Database Users

[Q] Any harm re-locking bootloader after install

New Nexus 7 wifi. I've unlocked bootloader, rooted, new recovery, new 4.2.2 ROM.
I notice on some of the toolkits I'm able to re-lock bootloader. Assuming I'm not returning it to stock, is there any advantage to doing this?

harry_fine said:
New Nexus 7 wifi. I've unlocked bootloader, rooted, new recovery, new 4.2.2 ROM.
I notice on some of the toolkits I'm able to re-lock bootloader. Assuming I'm not returning it to stock, is there any advantage to doing this?
Click to expand...
Click to collapse
Any advantage to relocking it I would say no.. I believe I remember reading (and i could be totally wrong here) that there is a counter that gets changed when you unlock it.. I would guess so they could deny you warranty if they wanted even if you flashed back to stock and relocked it they would know. But I unlocked mine 15 minutes after opening it up and flashed TWRP with fastboot then installed a new rom and faux kernel and relocked mine just to see if it wouldn't run the non stock recovery or a non stock rom and kernel.. it still did. I leave it unlocked.. im thinking the whole locking thing is just a warranty scare tactic

And if you relock the bootloader, you won't be able to use fastboot anymore...

Nico_60 said:
And if you relock the bootloader, you won't be able to use fastboot anymore...
Click to expand...
Click to collapse
Extremely untrue. You can use fastboot all day long to flash stock roms, recoveries and such with a locked bootloader. That is the entire purpose of fastboot. You just cant flash custom recoveries, custom roms and such. Fastboot itself it completely intact and useable. It is the Nexus stock flashing tool. That is how you UNLOCK the bootloader in the first place. Even if you use a toolkit, it is merely a gui that is still utilizing fastboot for you in the background.
Sent from my Nexus 7 using xda premium

rebel1699 said:
Extremely untrue. You can use fastboot all day long to flash stock roms, recoveries and such with a locked bootloader. That is the entire purpose of fastboot. You just cant flash custom recoveries, custom roms and such. Fastboot itself it completely intact and useable. It is the Nexus stock flashing tool. That is how you UNLOCK the bootloader in the first place. Even if you use a toolkit, it is merely a gui that is still utilizing fastboot for you in the background.
Sent from my Nexus 7 using xda premium
Click to expand...
Click to collapse
sorry, it's true I have not precised this

DaMadOne said:
Any advantage to relocking it I would say no.. I believe I remember reading (and i could be totally wrong here) that there is a counter that gets changed when you unlock it.. I would guess so they could deny you warranty if they wanted even if you flashed back to stock and relocked it they would know. But I unlocked mine 15 minutes after opening it up and flashed TWRP with fastboot then installed a new rom and faux kernel and relocked mine just to see if it wouldn't run the non stock recovery or a non stock rom and kernel.. it still did. I leave it unlocked.. im thinking the whole locking thing is just a warranty scare tactic
Click to expand...
Click to collapse
Same, I unlocked mine the moment I got it. Also the lock isn't really a warranty scare tactic but rather a security feature, with it locked (which can only be unlocked via fastboot anyways) would prevent the system from replacing the components such as system, recovery or bootloader that wasn't officially signed.
It's also a way for warranty to only be applied to software or components that they are actually responsible for, since damage caused by something they don't make wouldn't be covered anyways.
Also even if you did have it unlocked, and the device was suffering from a hardware-based manufacture defect, it would still be covered under warranty, even if they deny you at first, would just have to push the nature of the defect. (And besides, far as Nexus devices go, would seem as if they were sold to be tinkered with).

rebel1699 said:
Extremely untrue. You can use fastboot all day long to flash stock roms, recoveries and such with a locked bootloader. That is the entire purpose of fastboot. You just cant flash custom recoveries, custom roms and such. Fastboot itself it completely intact and useable. It is the Nexus stock flashing tool. That is how you UNLOCK the bootloader in the first place. Even if you use a toolkit, it is merely a gui that is still utilizing fastboot for you in the background.
Sent from my Nexus 7 using xda premium
Click to expand...
Click to collapse
what about Locking Bootloader on MultiROM ?!?!?!

