRP or thru' Fasboot commands?. and finally,
3. Is it not advisable to flash the stock rom from the full factory image using TWRP rather than Fastboot?
(As I think it is easier to flash thru TWRP than typing those ADB commands in Fastboot).
Thank you for your inputs.
Click to expand...
Click to collapse
If you decide to flash and test some stuff the bootloader should be always unlocked. If anything will went wrong and your bootloader is locked you're mostly f***ed. Never relock your bootloader until you want to sell your device.
I mostly use flashfire to flash stock and custom roms, TWRP is ok too, but it's easier to keep root and TWRP with flashfire by flashing stock images. Do not flash bootloader and radio with flashfire, never ever !!! There are TWRP flashable zips for bootloader and radio here on XDA, you only should use these with TWRP, but the safe way for bootloader and radio is fastboot for sure. Fastboot is the safest way for flashing stock,
but not absolutely necessary, you have to decide this for yourself.
Edit: to your first question, I never flashed with USB otg on the n6p, but I think yes it should be fine.
I hope someone here can help answer this question. I also want to flash factory image version 8.1.0 on my nexus 6P. But somehow my phone is not recognized by any computers I tried to plug it in. When I plug in the usb cable to the phone, it doesn't pop up the usb notification to choose MTP for file transfer. Then I try with Developer tab in Settings to choose it manually (USB debugging is enable) but it still doesn't work. My laptop has been updated with android usb drivers and other stuffs. I have a second phone (Oneplus 1) and it's recognized by my laptop the moment I plug it in. Please suggest any solutions to fix this. Thanks everyone.
sinjok said:
I hope someone here can help answer this question. I also want to flash factory image version 8.1.0 on my nexus 6P. But somehow my phone is not recognized by any computers I tried to plug it in. When I plug in the usb cable to the phone, it doesn't pop up the usb notification to choose MTP for file transfer. Then I try with Developer tab in Settings to choose it manually (USB debugging is enable) but it still doesn't work. My laptop has been updated with android usb drivers and other stuffs. I have a second phone (Oneplus 1) and it's recognized by my laptop the moment I plug it in. Please suggest any solutions to fix this. Thanks everyone.
Click to expand...
Click to collapse
Check your cable, or try a different with different port.
In the Dev options you can reset the debugging options, i guess a reboot is necessary afterwards.
coremania said:
If you decide to flash and test some stuff the bootloader should be always unlocked. If anything will went wrong and your bootloader is locked you're mostly f***ed. Never relock your bootloader until you want to sell your device.
I mostly use flashfire to flash stock and custom roms, TWRP is ok too, but it's easier to keep root and TWRP with flashfire by flashing stock images. Do not flash bootloader and radio with flashfire, never ever !!! There are TWRP flashable zips for bootloader and radio here on XDA, you only should use these with TWRP, but the safe way for bootloader and radio is fastboot for sure. Fastboot is the safest way for flashing stock,
but not absolutely necessary, you have to decide this for yourself.
Edit: to your first question, I never flashed with USB otg on the n6p, but I think yes it should be fine.
Click to expand...
Click to collapse
Thank you for the clarification. So, far I have not faced a situation to flash my custom recovery either thru' TWRP or thru Fastboot. Instead, I am using my Nandroid backups taken from TWRP and using it to restore my system after I try a custom rom OR upgrade my system with the latest Magisk version for a systemless root. So far there are no issues. But, I wanted to be aware of the methods to go back to stock (without any user installed apps/data) if need be. I read in some forums that we need to re-lock the unlocked bootloader if we want to go back to stock rom using fastboot. Otherwise, the system will not be installed alright and might cause a bootloop.
That's why I wanted to clarify.
Thanks again for your inputs.
AndroMani said:
Thank you for the clarification. So, far I have not faced a situation to flash my custom recovery either thru' TWRP or thru Fastboot. Instead, I am using my Nandroid backups taken from TWRP and using it to restore my system after I try a custom rom OR upgrade my system with the latest Magisk version for a systemless root. So far there are no issues. But, I wanted to be aware of the methods to go back to stock (without any user installed apps/data) if need be. I read in some forums that we need to re-lock the unlocked bootloader if we want to go back to stock rom using fastboot. Otherwise, the system will not be installed alright and might cause a bootloop.
That's why I wanted to clarify.
Thanks again for your inputs.
Click to expand...
Click to collapse
You don't need to ever relock your bootloader. If you want to try stock and use TWRP try SuperXe 8.1. It's just flaahable stock with some extras you can opt out of your not intereseted.
AndroMani said:
Thank you for the clarification. So, far I have not faced a situation to flash my custom recovery either thru' TWRP or thru Fastboot. Instead, I am using my Nandroid backups taken from TWRP and using it to restore my system after I try a custom rom OR upgrade my system with the latest Magisk version for a systemless root. So far there are no issues. But, I wanted to be aware of the methods to go back to stock (without any user installed apps/data) if need be. I read in some forums that we need to re-lock the unlocked bootloader if we want to go back to stock rom using fastboot. Otherwise, the system will not be installed alright and might cause a bootloop.
That's why I wanted to clarify.
Thanks again for your inputs.
Click to expand...
Click to collapse
I can't confirm the relock and unlock method to go back to stock. Senseless to me.

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