Database Develop

[TUT] How to use fastboot on our device

As you can see in the title, i decided to write a small fastboot tut, especially for our p880 and its "own" commands and tricks
I am, as always, not responsible for what you do with your device. Do it on your own risk.
I will however not explain on how to set up fastboot on your PC. There are tons of tuts out there on xda, just search for it
NOTICE: You need an unlocked bootloader for this
Screenshots will be added later, 'cause my lappy is compiling right now and i thought i could use the time to write this so just wait a bit
Now, lets begin with the fun, shall we?
General
Fastboot is usually quite easy to use. But if you went searching for a tut on the web, you might have noticed that it doesn't work the way it should on your device.
That's because LG messed something up in the bootloader, but let's don't worry about that now, it does work nontheless
Fastboot is "a part" of the bootloader. This means, neither the kernel (boot), nor the recovery gets booted.
That gives you the ability to flash, but also boot kernels/recoveries. And yes, i meant booting, without really flashing it
Now we need to get into fastboot mode:
And this is (one of) the point(s) where LG messed up. The usual command is "adb reboot bootloader". But this command does not work on your device the way it should.
It gets you into a kind of fastboot mode, but you can't flash anything, because it says the bootloader would be locked, even tho it isn't.
The working command is
Code:
adb reboot oem-unlock
i guess this command sounds familliar, doesn't it? and don't worry, it will not lead you to a menu that deletes your data.
It will lead you to the working fastboot mode
now we're in the working fastboot mode. To check if you've set up fastboot correctly, type
Code:
fastboot devices
this should list your phone and its serial number.
It is recognized? good. so now we might want to check the status of our device (BL unlock state, serial number,...).
Therefore type
Code:
fastboot getvar all
now you can check whether it's really unlocked or not.
If everything's fine, you might want to...
Flash something
In order to flash something, you need the appropriate image. For kernels it's mostly "boot.img"
The command to flash something via fastboot is in general
Code:
fastboot flash <partition> <filename>
Example: You want to flash a kernel (named test_boot.img) and you have downloaded the kernel to the folder where your fastboot.exe is.
So you type
Code:
fastboot flash boot test_boot.img
This will copy the kernel to your device and then flash it to the LNX (boot) partition.
Of course you can flash other partitions, too, like system, data, cache, recovery...
After a flash, it is wise to clear the cache, or even your /data partition...
Deleting a partition
You don't need a recovery to wipe a partition, just use fastboot
The general command is
Code:
fastboot erase <partition>
For our example it's enough to wipe the cache. You can do this using this command:
Code:
fastboot erase cache
Also here you can wipe all partitions, like system, data, cache, boot, recovery...
So now we've flashed what we wanted to, wiped the needed partitions, but how do i..
Get out of fastboot
This is as easy as getting in just type
Code:
fastboot reboot
to reboot the device (Here's another thing, where LG messed up.... it reboots, but stays at the LG spash screen.
So press the power button for at least 10 secs. Now your device will reboot into recovery (!?)
then just tap reboot system now and be happy )
or
Code:
fastboot continue
this one will not reboot the device, but continue the boot procedure. I, for one, would suggest you to use the first command
now your device will boot up normally (except your kernel/system.... has a bug of course )
for more help, just type
Code:
fastboot help
and the last point is...
Bricking the device
nah, just kidding ​

Reserved

Thanks for this usefull post!
Sent from my LG-P880 using xda app-developers app

thanks, it's very useful for me.:good:

Thanks,
it's so easy

fastboot boot <kernel> <ramdisk> -c "androidboot.mode=normal"
Click to expand...
Click to collapse
<kernel> is the kernel zImage
<ramdisk> can be a .img, .cpio, .cpio.gz
-c "androidboot.mode=normal” is needed the get the kernel booted for the p880 with the correct commandline
Gesendet von meinem LG-P880 mit Tapatalk 4 Beta

So, to get into fastboot mode, I have to turn on my phone, plug it to my computer and in cmd I type adb reboot oem-unlock, right? Is there any possibility to access it in case of a bootloop or something?

boot into recovery system by holding power+vol-down till it vibrates, then use either adb to issue the command or when using twrp as recovery system: Reboot --> Fastboot
Gesendet von meinem LG-P880 mit Tapatalk 4 Beta

A little update from LG...
I wrote them that they have messed up our bootloader, and told them the bugs/problems/... well, see yourself:
1) "adb reboot bootloader" doesn't bring me into bootloader. Well it does, but even though i have unlocked the bootloader, it still says it would be locked.
instead i need to use "adb reboot oem-unlock" to get into bootloader.
- P880 does not support "adb reboot bootloader" to go into bootloader. P880 only works "adb reboot oem-unlock" instead of "adb reboot bootloader" to go into bootloader. and then you can use the fastboot command mode after accept unlock bootloader.
2) "fastboot reboot" partly reboots the device, but then it keeps stuck at the first LG splash screen. pressing power button for 10 seconds brings me into recovery then, instead of into the ROM.
- P880 supports "fastboot reboot", before flashing the customize image, "fastboot reboot" reboot normally.
3) "fastboot flash system [path/to/system.img]" gives me "fatal error: unknown partition"
- P880 can only flash boot, recovery. Ex> fastboot flash boot/recovery boot.img/recovery.img
4) "fastboot boot [...]" doesn't work at all.
- P880 does not support "fastboot boot [...]" command
- P880 supports only flash, erase, reboot as you already seen in bootloader unlock warning message.
5) I have found no way to boot into fastboot/bootloader without a booting phone. Maybe you could try to add the possibility to boot directly into fastboot.
- You can only go into fastboot mode using "adb reboot oem-unlock"
Click to expand...
Click to collapse

lg is retarded, but hey atleast they had the decency to answer

Yeh, you need to kdz flash if you mess up both system and recovery.
Keep an suid busybox in /data so you can root and re-flash CWM/TWRP in the backup+restore mode without having to clear data so the stock ROM can boot.