Nexus 6P on boot loop after an OTA update

Hi There,
My colleague complained that he had an OTA update on his Nexus 6P and the after the update it was stuck in a boot loop where the Google logo keep on displaying.
When he bought back, he had showed it a shop already which they said they couldn't fix. However, the phone was later given to me for help and I have somehow manage to connect the device on fastboot and adb. Tried all the possible options such as unlocking the bootloader, loading .img's one by one... sideloading... etc.
No matter what I do, it keeps on doing the same boot loop. And when I leave the bootloader unlocked, it gives an error at first, then again goes back to the same.
Not sure whether what I am doing wrong or whether am I choosing the wrong build or so... would anyone care to advise?

.G33K said:
Hi There,
My colleague complained that he had an OTA update on his Nexus 6P and the after the update it was stuck in a boot loop where the Google logo keep on displaying.
When he bought back, he had showed it a shop already which they said they couldn't fix. However, the phone was later given to me for help and I have somehow manage to connect the device on fastboot and adb. Tried all the possible options such as unlocking the bootloader, loading .img's one by one... sideloading... etc.
No matter what I do, it keeps on doing the same boot loop. And when I leave the bootloader unlocked, it gives an error at first, then again goes back to the same.
Not sure whether what I am doing wrong or whether am I choosing the wrong build or so... would anyone care to advise?
Click to expand...
Click to collapse
So the bootloader is unlocked? Exactly which build have you attempted to flash with fastboot? Have you tried flashing one of the full OTA zips with the stock recovery?
PS. Whatever you do don't lock the bootloader. And don't worry about the warning you get with the bootloader unlocked, that's normal.

Heisenberg said:
So the bootloader is unlocked? Exactly which build have you attempted to flash with fastboot? Have you tried flashing one of the full OTA zips with the stock recovery?
PS. Whatever you do don't lock the bootloader. And don't worry about the warning you get with the bootloader unlocked, that's normal.
Click to expand...
Click to collapse
Thank you for the reply.. I have only locked the bootloader when I'm done with flashing... etc as it was giving me error. Regardless of the bootloader state, it kept on going through the bootloop like it didn't care.
I tried to flashing the factory image which is MTC19T and also tried the OTA which is MTC19V as said in here.
Still there's not luck!

.G33K said:
Thank you for the reply.. I have only locked the bootloader when I'm done with flashing... etc as it was giving me error. Regardless of the bootloader state, it kept on going through the bootloop like it didn't care.
I tried to flashing the factory image which is MTC19T and also tried the OTA which is MTC19V as said in here.
Still there's not luck!
Click to expand...
Click to collapse
Don't worry about the warning and definitely don't lock the bootloader because if it gets stuck locked you'll really be screwed. Go to my guide here:
http://forum.xda-developers.com/nexus-6p/general/guides-how-to-guides-beginners-t3206928
Follow the instructions in section 10 (use the latest MTC19X build). Skip the part at the beginning about performing a factory reset because you can't actually get the phone to boot to do that. Make sure you include the "fastboot format userdata" command at the end (this will erase all data on the device). Leave the bootloader unlocked.

Heisenberg said:
Don't worry about the warning and definitely don't lock the bootloader because if it gets stuck locked you'll really be screwed. Go to my guide here:
http://forum.xda-developers.com/nexus-6p/general/guides-how-to-guides-beginners-t3206928
Follow the instructions in section 10 (use the latest MTC19X build). Skip the part at the beginning about performing a factory reset because you can't actually get the phone to boot to do that. Make sure you include the "fastboot format userdata" command at the end (this will erase all data on the device). Leave the bootloader unlocked.
Click to expand...
Click to collapse
I have actually tried doing what section 10 says but with a different stock build.. Does that effect as well? However, let me give another shot with your said build and post back.

.G33K said:
I have actually tried doing what section 10 says but with a different stock build.. Does that effect as well? However, let me give another shot with your said build and post back.
Click to expand...
Click to collapse
Did you format userdata? It's worth a try.

Heisenberg said:
Did you format userdata? It's worth a try.
Click to expand...
Click to collapse
Yes, sire! I did all the possible things I could do without harming or bricking the device... Read each and every instruction carefully to do... but turned with no luck... however, I'm due to try the method and build you have suggested, I shall try that and get back to you!

.G33K said:
Yes, sire! I did all the possible things I could do without harming or bricking the device... Read each and every instruction carefully to do... but turned with no luck... however, I'm due to try the method and build you have suggested, I shall try that and get back to you!
Click to expand...
Click to collapse
It probably won't work, any build should work, but it's worth a try. If that fails I can only suggest flashing TWRP recovery and trying to flash a custom ROM to see if that works.

