Database Develop

[Q] Trying to flash drunk- failed. Now what?

Ok guys, so I was trying to flash the software on my Sprint HTC One with a custom one, while drunk. Needless to say it didn't work. I suspect that chrome f*cked up downloading the rom, because it was only 800mb, and should have been about 1gb. Now, the phone isn't working. When I try to turn it on it shows the htc logo and then boots up in fastboot. Fastboot still receives cmd commands, but I still havent found a way to flash an RUU on it. Tryed with twrp as a recovery- cant mount to computer. Tryed sending the file to phone through cmd- some error about not working radio came through. I'm cutting corners explayning all the methods I tryed to make it work, but there were a lot of them and I dont remember all. I have flashed the boot and the recovery back to the stock ones, bootloader IS unlocked. Phone vertion (as shown in the bootloader screen):
***TAMPERED***
***UNLOCKED***
M7_WLS PVT SHIP S-ON RH
HBOOT- 1.44.0000
OpenDSP-v31.120.274.0617
eMMC- boot
Jul 5 2013,17:19:22:-1
My question is how do I return it to stock condition (or unlocked to all networks if possible)? Please, I've been trying to fix it on my own for over a week now, and am getting desperate. If possible please give links to step-by-step tutorials and/or files I'll need. Thank you in advance.
PS.: Also, for some reason my computer does fails to install the HTC MTP device driver. Could it be from that, and if it is- will using a different computer solve the problem (tryed a million times to fix that as well- no luck)?

drobalqk said:
Ok guys, so I was trying to flash the software on my Sprint HTC One with a custom one, while drunk. Needless to say it didn't work. I suspect that chrome f*cked up downloading the rom, because it was only 800mb, and should have been about 1gb. Now, the phone isn't working. When I try to turn it on it shows the htc logo and then boots up in fastboot. Fastboot still receives cmd commands, but I still havent found a way to flash an RUU on it. Tryed with twrp as a recovery- cant mount to computer. Tryed sending the file to phone through cmd- some error about not working radio came through. I'm cutting corners explayning all the methods I tryed to make it work, but there were a lot of them and I dont remember all. I have flashed the boot and the recovery back to the stock ones, bootloader IS unlocked. Phone vertion (as shown in the bootloader screen):
***TAMPERED***
***UNLOCKED***
M7_WLS PVT SHIP S-ON RH
HBOOT- 1.44.0000
OpenDSP-v31.120.274.0617
eMMC- boot
Jul 5 2013,17:19:22:-1
My question is how do I return it to stock condition (or unlocked to all networks if possible)? Please, I've been trying to fix it on my own for over a week now, and am getting desperate. If possible please give links to step-by-step tutorials and/or files I'll need. Thank you in advance.
Click to expand...
Click to collapse
It sounds like you have the same problem that a lot of people are getting into around here, myself included. You tried to flash a non-cdma compatible rom onto your phone.
There are numerous postings about how to fix this, however, it depends on the condition of your phone which step you take.
If you have recovery installed and you have access to recovery you will take different steps than if you only have access to fastboot.
You need to have a recovery installed and you need to relock your phone to fastboot ruu. Once that is done you basically start from scratch and unlick your phone again and then you can reinstall the recovery and then flash the correct cdma compatible roms.

MrFixit007 said:
It sounds like you have the same problem that a lot of people are getting into around here, myself included. You tried to flash a non-cdma compatible rom onto your phone.
There are numerous postings about how to fix this, however, it depends on the condition of your phone which step you take.
If you have recovery installed and you have access to recovery you will take different steps than if you only have access to fastboot.
You need to have a recovery installed and you need to relock your phone to fastboot ruu. Once that is done you basically start from scratch and unlick your phone again and then you can reinstall the recovery and then flash the correct cdma compatible roms.
Click to expand...
Click to collapse
The recovery I can install in a matter of seconds, same with relocking. I have the lastest vertions on both TWRP and Clockwork. Which one do I install and how do I proceed after? Thank you

drobalqk said:
The recovery I can install in a matter of seconds, same with relocking. I have the lastest vertions on both TWRP and Clockwork. Which one do I install and how do I proceed after? Thank you
Click to expand...
Click to collapse
do you have adb access? or only fastboot access?