Can't seem to get his wokring properly, think it's the drivers.
I connect my phone to the pc, run cmd and I reboot it to to the bootloader. From there, I can't do anything. I i Write "fastboot devices" I get nothing, can't flash anything either. Have tried the official drivers from lg, but it doesn't work.

That's the same way of using fastboot like it is on Sony devices, you should mention it so more people would use this guide.
The only difference is that on sony devices if you want to unlock your bootloader you need to get the key from this site and then fastboot 0x0fce oem unlock 0xKEY

hi dudes , if phone (4x hd) is in s/w update mode , can I use fastboot command?

ppl, i beg for help:
when I use adb reboot oem-unlock or adb reboot bootloader, my phone only resets itself and boots back into normal working mode. I've tried to boot it into bootloader with holding volume up and power button and it boots into some kind of mode wheres only picture with symbols of mobile with symbols of data cable and power cable being plugged into phone with red symbol over cables that they shouldn't be unplugged. I've also tried eboot oem-unlock and reboot bootloader commands in that mode and it only resets the phone back into normal working mode while command fastboot flash recovery twrp.img only gave me "waiting for the device" and nothing happening...
also I've entered into hidden menu with 3845#*880# command bit there's no "BL status" or "Bootloader Unlock Check" or anything that has any connection to Bootloader
help?

@gesaugen: Works only with firmware 20A and higher.

GoodSoul said:
@gesaugen: Works only with firmware 20A and higher.
Click to expand...
Click to collapse
GoodSoul, thanks for info!
So I only need to upgrade firmware and it should work then...

I tried this method and for fastboot devices
i get no permissions fastboot
pls help
edit: i just did it with sudo fastboot devices
but i have another error:
fastboot flash zimage zImage
sending 'zimage' (4913 KB)...
OKAY [ 1.216s]
writing 'zimage'...
FAILED (remote: Invalid Partition Name.)

InterrtuptoR said:
but i have another error:
fastboot flash zimage zImage
sending 'zimage' (4913 KB)...
OKAY [ 1.216s]
writing 'zimage'...
FAILED (remote: Invalid Partition Name.)
Click to expand...
Click to collapse
Only "boot" and "recovery" are supported for fastboot flash command. Boot is the kernel and takes boot.img. Unfortunately, "system" is not supported, otherwise developing on this phone would have been similar to Nexus devices.

[Q] Bricked Phone - Save Photos/Videos? (Stock Everything, No Root)

Hey,
I have a AT&T HTC-One, all stock with locked bootloader.
Currently, stuck in boot loop where if you turn on the phone - it will just keep rebooting itself over and over until the battery drains. Only way to shut off would be to boot into bootloader and power down.
I could care less about fixing the phone at this point. But I have lots of pictures that I would rather not lose.
I searched around and tried to flash TWRP recovery in order to mount the sd card to my PC. However TWRP failed to flash since my boot loader is locked. I can unlock the bootloader but I will lose all my data.
Is there any way I can salvage data off my phone? Any help will be appreciated.

ashens said:
Hey,
I have a AT&T HTC-One, all stock with locked bootloader.
Currently, stuck in boot loop where if you turn on the phone - it will just keep rebooting itself over and over until the battery drains. Only way to shut off would be to boot into bootloader and power down.
I could care less about fixing the phone at this point. But I have lots of pictures that I would rather not lose.
I searched around and tried to flash TWRP recovery in order to mount the sd card to my PC. However TWRP failed to flash since my boot loader is locked. I can unlock the bootloader but I will lose all my data.
Is there any way I can salvage data off my phone? Any help will be appreciated.
Click to expand...
Click to collapse
did you try fastboot erase cache
Extract the zip below to c:\
then from c:\fastboot - right click - command prompt here
in the command windowtype
fastboot devices
your device serial no will be here
then
fastboot erase cache
fastboot reboot
hopefully your phone will reboot on it's own
Your case reminds me why I unlock and flash custom recovery the first day I get a new phone. Backups !!

clsA said:
did you try fastboot erase cache
Extract the zip below to c:\
then from c:\fastboot - right click - command prompt here
in the command windowtype
fastboot devices
your device serial no will be here
then
fastboot erase cache
fastboot reboot
hopefully your phone will reboot on it's own
Your case reminds me why I unlock and flash custom recovery the first day I get a new phone. Backups !!
Click to expand...
Click to collapse
Thank you for the quick reply.
Yes, just tried it and still no dice. Reboot still puts it back into the bootloop.
...definitely lesson learned.