So long as you have the bootloader.img and radio.img files, you can try to format boot as well, however Heisenberg may yell at me for even typing that
I had a similar issue - bootloop, but it was getting to the boot animation for about 3 seconds, then rebooting. When I formatted all the areas before flashing them from the stock image, it allowed me to boot up as normal. Stable ever since.

Hi There,
Coming back to the issue, I have just downloaded the build that was suggested by "Heisenberg" and tried it. It was still the same, as in the Google logo keep on flashing but the android bot just appeared once with the logo. But still there not luck as the device stays with Google logo but does nothing.
However, I'm able to see the device on fastboot. Nevertheless, I cannot seem to use adb command.. it doesn't even list on devices. Does that mean the adb isn't working?
Meanwhile, all my fastboot commands are working with no issues at all.
EDIT: When I tried the TWRP recovery, I can flash the recover, but I can seem to go to the recovery window at all as the device keep on showing "The device software can't be checked for corruption". When I pass that also the same boot loop.

I too am having the bootloop issue on my stock Nexus 6P. Is there a way to unlock the device from the bootloader? I'm unable to carry out step one on Heisenberg's guide because I'm unable to actually boot up my phone past the Google logo. Am I pretty much screwed?

bcjk8210 said:
I too am having the bootloop issue on my stock Nexus 6P. Is there a way to unlock the device from the bootloader? I'm unable to carry out step one on Heisenberg's guide because I'm unable to actually boot up my phone past the Google logo. Am I pretty much screwed?
Click to expand...
Click to collapse
Unfortunately yes. Unless you enabled OEM Unlocking in the developers menu before your phone went sideways you probably have a hard bricked phone. Is it under warranty?

I went through this in November with a completely stock Nexus 6P. I was 3 days past my one year warranty! Google would not send me a new phone. It was completely bricked by the OTA update I received! I was put in touch with Huawei. I had to send the bricked phone to them. 10 days later I received a working model back. Unacceptable that an OTA update trashes a one year old $650 phone. Luckily I had my OnePlus One still, and was able to use that while I waited. I was even able to update that to 7.1.1 since it was rooted. Obviously there is some sort of issue that we are not being told of regarding the dangers of accepting OTA updates on a stock/bootlocked phone.

TemplesOfSyrinx said:
I went through this in November with a completely stock Nexus 6P. I was 3 days past my one year warranty! Google would not send me a new phone. It was completely bricked by the OTA update I received! I was put in touch with Huawei. I had to send the bricked phone to them. 10 days later I received a working model back. Unacceptable that an OTA update trashes a one year old $650 phone. Luckily I had my OnePlus One still, and was able to use that while I waited. I was even able to update that to 7.1.1 since it was rooted. Obviously there is some sort of issue that we are not being told of regarding the dangers of accepting OTA updates on a stock/bootlocked phone.
Click to expand...
Click to collapse
Bootloop issues are common on the 6P even with custom ROMs--it just happens to be much more likely you can recover with the custom ROMs installed since the bootloader is unlocked. I think it's a hardware issue with the 6P rather than an OTA issue. It's probably not an accident that Huawei didn't make the Pixels.

Doesn't seem right that I have to "void" my warranty and install a custom ROM on an unlocked, rooted phone in order to recover from a hardware defect. That's BS pure and simple. I want to use the latest software, that's why I bought a Nexus. I want to use all the conveniences like Android Pay. That's why I don't unlock or root anymore. I rooted every Android phone I ever had until now, starting with the original Motorola Droid. Now that security is so important to Google, and you can't use all the Android features with an unlocked bootloader, they need to step up to fix these problems.

This happened to my wife's phone, sent back to Bell. Will see what happens.

TemplesOfSyrinx said:
Doesn't seem right that I have to "void" my warranty and install a custom ROM on an unlocked, rooted phone in order to recover from a hardware defect. That's BS pure and simple. I want to use the latest software, that's why I bought a Nexus. I want to use all the conveniences like Android Pay. That's why I don't unlock or root anymore. I rooted every Android phone I ever had until now, starting with the original Motorola Droid. Now that security is so important to Google, and you can't use all the Android features with an unlocked bootloader, they need to step up to fix these problems.
Click to expand...
Click to collapse
Unlocking the bootloader doesn't void the warranty on the Nexus 6P. If you are under warranty then just RMA the phone if an OTA bootloops your phone. It's your choice whether to keep the bootloader locked or not but if you keep the bootloader locked it's probably impossible to recover from a bootloop. Google keeps factory images for Nexus and Pixel phones on its website but you can't flash those images with a locked bootloader. Why would they provide the images if using them voided your warranty?