MrFixit007 said:
do you have adb access? or only fastboot access?
Click to expand...
Click to collapse
adb- Im not sure. How do I check? Fastboot- I think so. It accepts my cmd commands for flashing recovery and rom (although when I tryed to flash rom it failed).

drobalqk said:
adb- Im not sure. How do I check? Fastboot- I think so. It accepts my cmd commands for flashing recovery and rom (although when I tryed to flash rom it failed).
Click to expand...
Click to collapse
In your command window in the same directory you run fastboot from, you should be able to run adb.
The easiest way to check is to type: adb devices
this should return a value if you are booted into recovery.
it will give you nothing if you aren't in recovery.
if you cannot get into recovery then you need to make sure your phone is unlocked and then fastboot a recovery onto your phone.

MrFixit007 said:
In your command window in the same directory you run fastboot from, you should be able to run adb.
The easiest way to check is to type: adb devices
this should return a value if you are booted into recovery.
it will give you nothing if you aren't in recovery.
if you cannot get into recovery then you need to make sure your phone is unlocked and then fastboot a recovery onto your phone.
Click to expand...
Click to collapse
I currently have the stock recovery flashed on it. Is that one going to work or should I flash TWRP/ Clockwork?

drobalqk said:
I currently have the stock recovery flashed on it. Is that one going to work or should I flash TWRP/ Clockwork?
Click to expand...
Click to collapse
as long as you can boot into recovery, it should work. i personally favor twrp, but any recovery should work.
try out some adb commands and see.
adb sevices
adb shell
if you get anywhere with those while booted into recovery you should be ok.

MrFixit007 said:
as long as you can boot into recovery, it should work. i personally favor twrp, but any recovery should work.
try out some adb commands and see.
adb sevices
adb shell
if you get anywhere with those while booted into recovery you should be ok.
Click to expand...
Click to collapse
adb devices returns no values
adb services returns big list of commands
adb shell returns error device not found.
I'm into TWRP v.2.6.1.0 start screen.

drobalqk said:
adb devices returns no values
adb services returns big list of commands
adb shell returns error device not found.
I'm into TWRP v.2.6.1.0 start screen.
Click to expand...
Click to collapse
did those adb errors or no devices found occur while your phone was showing the twrp start screen?
if yes, then we need to reboot into the bootloader-- to fastboot.
if no then try adb shell again while showing the twrp start screen.

MrFixit007 said:
did those adb errors or no devices found occur while your phone was showing the twrp start screen?
if yes, then we need to reboot into the bootloader-- to fastboot.
if no then try adb shell again while showing the twrp start screen.
Click to expand...
Click to collapse
Yes, I was IN TWRP recovery home screen. I'll try the commands in fastboot as soon as I come back from work. Thank you for the time you spend trying to help me, I do very much apreciate it.

drobalqk said:
Yes, I was IN TWRP recovery home screen. I'll try the commands in fastboot as soon as I come back from work. Thank you for the time you spend trying to help me, I do very much apreciate it.
Click to expand...
Click to collapse
It seems like you need to fastboot flash recovery onto your phone again.
Here are the steps as I think they should work to get you back up and running.
**Make sure your phone is unlocked. (it should display ***UNLOCKED*** at the top of the bootloader screen)
if you ARE unlocked do the following(+++see below if you are NOT unlocked+++)
1. from bootloader select fastboot - connect phone to computer. fastboot should change to fastboot usb when you have a good connection.
on your computer:
2. open a command window and navigate to the folder where adb and fastboot are located
3. type in "fastboot flash recovery xxxxxxxx.zip" where xxxxxxxx.zip is the name of recovery zip file without quotes. Make sure you download a good copy appropriate for your phone. I would use this one: http://techerrata.com/file/twrp2/m7wls/openrecovery-twrp-2.6.1.0-m7wls.img
4. type fastboot reboot
on your phone:
5. once it is rebooted and in bootloader select recovery and boot into recovery.
on your computer:
6. once your phone shows recovery main screen then typeat the command prompt: adb shell
7. no matter what the prompt looks like type: echo "1.29.651.10" | dd of=/dev/block/mmcblk0p19 bs=1 seek=160
8. no matter if it errors or not type: adb reboot bootloader
9. type: fastboot oem lock
10. type: fastboot oem rebootRUU
11. type fastboot flash zip xxxxxxxxxxxxx.zip where xxxxxxxxxxxxx.zip is the name of the ruu.zip file. i would use this one: http://www.androidfilehost.com/?fid=22926241640219526
12 reboot your phone once that is successful!! If you get the "flush image again immideately" error message then repeat step 11. then reboot your phone.
you should now be running a stock sprint phone.
you can now unlock your phone again and reinstall a recovery.
to unlock your phone the second time:
13. boot your phone into bootloader then go to fastboot - make sure the phone is connected to the computer
14. on your computer type in: fastboot flash unlocktoken Unlock_code.bin
15. on your phone select unlock with volume rocker and press power once unlock is selected
16. on computer type: fastboot flash recovery xxxxxxxxx.zip where xxxxxxxxxx.zip is the same recovery zip file we used above in step 3
17. reboot your phone and you are now unlocked and you have a custom recovery installed and you can download a CDMA compatible rom to your phone and install it with the recovery like normal. or you can continue to run stock.
MAKE SURE YOU ONLY DOWNLOAD CDMA COMPATIBLE ROMS FROM THE SPRINT HTC ONE FORUMS.
enjoii!!
+++if you are NOT unlocked+++
try the following:
step 13
step 14
step 15
step 16
step 4
step 5
step 6-17
make sure you complete all the way through 17 after you do step 6. good luck and let me know what your results are.