ashens said:
Thank you for the quick reply.
Yes, just tried it and still no dice. Reboot still puts it back into the bootloop.
...definitely lesson learned.
Click to expand...
Click to collapse
sorry to here that ... unfortunately everything else will be destructive... but your phone may be savable
If you want to proceed post your fastboot getvar all results minus your serial no and IMEI and I'll help you get the phone going again

Honor 4x factory reset and recovery menu not work

Hi,
i need help with this strange problem, i want update my phone to android 6.0 but when i start local update phone reboot and freeze on Honor logo, when i try factory reset or reboot to stock recovery menu - its same, again only Honor logo. Bootloader work ok, its unlocked, phone rooted, but when i for example try flash twrp recovery - fastboot send me "Failed...command not allowed"...Cant access recovery menu by fastboot, any app in phone and by keys combination too..also vol up, vol down and power for update from sd card not work, trying to seek for solutions to more than 2 weeks, can anybody here help me please?Thx.

If you are sure bootloader is unlocked and using Linux OS, run fastboot commands as root/admin (as sudo).

oppili said:
If you are sure bootloader is unlocked and using Linux OS, run fastboot commands as root/admin (as sudo).
Click to expand...
Click to collapse
Yes, im sure. On bootloader mode is in red color - Phone unlocked, but i not using Linux, im on Windows 7 and this not help me....

Try fastboot oem unlock - command again.
If still not works, try fastboot erase of that *.img file before flashing that new img file.

oppili said:
Try fastboot oem unlock - command again.
When i try this command...
c:\Minimal ADB and Fastboot>fastboot oem get-bootinfo
...
(bootloader) unlocked
OKAY [ 0.004s]
finished. total time: 0.006s
If still not works, try fastboot erase of that *.img file before flashing that new img file.
Click to expand...
Click to collapse
I know about this but im above when i try erase all after this fastboot send me "Failed..." and i will be have dead phone, tell me - when i try erase command for all partitions - will be phone work wit fastboot after this??
THX

Are you the only user in pc ? Do you have admin rights ?
or
try any other pc
or
use Ubuntu OS

Lulu_568 said:
Hi,
i need help with this strange problem, i want update my phone to android 6.0 but when i start local update phone reboot and freeze on Honor logo, when i try factory reset or reboot to stock recovery menu - its same, again only Honor logo. Bootloader work ok, its unlocked, phone rooted, but when i for example try flash twrp recovery - fastboot send me "Failed...command not allowed"...Cant access recovery menu by fastboot, any app in phone and by keys combination too..also vol up, vol down and power for update from sd card not work, trying to seek for solutions to more than 2 weeks, can anybody here help me please?Thx.
Click to expand...
Click to collapse
the reason for this case, that you should not apply updates while you are rooted.
(assuming that you are in lollipop stock )I suggest you check for the driver .. try to run adb (when your phone is in the active state, not powered off)
now, reboot to bootloader and try any other fastboot commands, like fastboot reboot (just to check that fastboot is responding to the device drivers..)
if it does respond, then I'm afraid you have a serious problem, if it doesn't respond, then you have to deal with the drivers, or you have to double check if your phone is unlocked

thilak devraj said:
the reason for this case, that you should not apply updates while you are rooted.
(assuming that you are in lollipop stock )I suggest you check for the driver .. try to run adb (when your phone is in the active state, not powered off)
now, reboot to bootloader and try any other fastboot commands, like fastboot reboot (just to check that fastboot is responding to the device drivers..)
if it does respond, then I'm afraid you have a serious problem, if it doesn't respond, then you have to deal with the drivers, or you have to double check if your phone is unlocked
Click to expand...
Click to collapse
Yes, i allready try, commands like fastboot reboot, or devices - its work, but when i try fastboot flash .... or erase cache - Command not allowed, when fastboot oem unlock - data parse fail...fastboot just respond but i cannot write or erase flash - dont know why....

Lulu_568 said:
Yes, i allready try, commands like fastboot reboot, or devices - its work, but when i try fastboot flash .... or erase cache - Command not allowed, when fastboot oem unlock - data parse fail...fastboot just respond but i cannot write or erase flash - dont know why....
Click to expand...
Click to collapse
then you should take it to the service center. the only best thing you can do now..

Lulu_568 said:
Yes, i allready try, commands like fastboot reboot, or devices - its work, but when i try fastboot flash .... or erase cache - Command not allowed, when fastboot oem unlock - data parse fail...fastboot just respond but i cannot write or erase flash - dont know why....
Click to expand...
Click to collapse
erase cache command is blocked by huawei in fastboot irrespective of locked or unlocked state. somewhere i read unlock lost permissions after update. if you have not tried unlock after update try it. driver can also be an issue, install hisuite it comes with drivers.

Lulu_568 said:
Hi,
i need help with this strange problem, i want update my phone to android 6.0 but when i start local update phone reboot and freeze on Honor logo, when i try factory reset or reboot to stock recovery menu - its same, again only Honor logo. Bootloader work ok, its unlocked, phone rooted, but when i for example try flash twrp recovery - fastboot send me "Failed...command not allowed"...Cant access recovery menu by fastboot, any app in phone and by keys combination too..also vol up, vol down and power for update from sd card not work, trying to seek for solutions to more than 2 weeks, can anybody here help me please?Thx.
Click to expand...
Click to collapse
Try this once,
copy firmware in folder 'dload' in sdcard root.
press vol up + vol down + power for 20 secs then release power but keep pressing vol up and vol down

shady143 said:
Try this once,
copy firmware in folder 'dload' in sdcard root.
press vol up + vol down + power for 20 secs then release power but keep pressing vol up and vol down
Click to expand...
Click to collapse
This not work, when i try this - phone freeze on Honor logo, same as on factory reset or when i try go to Recovery menu...
I check 100 times that is bootloader unlocked, can be problem in bad root or...?