You are missing my point. If I unlock my bootloader so I can recover from a boot loop that may happen, I will no longer be able to use a huge feature of the phone. Android Pay will no longer function. In days passed the rumour was your warranty was void if you unlock. I assume that was started to keep people from doing it. All I know is I paid good money for a phone that is a disaster waiting to happen it seems.
If having an unlocked bootloader is so important to recover from a bricked phone, why do they lock it in the first place? And why won't Android Pay work with it unlocked? The answer is that you no longer have a secure phone if you unlock the bootloader.

bcjk8210 said:
I too am having the bootloop issue on my stock Nexus 6P. Is there a way to unlock the device from the bootloader? I'm unable to carry out step one on Heisenberg's guide because I'm unable to actually boot up my phone past the Google logo. Am I pretty much screwed?
Click to expand...
Click to collapse
What Android version you had on your phone? What's your emmc name and ram name in bootloader? What's the manufacturing date in bootloader?

TemplesOfSyrinx said:
You are missing my point. If I unlock my bootloader so I can recover from a boot loop that may happen, I will no longer be able to use a huge feature of the phone. Android Pay will no longer function. In days passed the rumour was your warranty was void if you unlock. I assume that was started to keep people from doing it. All I know is I paid good money for a phone that is a disaster waiting to happen it seems.
If having an unlocked bootloader is so important to recover from a bricked phone, why do they lock it in the first place? And why won't Android Pay work with it unlocked? The answer is that you no longer have a secure phone if you unlock the bootloader.
Click to expand...
Click to collapse
I think you bought the wrong phone. Nexus devices were never available commercially through carriers and were made for developers and people who like to flash things with their phones. There are ways to use Android Pay with an unlocked bootloader if you are so inclined. You are right that an unlocked bootloader is considered less secure but if you only install apps from Google Play or another trusted source you shouldn't have problems. You can also simply enable allow Oem Unlock in the developer menu. This doesn't actually unlock your bootloader but makes it possible for you to unlock it via fastboot if you get bootlooped and need to flash a factory image to restore. This way you can unlock the bootloader in an emergency but your phone is still secure. I think this should be enabled by default when the phones are shipped. Too many people with locked bootloaders end up with hard bricked phones where the Nexus 6P is concerned. Honestly, you would probably be better off selling your Nexus and getting something else that's more stable and made for people who have no Interest in flashing anything.

Huawei Customer Service

Long story short, need some information on sending my 6P to Huawei. It is soft bricked and nothing I do allows me to boot.
I'm in the US, and I am currently chatting with the rep online. She asked me if I had rooted the phone, to which I said no. I assume that because I would unlock, root and flash a custom ROM that my warranty would be voided.
What is the best, easiest way to send the phone off to them? Yes it was unlocked and rooted, yes it was running a Dirty Unicorn ROM. Was on the newest TWRP. Phone calls wouldn't work, yet data and texts did. After several tries to reboot and other things, problem still precisted. Tried to flash the current ROM I was on, still nothing. When I tried to revert to my backup (maybe a week or two old), it wouldn't boot.
I have read a bunch of threads and tried every form of flashing and images to get this thing to boot, no go. I never went to Nougat, have always been on MM and only Dirty Unicorns.

Have you flash stock image from Google and tested from there. No root,etc?

therock3181 said:
Have you flash stock image from Google and tested from there. No root,etc?
Click to expand...
Click to collapse
I have flashed the stock image, MTC20? and the MTX19X.
Don't know what you mean by 'no root'. I have root, I haven't tried to remove it to flash things. Is that what you mean?
What state should the phone be in if I'm to mail it in? Does it need to be flashed stock and locked? Was there any harm in telling Huawei rep that I was unlocked, rooted & running custom ROM?