MrFixit007 said:
It seems like you need to fastboot flash recovery onto your phone again.
Here are the steps as I think they should work to get you back up and running.
**Make sure your phone is unlocked. (it should display ***UNLOCKED*** at the top of the bootloader screen)
if you ARE unlocked do the following(+++see below if you are NOT unlocked+++)
1. from bootloader select fastboot - connect phone to computer. fastboot should change to fastboot usb when you have a good connection.
on your computer:
2. open a command window and navigate to the folder where adb and fastboot are located
3. type in "fastboot flash recovery xxxxxxxx.zip" where xxxxxxxx.zip is the name of recovery zip file without quotes. Make sure you download a good copy appropriate for your phone. I would use this one: http://techerrata.com/file/twrp2/m7wls/openrecovery-twrp-2.6.1.0-m7wls.img
4. type fastboot reboot
on your phone:
5. once it is rebooted and in bootloader select recovery and boot into recovery.
on your computer:
6. once your phone shows recovery main screen then typeat the command prompt: adb shell
7. no matter what the prompt looks like type: echo "1.29.651.10" | dd of=/dev/block/mmcblk0p19 bs=1 seek=160
8. no matter if it errors or not type: adb reboot bootloader
9. type: fastboot oem lock
10. type: fastboot oem rebootRUU
11. type fastboot flash zip xxxxxxxxxxxxx.zip where xxxxxxxxxxxxx.zip is the name of the ruu.zip file. i would use this one: http://www.androidfilehost.com/?fid=22926241640219526
12 reboot your phone once that is successful!! If you get the "flush image again immideately" error message then repeat step 11. then reboot your phone.
you should now be running a stock sprint phone.
you can now unlock your phone again and reinstall a recovery.
to unlock your phone the second time:
13. boot your phone into bootloader then go to fastboot - make sure the phone is connected to the computer
14. on your computer type in: fastboot flash unlocktoken Unlock_code.bin
15. on your phone select unlock with volume rocker and press power once unlock is selected
16. on computer type: fastboot flash recovery xxxxxxxxx.zip where xxxxxxxxxx.zip is the same recovery zip file we used above in step 3
17. reboot your phone and you are now unlocked and you have a custom recovery installed and you can download a CDMA compatible rom to your phone and install it with the recovery like normal. or you can continue to run stock.
MAKE SURE YOU ONLY DOWNLOAD CDMA COMPATIBLE ROMS FROM THE SPRINT HTC ONE FORUMS.
enjoii!!
+++if you are NOT unlocked+++
try the following:
step 13
step 14
step 15
step 16
step 4
step 5
step 6-17
make sure you complete all the way through 17 after you do step 6. good luck and let me know what your results are.
Click to expand...
Click to collapse
Nope, adb still doesn't work. Could it be something wrong with the drivers my computer installs? Because when I'm in recovery my computer detects the device in "Other Devices" as "M7WLS", and I don't have a driver for that and neither does microsoft update. Any suggestions?

drobalqk said:
Nope, adb still doesn't work. Could it be something wrong with the drivers my computer installs? Because when I'm in recovery my computer detects the device in "Other Devices" as "M7WLS", and I don't have a driver for that and neither does microsoft update. Any suggestions?
Click to expand...
Click to collapse
Did you install HTC Sync or did you install the naked drivers from here?
Otherwise, where in the process did you get stopped?
EDIT: You can always PM me your teamviewer info and I can work on it.