Lulu_568 said:
This not work, when i try this - phone freeze on Honor logo, same as on factory reset or when i try go to Recovery menu...
I check 100 times that is bootloader unlocked, can be problem in bad root or...?
Click to expand...
Click to collapse
okay. are you sure the bootloader is unlocked? no harm done. just hold vol down + power up. and you get that green android with white background and the text in RED that says UNLOCKED. if its LOCKED, get the UNLOCK CODE first. just a reminder, you can only fastboot flash those *.imgs if you are UNLOCKED. and there are only some files will be flashed properly (recovery.img, recovery2.img, boot.img, you can try). yes, you can use Huawei Update Extractor to get those files, even in Marshmellow files. but for reviving the phone, use B067 Kitkat or any Kitkat you can get from Huawei Downloads.
1. Get into bootloader mode. I guess you already know how to do that. Plug the phone to wall charger. Yes, leave it charged with white screen showing. Leave it until you finished preparing the PC.
2. Make sure you can use fastboot. You can use Minimal ADB and Fastboot.exe found somewhere in XDA. And make sure that it can detect the phone when you write fastboot devices. It will show up if set up properly.
3. Huawei Update Extractor + Any Kitkat firmware. Extract everything. Note the tags beside each .img inside that Update Extractor. Youre gonna need those tags in order to flash properly.
4. Copy all those *.imgs that extracted into Minimal ADB and Fastboot folder. Check program files (x86).
5. Now ready the pc by launching that minimal adb and fastboot.exe as admin. THIS IS IMPORTANT!
6. fastboot devices. pull the phone from wall charger. plug it to pc. listen to usb connecting sound and driver installation. hit enter and the device should show up.
7. This is where its getting interesting. remember the tags? use that tags like this.
RECOVERY.img = fastboot flash RECOVERY RECOVERY.img
BOOT.img = fastboot flash BOOT BOOT.img
CHECK THE TAGS BEFORE FLASHING!!! and yes, just 5 or less files will be flashed successfully. Ignore it. fastboot reboot it. Yes, its stuck, plug it to the wall again while we prepare the microsd.
8. update.app file. Put that update.app file inside /microsd/dload/update.app folder. Put the microsd inside the phone. Yes, its stuck.
9. Now do the force update. when you see the emui logo, immediately plug it back to wall charger. wait until 100% and it rebooted itself, and you can see the language selection screen again.
DO WITH YOUR OWN RISK. Ive already done it, I hope it worked for you too.