vestaviajag said:
I have flashed the stock image, MTC20? and the MTX19X.
Don't know what you mean by 'no root'. I have root, I haven't tried to remove it to flash things. Is that what you mean?
What state should the phone be in if I'm to mail it in? Does it need to be flashed stock and locked? Was there any harm in telling Huawei rep that I was unlocked, rooted & running custom ROM?
Click to expand...
Click to collapse
Before you send your phone in you should flash back to completely stock, un-rooted, and re-lock the bootloader.
Unlocking the bootloader and installing custom roms voids your warranty.
Can you access your bootloader by holding power + volume down?
If so, then use Wug's Nexus Root Toolkit
Boot your phone into the bootloader and then;
1. Input your Model Type (Huawei Nexus 6p)
2. Click "Flash Stock + Unroot"
3. Select a factory image from the dropdown ( ie Android 6.0.1 - Build MTC20F)
4. Select "Automatically download + extract the image..."
5. It will download and flash the image.
If still bootlooping, then hold the power button down until the phone turns off, and reboot back into the bootloader and
6. Click the "OEM Lock" button in Wug's Toolkit, then follow the prompt on your phone.

defcondev said:
Before you send your phone in you should flash back to completely stock, un-rooted, and re-lock the bootloader.
Click to expand...
Click to collapse
Has anyone had any luck with sending their 6P to Huawei (I believe in Texas) and getting back their phones (new or refub.)?

vestaviajag said:
Has anyone had any luck with sending their 6P to Huawei (I believe in Texas) and getting back their phones (new or refub.)?
Click to expand...
Click to collapse
I haven't read of any experiences (good or bad);
Edit: Realized you haven't sent your phone in yet.

Or follow the instructions here https://developers.google.com/android/nexus/images#angler

[SOLVED] Flash to Stock with Broken Screen

Hi,
My Rooted Phone with Pure Nexus has a Problem (see Picture) .My Cat dropped it :/
I am returning it to Google, so i want to go back to stock, stock firmware, removing the yellow triangle and so on.
I barely see anything, and Touchscreen is not working, but i can go to the bootloader.
Recovery is not acessible without Touch.
Can you help me? I know how to flash stock firmware, but does this remove the triangle? I also disabled the encryption...
Hope you can help.
br

MeisterGigi said:
Hi,
My Rooted Phone with Pure Nexus has a Problem (see Picture) .My Cat dropped it :/
I am returning it to Google, so i want to go back to stock, stock firmware, removing the yellow triangle and so on.
I barely see anything, and Touchscreen is not working, but i can go to the bootloader.
Recovery is not acessible without Touch.
Can you help me? I know how to flash stock firmware, but does this remove the triangle? I also disabled the encryption...
Hope you can help.
br
Click to expand...
Click to collapse
Hi... You don't have any datas to pull off of your phone first? Once you flash the factory image, your datas will be wiped...
In case you want to go back to stock and assuming your bootloader is unlocked, simply follow this guide:
https://forum.xda-developers.com/nexus-6p/general/guides-how-to-guides-beginners-t3206928/
To remove the open padlock at phone startup, relock the bootloader ONLY WHEN YOU'RE DONE FLASHING STOCK.
Good luck...

MeisterGigi said:
Hi,
My Rooted Phone with Pure Nexus has a Problem (see Picture) .My Cat dropped it :/
I am returning it to Google, so i want to go back to stock, stock firmware, removing the yellow triangle and so on.
I barely see anything, and Touchscreen is not working, but i can go to the bootloader.
Recovery is not acessible without Touch.
Can you help me? I know how to flash stock firmware, but does this remove the triangle? I also disabled the encryption...
Hope you can help.
br
Click to expand...
Click to collapse
You don't need to access recovery if you only want to flash stock image. Personally I would do it with flash-all.bat command rather than do all the parts individually. Since you already know how to flash the stock firmware you just need to lock the bootloader after and you are good to go. Supposedly unlocking the bootloader doesn't void the warranty on the 6P but it couldn't hurt if you are sending the phone back to Google.

Thanks !
I was assuming the data is lost anyway, the good thing is i pictures are sent anyway automatically to dropbox, many things are in the cloud.
Okay, the bootloader thing was unclear, cool, thanks, ill flash it
Thanks!
Br

[Q] Root-unlock bootloader-warranty : some questions before buying

Hi there! I've always been a Samsung user and I'm familiar with chainfire rooting method, Odin, the damn knox and all the tools that people need to achieve the beloved full control of our phones.
Let's go straight to the point: I need to buy a new phone for a friend of mine and the P9 Lite seems the most complete and suitable but I've read that if you unlock the bootloader and root it you obviously loose your warranty. The phone is unrootable by flashing a fresh OS image, but the bootloader will stay unlocked, tripping the useful warraty.
Is there any damn way to revert everything to stock in case there should be the need to send the phone to the customer service?
Thanks for the infos!