Please help big trouble

Please help in big trouble.. my phone is stuck at Fastboot screen.. Nothing is working no volume keys nothing... What did i Do:
Unlocked bootloader...
and then I was trying to flash a custom recovery but after typing fastboot boot recovery.img.. it showed something like booting and then it finished.. Then in the tutorial it was written :
Perform a nandroid backup.
After nandroid backup is done, reboot the device in fastboot mode again.
In the Command Prompt type following command: fastboot flash recovery recovery.img
BUt i didn't performed a nandroid backup and straight after fastboot boot recovery.img was done I typed fastboot flash recovery recovery.img.... and now nothing is happening so I quit command prompt and unplugged usb but still I cant do anything and the phone is stuck at fastbood mode. When i am trying to connect usb it's saying usb not recognized... PLEASE HELP ME!
PC is not detecting my phone now.

anuragvivek93 said:
Please help in big trouble.. my phone is stuck at Fastboot screen.. Nothing is working no volume keys nothing... What did i Do:
Unlocked bootloader...
and then I was trying to flash a custom recovery but after typing fastboot boot recovery.img.. it showed something like booting and then it finished.. Then in the tutorial it was written :
Perform a nandroid backup.
After nandroid backup is done, reboot the device in fastboot mode again.
In the Command Prompt type following command: fastboot flash recovery <name of recovery>.img
BUt i didn't performed a nandroid backup and straight after fastboot boot recovery.img was done I typed fastboot flash recovery recovery.img.... and now nothing is happening so I quit command prompt and unplugged usb but still I cant do anything and the phone is stuck at fastbood mode. When i am trying to connect usb it's saying usb not recognized... PLEASE HELP ME!
PC is not detecting my phone now.
Click to expand...
Click to collapse
Not sure what thread you are following.. but steps don't sound correct.
Depending on the hboot you are on the fastboot boot recovery.img.. doesn't work.
to flash recovery you should have used fastboot flash recovery recovery.img
what happens if you hold down volume button and power for 10-20secs will it reboot to bootloader? If so from bootloader hit the power button to get to fastboot USB then select reboot option.
If nothing is working other option let phone go flat, then recharge and try again.
Is your device s-off?

[Q] Phone is Dead :(

Ok, first off i was soff unlocked.. i then updated my phone to the latest OTA sense 6. I then tried to install customs roms which ended up not booting and forcing my phone to have no OS. so not being able to access the OS or sideloading roms, i tried RUUing but couldnt get the side to side error fixed. so then i continued to try and downgrade my firmware so i can ruu the official htc 3.xx one. as soon as i downgraded to hboot 1.55, my phone isnt recognized in fastboot anymore. so i can not access my phone from either adb or fastboot. anyone have any suggestions?

here you are
firespitta said:
Ok, first off i was soff unlocked.. i then updated my phone to the latest OTA sense 6. I then tried to install customs roms which ended up not booting and forcing my phone to have no OS. so not being able to access the OS or sideloading roms, i tried RUUing but couldnt get the side to side error fixed. so then i continued to try and downgrade my firmware so i can ruu the official htc 3.xx one. as soon as i downgraded to hboot 1.55, my phone isnt recognized in fastboot anymore. so i can not access my phone from either adb or fastboot. anyone have any suggestions?
Click to expand...
Click to collapse
I recently had the same issue, you should be able to fix this by following these steps, keep in mind, continuing this process will unroot your device. Thus, you will loose all of your data on your phone.
first begin by booting into bootloader, then plugging in your device via usb cable to your computer, it should now say "fastbootusb" on the device's screen.
if you don't already have the the fastbooot files required for your computer, you can download them here: ftp.qbking77.(com)/Files/OneDrivers_Fastboot.zip
after that, extract the zip file somewhere on your computer, and open the fastboot folder. Now hold down shift and click on an empty space in the folder and choose open new command window here, or something along those lines.
Now that you've done this, type fastboot oem lock and press enter, this will relock your phones bootloader.
Now, unplug your phone from usb, and reboot back into fastboot, and once again, plug the device into the computer. Just as before, your phones screen should now say fastboot usb. You can now flash this file via fastboot by following the instructions below.
androidfilehost.(com)/?fid=23329332407568410
rename the file downlaoded to firmware.zip and copy it to the folder containing your fastboot.exe file
now in the command prompt window, type in Fastboot oem rebootRUU
you should now see a black screen with the HTC logo, type Fastboot flash zip firmware.zip,
once that is complete, type fastboot reboot and once more, reboot into fastboot
you can now download this RUU file from the following link: androidfilehost.(com)/?fid=23329332407573774
extract the zip folder somewhere on your computer
boot into bootloader, and once again choose fastboot,
plug in your usb cable to your phone and computer, and the phone should once again say fastboot usb.
now open the folder you extracted and run ARUWizard.exe, this will unroot your device and return you to stock.
now, if you wish, you may re root your device.
Hope this works, if none of this makes sense, mention it. I typed this up in a bit of a rush.
also, you will have to copy and paste the links, as I have not made 10 general posts, so I can't add direct links to my post. Sorry mate.
as far as your fastboot issue, try re installing the htc and fastboot drivers.