zzztidurvirus said:
okay. are you sure the bootloader is unlocked? no harm done. just hold vol down + power up. and you get that green android with white background and the text in RED that says UNLOCKED. if its LOCKED, get the UNLOCK CODE first. just a reminder, you can only fastboot flash those *.imgs if you are UNLOCKED. and there are only some files will be flashed properly (recovery.img, recovery2.img, boot.img, you can try). yes, you can use Huawei Update Extractor to get those files, even in Marshmellow files. but for reviving the phone, use B067 Kitkat or any Kitkat you can get from Huawei Downloads.
1. Get into bootloader mode. I guess you already know how to do that. Plug the phone to wall charger. Yes, leave it charged with white screen showing. Leave it until you finished preparing the PC.
2. Make sure you can use fastboot. You can use Minimal ADB and Fastboot.exe found somewhere in XDA. And make sure that it can detect the phone when you write fastboot devices. It will show up if set up properly.
3. Huawei Update Extractor + Any Kitkat firmware. Extract everything. Note the tags beside each .img inside that Update Extractor. Youre gonna need those tags in order to flash properly.
4. Copy all those *.imgs that extracted into Minimal ADB and Fastboot folder. Check program files (x86).
5. Now ready the pc by launching that minimal adb and fastboot.exe as admin. THIS IS IMPORTANT!
6. fastboot devices. pull the phone from wall charger. plug it to pc. listen to usb connecting sound and driver installation. hit enter and the device should show up.
7. This is where its getting interesting. remember the tags? use that tags like this.
RECOVERY.img = fastboot flash RECOVERY RECOVERY.img
BOOT.img = fastboot flash BOOT BOOT.img
CHECK THE TAGS BEFORE FLASHING!!! and yes, just 5 or less files will be flashed successfully. Ignore it. fastboot reboot it. Yes, its stuck, plug it to the wall again while we prepare the microsd.
8. update.app file. Put that update.app file inside /microsd/dload/update.app folder. Put the microsd inside the phone. Yes, its stuck.
9. Now do the force update. when you see the emui logo, immediately plug it back to wall charger. wait until 100% and it rebooted itself, and you can see the language selection screen again.
DO WITH YOUR OWN RISK. Ive already done it, I hope it worked for you too.
Click to expand...
Click to collapse
First...many thanks for your interest!
Look, about bootloader, on boot mode is in red PHONE UNLOCKED, i try this command in fastboot:
C:\Minimal ADB and Fastboot>adb reboot bootloader
C:\Minimal ADB and Fastboot>fastboot oem get-bootinfo
...
(bootloader) unlocked
OKAY [ 0.016s]
finished. total time: 0.016s
C:\Minimal ADB and Fastboot>fastboot oem backdoor info
...
(bootloader) FB LockState: LOCKED
(bootloader) USER LockState: UNLOCKED
OKAY [ -0.000s]
finished. total time: -0.000s
so what is FB Lockstate??Is my bootloader unlocked or locked??
Here is another command which i try....
C:\Minimal ADB and Fastboot>fastboot -w
wiping userdata...
Erase successful, but not automatically formatting.
Can't determine partition type.
FAILED (remote: Command not allowed)
erasing 'userdata'...
FAILED (remote: Command not allowed)
finished. total time: 0.000s
Cant derermine partition type - is this problem?
I also try this....
C:\Minimal ADB and Fastboot>fastboot flash recovery recovery.img
target reported max download size of 524288000 bytes
sending 'recovery' (25034 KB)...
OKAY [ 0.783s]
writing 'recovery'...
OKAY [ 1.033s]
finished. total time: 1.831s
C:\Minimal ADB and Fastboot>fastboot boot recovery.img
downloading 'boot.img'...
OKAY [ 0.801s]
booting...
FAILED (remote: Command not allowed)
finished. total time: 0.801s
It seems that fastboot write recovery (with your help i need use admin rights now this work) but i still cant boot to recovery no matter how...
I can also flash and backup boot and recovery via Flashify or Rashr and when i open backup with HEX editor it seems that i succesfully upload TWRP but still cannot acess TWRP recovery....
This is all what i try in this time, of course i read your help words about Huawei extractor etc. but not try at this time, i hope i explain more detailed my problem. Look im not a newbie, i allready flash etc. my Lenovo and P9 lite what i have here but not understand where can be problem in this Honor 4x, it seems like corrupted recovery partition or can be problem in read only/write partition - i play with this option before....
anyway - run as admin - this help me a lot i think, THX and wait your answer.
EDIT: one thing, you think that when i try flash stock recovery (i can, no problem of course) it will be work?
Update: Big success, i just try flash stock recovery B064b and now im in stock recovery menu, im surprised but what now? I want update to Marshmallow 6.0....?
But in stock recovery is: phone and the data cannot be recovered. Continue?
Oh sorry, this is about "not sd card inserted" problem
What will now progress? I have inside B130 firmware and want Marshmallow, also TWRP recovery must i flash now especially for B130 firmware for work?
Update: Yes, all working now, factory reset, recovery etc. you help me a lot, only if you can tell me what number of firmware must i upload for Marshmallow, thx
Last update: So finally, coz im too hurry and dont want wait for your answer :angel:, i just upload from local update first Android 5.1.1. after this 6.0 and all is perfect and working!
My big thanks and kisses goes to you zzztidurvirus, im lucky and still cant beleive that all works, again thx!!

I did once on Win to revert back to Stock from CM12.1 by using img from update.app file. For my case, it's the MM update.app not working, I couldn't flash img files into phone, then I tried to flash files from LP, it worked. I boot into LP ROM and update from there to MM.

Hey hey people.
I was trying to upgrade my friend's Honor X4 Che2-L11 variant to 6.0 age from it's lollipop and ****ed up - big time. It seems to have a recovery, and it bootloops. I can't get it to install any update.app though, it either errors or gets stuck/crashes at 5%.
Now I am trying to flash a individual stock recovery with fastboot. Like the guide by zzztidurvirus there, but whenever I try to issue flash command this is what I get:
target reported max download size of 471859200 bytes
sending 'RECOVERY' (9304 KB)...
OKAY [ 0.258s]
writing 'RECOVERY'...
FAILED (remote: Command not allowed)
finished. total time: 0.261s
- so basically any flash command sends OKAY, Writing Fails with Command not allowed. Bootloader is unlocked, "PHONE unlocked" on screen and same status messages from fastboot as Lulu up there when making queries.
What gives, what could I try still?

Lulu_568 said:
This not work, when i try this - phone freeze on Honor logo, same as on factory reset or when i try go to Recovery menu...
I check 100 times that is bootloader unlocked, can be problem in bad root or...?
Click to expand...
Click to collapse
I had faced same issue but get back by using the that method.

Sumea said:
Hey hey people.
I was trying to upgrade my friend's Honor X4 Che2-L11 variant to 6.0 age from it's lollipop and ****ed up - big time. It seems to have a recovery, and it bootloops. I can't get it to install any update.app though, it either errors or gets stuck/crashes at 5%.
Now I am trying to flash a individual stock recovery with fastboot. Like the guide by zzztidurvirus there, but whenever I try to issue flash command this is what I get:
target reported max download size of 471859200 bytes
sending 'RECOVERY' (9304 KB)...
OKAY [ 0.258s]
writing 'RECOVERY'...
FAILED (remote: Command not allowed)
finished. total time: 0.261s
- so basically any flash command sends OKAY, Writing Fails with Command not allowed. Bootloader is unlocked, "PHONE unlocked" on screen and same status messages from fastboot as Lulu up there when making queries.
What gives, what could I try still?
Click to expand...
Click to collapse
In this case help me i think run adb/fastboot as a admin and i use stock recovery .img from Huawei extractor when i got first success with writing as i remember, hope this help you...