exnokiafan said:
Hi there! I've always been a Samsung user and I'm familiar with chainfire rooting method, Odin, the damn knox and all the tools that people need to achieve the beloved full control of our phones.
Let's go straight to the point: I need to buy a new phone for a friend of mine and the P9 Lite seems the most complete and suitable but I've read that if you unlock the bootloader and root it you obviously loose your warranty. The phone is unrootable by flashing a fresh OS image, but the bootloader will stay unlocked, tripping the useful warraty.
Is there any damn way to revert everything to stock in case there should be the need to send the phone to the customer service?
Thanks for the infos!
Click to expand...
Click to collapse
You can relock the bootloader if you reinstall a stock rom and revert to stock recovery, just fyi... Also there have been reports that the warranty is not void if the issue was not caused by a faulty software. Also if you are new to Huawei, be careful. And READ! A lot of people don't read, and mess up their phone...

Instead of making a new thread about the same issues I'll pitch in here too. What is the safest way to root and unroot in case of warranty? LIke the OP I came from the Samsung ecosystem too but I get the feeling if I don't at least ask about Huawei's one I'll probably **** something up.

dariomrk said:
You can relock the bootloader if you reinstall a stock rom and revert to stock recovery, just fyi... Also there have been reports that the warranty is not void if the issue was not caused by a faulty software. Also if you are new to Huawei, be careful. And READ! A lot of people don't read, and mess up their phone...
Click to expand...
Click to collapse
Simply flashing stock rom will lock bootloader but Huawei have your data of unlocking bootloader.

undercontr said:
Simply flashing stock rom will lock bootloader but Huawei have your data of unlocking bootloader.
Click to expand...
Click to collapse
That way you could say that when i get the code, i void my warranty without actually unlocking the bootloader...

dariomrk said:
That way you could say that when i get the code, i void my warranty without actually unlocking the bootloader...
Click to expand...
Click to collapse
Huawei says they "could" apply fee on unlocked phones. Maybe relocking it restores warranty? I tried to ask them but damn Chinese they don't reply.

They could, but the chance of that happening is really low, especially if your device is 100% bricked, and it needs a motherboard swap

dariomrk said:
They could, but the chance of that happening is really low, especially if your device is 100% bricked, and it needs a motherboard swap
Click to expand...
Click to collapse
If it's hardbricked and bootloader is unlocked and the problem is not related to bootloader or a process you made that requires unlocked bootloader, I think they won't fee you because it has nothing to do with bootloader. But of course a company will always choose cheaper way. If a phone goes download mode or fastboot mode it's already saved anyway.

undercontr said:
If it's hardbricked and bootloader is unlocked and the problem is not related to bootloader or a process you made that requires unlocked bootloader, I think they won't charge you
Click to expand...
Click to collapse
Exactly

undercontr said:
If a phone goes download mode or fastboot mode it's already saved anyway.
Click to expand...
Click to collapse
I wish... I can't seem to be able to save mine, even though it shows up on fastboot on the pc. The phone itself won't turn on at all. I can't seem to lock the bootloader either, anything I flash now seems to have no effect. I just hope the Huawei service fixes it.

Makishima said:
I wish... I can't seem to be able to save mine, even though it shows up on fastboot on the pc. The phone itself won't turn on at all. I can't seem to lock the bootloader either, anything I flash now seems to have no effect. I just hope the Huawei service fixes it.
Click to expand...
Click to collapse
If you have access to fastboot mode, you can flash anything. You dont have to flash an img permenantly if you want to save your phone. Use
Code:
fastboot boot boot.img
you can boot your recovery without rooting your phone. You can even open your custom recovery and flash your system.img or stock boot.img.

undercontr said:
If you have access to fastboot mode, you can flash anything. You dont have to flash an img permenantly if you want to save your phone. Use
Code:
fastboot boot boot.img
you can boot your recovery without rooting your phone. You can even open your custom recovery and flash your system.img or stock boot.img.
Click to expand...
Click to collapse
I tried fastboot flash boot boot.img (and similarly, recovery.img, system.img, any partition I could flash, multiple times with multiple files) but the phone did not boot at all. Not even into the bootloader nor recovery. It was completely unresponsive. Now the phone is not in my hands so any suggestion is too late...