Troubles with my HTC One Mini 2

Hey,
My phone is stuck in the fastboot mode, without any OS, nothing works... no Recovery ,...
S-ON, no-debugging usb, Bootloader locked and can't unlock him... I already tried with htc-dev, everything works but nothing appair on my screen to confirm the unlocking.
I'm really stuck, searched lot of things on google, ....
I used fastboot, and ADB, the first one recognize my device, but the last one not. I can't boot on RUU mode neither.
Any ideas?

AzweL said:
My phone is stuck in the fastboot mode, without any OS, nothing works... no Recovery ,...
Click to expand...
Click to collapse
The very first thing I recommend you to do, is to download the right recovery and install it via command
Code:
fastboot flash recovery recovery.zip
Let me know if you run into any further troubles.

AzweL said:
Hey,
My phone is stuck in the fastboot mode, without any OS, nothing works... no Recovery ,...
S-ON, no-debugging usb, Bootloader locked and can't unlock him... I already tried with htc-dev, everything works but nothing appair on my screen to confirm the unlocking.
I'm really stuck, searched lot of things on google, ....
I used fastboot, and ADB, the first one recognize my device, but the last one not. I can't boot on RUU mode neither.
Any ideas?
Click to expand...
Click to collapse
Hi,
Frist in boot loader check your OS version it should be something like 2.19.401.2 or lower than this.
NB: ALWAYS TRY WITH MORE THAN 75% BATTERY, AND THAT FOR ANY CODE TO WORK PROPERLY, MAKE SURE TO SELECT FASTBOOT BY POWER KEY IN BOOTLOADER
Anyway, if you can enter fastboot, then you have some chance of recovering your device and because you have S-Off it is going to be a bit difficult.
First download this stock boot file : https://mega.nz/#!lEAVwRSL!wrP2hi6GEYLeJaPf2ssZo9wCtSi7E4yfyUHgh3Q3XSs
Then place this file in the ADB folder, then run command :
To flash boot file command is:
Code:
- Fastboot Devices (this command is important to know if the device is connected and accepting and responding commands)
- fastboot flash boot boot_signed.mg (assuming this is the name you saved the file with)
- fastboot reboot bootloader
Also download Stock Recovery: https://mega.nz/#!gVJE1Bxa!6SwXStAD8p-XlnQiPkRcdNo_ITFD1ykn-tN6wIBVi1I
Place this in ADB folder and run command:
Code:
fastboot flash recovery stockrec.img // (assuming that is the name you have saved the file with), only after flashing this you will know if the device has any OS, if OS exists it will boot up.
fastboot erase cache
Attempt and let us know how it went...Good Luck

Question [Fixed] ASUS logo stucks on recovery, only access to bootloader

Hi all,
I'm encountering a very annoying issue with my brand new Zenfone 8.
I wanted to install the last LineageOS image, but now my phone seems stuck.
Here are what I did:
- Unlocked the bootloader: success with the ASUS APK after a few tries (error 11000 and 11006 ans eventually worked).
- Rebooted to bootloader
- Entered into recovery
- Used fastboot to flash the vendor partition.
At this point, everything looked OK. But then.... :
- Powered off the phone and restarted to bootloader.
- Tried to enter into recovery to flash the Lineage Recovery
But at this point, I had a ASUS logo stucked on the screen.
I can't do anything with adb or fastboot commands.
I tried the method explained here (https://www.asus.com/Content/Android-13-Beta/) to rollback to stock Android 12, but nothing happened too: I looked at the shell script (I'm on Linux) and I reckon that it stucks on fastboot command (the phone is in the bootloader).
Any idea about what failed? The last command used (vendor partition flash) said "OKAY".
And especially, what can I do now? Any way to reinstall the ASUS recovery?
Thanks in advance guys.