Lulu_568 said:
In this case help me i think run adb/fastboot as a admin and i use stock recovery .img from Huawei extractor when i got first success with writing as i remember, hope this help you...
Click to expand...
Click to collapse
Sadly not, as I tried both running ADB fastboot as admin from administrator command line and I tried three different recovery images from huawei, 6.0 (because the flash went bad during attempt to flash a 4.1EMUI with 6.0 B506 ROM for CHE2-L11) - And it keeps denying the write attempt with the same message. More info on the flash: I tried to TWRP flash from 5.1 rom to the EMUI4.1 6.0 ROM following guide someone made with updateappflasher.zip or something, during the flash the phone just crashed 60% in the bar and after that the phone is boot looping into recovery but it can't do anything. Like said any attempt to flash a stock rom even if a recovery seems to exist when booting VOL+ & POWER at the same time, but it will fail if attempting to do wipe data/factory reset in 40% mark. Forced updater can also be accessed but again, thanks to the firmware situation the phone is in it does not flash anything beyond 5% without crashing and being stuck or just giving an error message outright.
Only thing I might have not have is the right kind of ADB drivers but googling about CHE2-L11 I really cannot find a ADB drivers for this phone for life of me and dealing with windows 10 these days makes it worse. At least it used to be that I was with windows 7, back when I myself unlocked the bootloader of the phone and rooted it myself, I have some memory of that being harsh to deal with too, as I had hard time getting drivers that worked right with the phone etc.
I will check into this... At this point my friend bought a new phone already but I still will try to fix the phone for him since I feel personally pretty bad for pretty big mess I made.
I will also try this with a windows XP machine I have still, it is meant entirely for different things but at times like these it is somewhat nice to have a XP around. At least the darn driver problems are not a problem.
UPDATES:
I unbricked the phone. The stock recovery was intact enough for just a normal dload install of a update.app from huawei - why it did not initially work was probably the USB connection to computer and/or 64gig microSD card my friend had, not being compatible with Huawei's recovery updater. I myself had a 8gig card around which worked and I restored the phone ultimately to a 6.0 official ROM. I also went ahead to root it - and final find really was that the reason why recovery etc. would not flash, was because I wrote "fastboot flash RECOVERY twrp.img" - instead of "fastboot flash recovery twrp.img" - the latter works, and the all caps for "RECOVERY" results in illegal command error - and it was no bigger than that.
Meanwhile even after sorting this all out my friend already ended up buying a new phone so it hurts but I hope some other people find some info here useful.

SOFT BRICK using tool Xiaomi Mi A2

Hi guys, i need some help pleeease!
I was with the November security patch on my cell phone, I unlock the bootloader and went to use the friend tool (https://forum.xda-developers.com/mi-a2/how-to/mi-a2-toolkit-unlock-bootloader-root-t3834585) to activate the camera2api.
But it gave problem and the cell phone did not turn on, it was locked in the screen of android one.
So I downloaded the patched_boot.img from the version I was in and put it via fastboot. did not work.
Now, my phone is in this situation: I tried to use MiFlash (three versison: 2018528, 2017720 and 20151028) and they fail in the middle of the process, accusing "FAILED (command write failed (Unknown error))".
And: when I try to connect the cell phone normally, it shows the unlocked bootloader warning and goes straight to the fastboot, even without my request. This is strange. Perhaps because the system is damaged by the miflash unfinished
Obs: bootloader are unlocked and i can access twrp
If anyone can help me I will be very grateful and happy

What exactly did the "tool" do? I mean if you don't know that, pretty difficult to diagnose what's wrong...

AsItLies said:
What exactly did the "tool" do? I mean if you don't know that, pretty difficult to diagnose what's wrong...
Click to expand...
Click to collapse
Hi.
The tool (her topic link is up there) promised to activate camera2api without root my device (allowing OTAs in the future).
I believe she did a "temporary root" with a "temporary" boot.img just to activate the camera2api, and when it rebooted, it would return to normal boot.img without root. I do not know if I could explain it well.
The current issue is that it seems that the system is currently "destroyed or corrupted". Can not I reinstall the entire system through TWRP? Or something like this

Like I said, you don't know what it actually did. What it promised is one thing, what it did... another
That's the problem with 'tools'.
Have you tried doing a factory reset? Hold Vol up and power until it gets to Recovery (hopefully), if you do a quick press of vol up, that gets past the 'no command'. Then use vol up and down for selection and press power when on 'factory reset'.
It might work

AsItLies said:
Like I said, you don't know what it actually did. What it promised is one thing, what it did... another
That's the problem with 'tools'.
Have you tried doing a factory reset? Hold Vol up and power until it gets to Recovery (hopefully), if you do a quick press of vol up, that gets past the 'no command'. Then use vol up and down for selection and press power when on 'factory reset'.
It might work
Click to expand...
Click to collapse
You are right, friend.. this is the problems with tools! I never use tools with my A1 and past phones.. just this time :crying:
I tried the factory reset now. And it did not work, unfortunately. On the first attempt (I was in fastboot mode) he showed a white circle with the writing "ERASING" and then went back to the screen of Android One, and then I tried again Vol Up + Power and he appeared "No command" , and after I rebooted and tried again, nothing appears, it just restarts to the static screen of "Android One"
Another ideas?

erickxd said:
You are right, friend.. this is the problems with tools! I never use tools with my A1 and past phones.. just this time :crying:
I tried the factory reset now. And it did not work, unfortunately. On the first attempt (I was in fastboot mode) he showed a white circle with the writing "ERASING" and then went back to the screen of Android One, and then I tried again Vol Up + Power and he appeared "No command" , and after I rebooted and tried again, nothing appears, it just restarts to the static screen of "Android One"
Another ideas?
Click to expand...
Click to collapse
The only other thing I can think of would be to change the current slot. If that works you would be booted into the prior version of the OS vs the latest update you did.
In fastboot, do fastboot getvar current-slot
Depending on what that slot is, change it to the other one (can only be a or b)
thus fastboot set_active a (or b, whichever is not the current one)
then fastboot reboot - and hope it boots.

AsItLies said:
The only other thing I can think of would be to change the current slot. If that works you would be booted into the prior version of the OS vs the latest update you did.
In fastboot, do fastboot getvar current-slot
Depending on what that slot is, change it to the other one (can only be a or b)
thus fastboot set_active a (or b, whichever is not the current one)
then fastboot reboot - and hope it boots.
Click to expand...
Click to collapse
Well... fastboot don't recognize this command, he show the list of avaible commands
And i don't know why, but for now i can't boot in twrp.img
i'm going crazy :crying::crying::crying:

erickxd said:
Well... fastboot don't recognize this command, he show the list of avaible commands
And i don't know why, but for now i can't boot in twrp.img
i'm going crazy :crying::crying::crying:
Click to expand...
Click to collapse
That's probably because you have an old version of fastboot installed. Upgrade to the newest version, which should recognize dual slots.
dual slots are quite new.

AsItLies said:
That's probably because you have an old version of fastboot installed. Upgrade to the newest version, which should recognize dual slots.
dual slots are quite new.
Click to expand...
Click to collapse
Fastboot updated now! I changed the slot from B to A.
But doesn't work, unfortunately. After reboot, the phone can't boot and appears the screen asking between Try Boot Again or Factory Reset. I tried Factory Reset, but don't work =( return to the same screen.
What seems very strange to me, is the Miflash doesn't work. With my Mi A1 miflash ever save me

erickxd said:
Fastboot updated now! I changed the slot from B to A.
But doesn't work, unfortunately. After reboot, the phone can't boot and appears the screen asking between Try Boot Again or Factory Reset. I tried Factory Reset, but don't work =( return to the same screen.
What seems very strange to me, is the Miflash doesn't work. With my Mi A1 miflash ever save me
Click to expand...
Click to collapse
I've never used miflash, so no help there.
I'd try flashing the correct boot.img (for your software version). You can find the various boot images in the following link (don't forget to thank user ckpv5 for uploading these).
https://sourceforge.net/projects/others/files/Xiaomi_MiA2/
you would do fastboot flash boot_b boot.img
I'd suggest using b slot, as that was originally active. After flashing, set it back to active, try to reboot... then cross your fingers

AsItLies said:
I've never used miflash, so no help there.
I'd try flashing the correct boot.img (for your software version). You can find the various boot images in the following link (don't forget to thank user ckpv5 for uploading these).
https://sourceforge.net/projects/others/files/Xiaomi_MiA2/
you would do fastboot flash boot_b boot.img
I'd suggest using b slot, as that was originally active. After flashing, set it back to active, try to reboot... then cross your fingers
Click to expand...
Click to collapse
Doesn't work man.. I went to twrp and checking there in the "WIPES session", I saw that the SYSTEM partition is 0kb used and 0kb free. Appears to be entirely empty
Do not have a way to install the whole system via twrp?

erickxd said:
Doesn't work man.. I went to twrp and checking there in the "WIPES session", I saw that the SYSTEM partition is 0kb used and 0kb free. Appears to be entirely empty
Do not have a way to install the whole system via twrp?
Click to expand...
Click to collapse
No, I don't. But I can tell you, twrp is a recovery app. It shouldn't be in the boot slot. And, with dual slot configurations, there is no recovery partition. The other slot is now used to do a recovery.
In other words, the way we *used* to use twrp doesn't work on dual slot phones. I think that's a big part of the confusion people are having. While the boot images do have a small recovery part to them, it's not a separate partition.
If you're flashing boot.img, and setting that slot active, I've no idea how you're getting into twrp.