Not quite sure what your status is if you say "can't do anything with adb or fastboot commands". I've flashed Zenfones a couple of times (my household has 3 Zenfone 8's on LineageOS) and I had one that went into ramdump. I recovered from that using fastboot to manually reflash all 19 firmware partitions, in both slots. That got the phone out of ramdump, and I got to continue the upgrade to the new LineageOS. So: if you can boot to the fastboot environment, then that would be a road that might leaed you out. But if you can't even get a response to the command "fastboot devices" then I don't know of a course of action for you.

To use fastboot commands I had to run the phone into bootloader mode, then to "recovery" and eventually "fastboot" (I'm note 100% sure but it's what I remembered).
Without that, I was unable to use any fastboot commands like device or flash.
And now the issue is that I'm not able to go to recovery/fastboot again, because I have just the ASUS logo and nothing else.
It looks like that the stock recovery was dead, but I don't know why - and I don't know how to fix/reset it.

From the bootloader you should be able to flash the raw image again, it should flash everything

Adaoh said:
From the bootloader you should be able to flash the raw image again, it should flash everything
Click to expand...
Click to collapse
Good to know - but with which commands/tools?
As I said, I was unable to use fastboot commands from my computer on the Zenfone bootloader.
On the bootloader page, I just have "waiting for devices" and noting else. I had to go into the recovery > fastboot to make the commands work.

semurel said:
Good to know - but with which commands/tools?
As I said, I was unable to use fastboot commands from my computer on the Zenfone bootloader.
On the bootloader page, I just have "waiting for devices" and noting else. I had to go into the recovery > fastboot to make the commands work.
Click to expand...
Click to collapse
On Linux and maybe macs too you need to run fastboot commands as Root (sudo fastboot devices) for example. The raw image script should ask you for your Root password for this reason

Yes I know - I well used sudo for all commands.
The ASUS script asks me for password but then does absolutely nothing - not even a print. I waited a few minutes and finally canceled.
For you, fastboot commands should work on the bootloader screen? (I ask that because the script starts by a fastboot command).

semurel said:
Yes I know - I well used sudo for all commands.
The ASUS script asks me for password but then does absolutely nothing - not even a print. I waited a few minutes and finally canceled.
For you, fastboot commands should work on the bootloader screen? (I ask that because the script starts by a fastboot command).
Click to expand...
Click to collapse
Yes, they work from the bootloader, I always run the script from the BL too. Ironically, I had issues running fastboot commands from fastbootd for installing Omnirom, so I did it all in the bootloader and all worked fine.
I am not sure I can help you more at this point, it looks like it maybe got interrupted mid flashing and now something is wrong somewhere. Maybe if you look inside the bash script file you can find the command that it got stuck on and run that manually if you manage to get fastboot command access.

Strange - they have never worked from the bootloader. I tried that before according to the LineageOS wiki. I thought it was a mistake and use the recovery > fastboot to do that. I dont like that - I hope it's not a local version of the Zenfone or something like that.
I'm not at home tonight but yes I'll try to find commands not requiering the fastboot command.

Unfortunately all commands from the script are using fastboot. And as "fastboot devices" sees nothing, I can't do anything.
I've tried from the bootloader screen (with start, recovery, poweroff option) - from the start screen showing unlocked bootloader warning and from the ASUS logo when I try to start the recovery. I've tried the commands/scripts with Linux and Windows: same result.
So :
- I can't use any fastboot commands.
- I don't have the ASUS recovery.
Speaking of the ASUS recovery, I've found screenshots on internet and they don't have a "fastboot" submenu (I'm not sure it's a Zenfone 8). May had I a different version?
I don't like that. If I don't have others option, I guess that the warranty doesn't work because the phone is unlocked?

I eventually found a solution! I've tried with my old OnePlus cable and fastboot commands start working from the bootloader screen.
I have no idea why my other cable was faulty (it can charge the phone and executes commands from the Recovery > Fastboot menu - but not on the BL screen).
Anyway my problem is now fixed.
Thanks all for help and support.