Since now your fastboot is working why don't you use miflash to flash official stock ROM
1. You need unlocked bootloader which you already have.
2. Run these command to unlock critical partition
fastboot flashing unlock_critical
3 . Download the official fastboot V9.6.14.0 ROM from
https://forum.xda-developers.com/mi-a2/how-to/ota-v9-6-5-0-odimife-t3823445
Or here
http://en.miui.com/getrom.php?r=353&m=yes&app=false
4. Install with miflash (you already know the how-to)
5. Once up & running, do OTA to latest
Later .. redo what you want to do like enable camera api2 with proper guide.
E.g: https://forum.xda-developers.com/mi-a2/how-to/how-to-enable-cam2api-simply-ota-t3858861

ckpv5 said:
Since now your fastboot is working why don't you use miflash to flash official stock ROM
1. You need unlocked bootloader which you already have.
2. Run these command to unlock critical partition
fastboot flashing unlock_critical
3 . Download the official fastboot V9.6.14.0 ROM from
https://forum.xda-developers.com/mi-a2/how-to/ota-v9-6-5-0-odimife-t3823445
Or here
http://en.miui.com/getrom.php?r=353&m=yes&app=false
4. Install with miflash (you already know the how-to)
5. Once up & running, do OTA to latest
Later .. redo what you want to do like enable camera api2 with proper guide.
E.g: https://forum.xda-developers.com/mi-a2/how-to/how-to-enable-cam2api-simply-ota-t3858861
Click to expand...
Click to collapse
Hello.
I've tried using Miflash several times (3 different versions), but it never ends, it end up with an error every time that he will copy the file system.img to the mobile phone (I analyzed the log).
The miflash divides the file system.img into 5 or 6 smaller parts to be able to transfer to the mobile phone, and in some of these parts gives error, everytime :crying:

AsItLies said:
No, I don't. But I can tell you, twrp is a recovery app. It shouldn't be in the boot slot. And, with dual slot configurations, there is no recovery partition. The other slot is now used to do a recovery.
In other words, the way we *used* to use twrp doesn't work on dual slot phones. I think that's a big part of the confusion people are having. While the boot images do have a small recovery part to them, it's not a separate partition.
If you're flashing boot.img, and setting that slot active, I've no idea how you're getting into twrp.
Click to expand...
Click to collapse
I can access twrp when I flash ''fastboot boot twrp.img" in powershell, so until the next reboot I have access to twrp

erickxd said:
Hello.
I've tried using Miflash several times (3 different versions), but it never ends, it end up with an error every time that he will copy the file system.img to the mobile phone (I analyzed the log).
The miflash divides the file system.img into 5 or 6 smaller parts to be able to transfer to the mobile phone, and in some of these parts gives error, everytime :crying:
Click to expand...
Click to collapse
When I read your post here - https://forum.xda-developers.com/showpost.php?p=78085858&postcount=188
"flashing is not allowed for critical partitions" usually due to critical partitions not unlocked. So .. if you already run "fastboot flashing unlock_critical" and you still have error using miflash .. nothing much I can offer to help. Hopefully you'll be able to fix it.

ckpv5 said:
When I read your post here - https://forum.xda-developers.com/showpost.php?p=78085858&postcount=188
"flashing is not allowed for critical partitions" usually due to critical partitions not unlocked. So .. if you already run "fastboot flashing unlock_critical" and you still have error using miflash .. nothing much I can offer to help. Hopefully you'll be able to fix it.
Click to expand...
Click to collapse
Hmm thanks for the answer!
Even when the operation fails after transfer a couple of archives before the system.img??? (on the Miflash)
If my phone was locked, Miflash could transfer these couple of archives before the operation fails?? Or if bootloader is locked, zero files can be passed by Miflash, and the error is apresented at the beginning of the operation?

Have you successfully unlocked critical partitions?
If yes, try to run flash_all.bat from the official stock image you downloaded. No need to use MiFlash.

prokaryotic cell said:
Have you successfully unlocked critical partitions?
If yes, try to run flash_all.bat from the official stock image you downloaded. No need to use MiFlash.
Click to expand...
Click to collapse
well... When I just run flash_all.bat from the stock image folder, the .bat file will recognize that I am running it for the connected mobile?
how exactly should I run flash_all.bat? just double clicking it in stock image folder? or should I copy the .bat to /adb folder and open power shell prompt in adb folder and execute the .bat from there? sorry for my ignorance
Can you show me, please?

erickxd said:
well... When I just run flash_all.bat from the stock image folder, the .bat file will recognize that I am running it for the connected mobile?
how exactly should I run flash_all.bat? just double clicking it in stock image folder? or should I copy the .bat to /adb folder and open power shell prompt in adb folder and execute the .bat from there? sorry for my ignorance
Can you show me, please?
Click to expand...
Click to collapse
Before someone can explain that, why don't you answer the question asked .. in fact at least 3 people was asking/telling ...
"Have you successfully unlocked critical partitions?"
Without the proper answer from you, not easy to help.

Can't erase via fastboot, even with unlocked bootloader.

I've been having connectivity issues with my phone ever since I flashed LineageOS. I've tried a ton of fixes, but none of them have solved it. I want to try the fix outlined here:
Go-to your phone bootloader mode connect pc adbfastboot command mode then type command.
Mfastboot erase modemst1
Enter
Mfastboot erase modemst2
Enter
Then reboot
Click to expand...
Click to collapse
But I can't get it to work. When I try to erase modemst1, I get this message:
FAILED (remote: 'Erasing is not allowed for partition')​
I thought perhaps I had relocked my bootloader, so I tried to unlock it again, but got this message:
FAILED (remote: 'Device already unlocked')​
Then I thought Magisk might be interfering with this, so I unstalled Magisk. But the message was the same.
What's causing this, and how do I fix?

Remove the "M" from the start of the command.

SXUsr said:
Remove the "M" from the start of the command.
Click to expand...
Click to collapse
Oh yeah, did that. I'm on a Mac so it's ./fastboot