I have a G4 h811
it respond to ADB commands but not to fastboot commands
i get waiting for device message
so i tried power plus volume up
nothing...
power plus volume down
nothing...
if i type adb devices command
i can see my h811 as a valid device so adb works
but
the only thing that kind of works for the fastboot is to get in to adb and send this command
adb reboot bootlader
phone reboots and get the LG life is good logo and on th etop left i get little fonts
that says
******************
Welcome to Fastboot mode for OEM bootlader unlock
* Quick guidance
1) how to unlock : fastboot oem unlock
****************************
Si when i send the command
fastboot oem unlock
i get
<waiting for device>
nothing happens
and my phone wont turn off if i press the power button for more than 10 seconds
i need to remove battery to turn off
reinstall battery and boot up normally with the LG then tmobile logos
any clues ?
Max.
maxolini said:
I have a G4 h811
it respond to ADB commands but not to fastboot commands
i get waiting for device message
so i tried power plus volume up
nothing...
power plus volume down
nothing...
if i type adb devices command
i can see my h811 as a valid device so adb works
but
the only thing that kind of works for the fastboot is to get in to adb and send this command
adb reboot bootlader
phone reboots and get the LG life is good logo and on th etop left i get little fonts
that says
******************
Welcome to Fastboot mode for OEM bootlader unlock
* Quick guidance
1) how to unlock : fastboot oem unlock
****************************
Si when i send the command
fastboot oem unlock
i get
<waiting for device>
nothing happens
and my phone wont turn off if i press the power button for more than 10 seconds
i need to remove battery to turn off
reinstall battery and boot up normally with the LG then tmobile logos
any clues ?
Max.
Click to expand...
Click to collapse
Are you using a usb 2.0 or 3.0 port? You should use a 2.0 port.
Also try disabling windows 10 driver signature enforcement.
SOLVED..
I was on a win7 computer... never worked somehow
switched to a Win10
and worked like a charm...
twrp installed and rooted
using this guide
http://forum.xda-developers.com/tmobile-g4/development/stock-h811-20i-images-kdz-flashable-t3308227
So i followed this guide to root my Mi A2 "theandroidsoul (insert dot here) com/xiaomi-mi-a2-root/"
It went all fine but the phone was still not rooted. So i thought maybe get the newest Magisk.zip wich i put on the phone.
So I went back to step 11. to install the new version with TWRP but it didnt go to TWRP although i held the volume up butten and then used the command "fastboot reboot" and then it weent into bootloop
so i Guess i am stuck on my Partition A (in my case) where i installed TWRP but i cant shut the phone dont to get into fastboot and ADB says Error: no device Found".
I Need Help plssss :crying:
If you cant go to fastboot then you need open up phone and use testpoint to force edl mode
But before that hold volume down and power for 10-15 sec to force fastboot
The battery is drained now, i tried to plug it in to the wall and boot into fastboot right away, i saw the fastboot screen for a splitsec but it cut off because it had not enough charge, so i left it plugged in and tried to go to fastboot constantly till the phone had enough charge to hold the boot, i was in fastboot for about 1 minute or so (my plan was to charge it in fastboot mode, leave it like that and then go to the pc to change the active partition back, but the pc didnt recognise the phone) but after that it startet bootlooping again while it was in fastboot.
Could i try to got to TWRP with "volume up + power button" ? and change the active partition in there?
Facing almost similar problem like you yesterday.
Try method I post here
https://forum.xda-developers.com/mi-a2/how-to/ota-v9-6-5-0-odimife-t3823445/page24
1. Have phone in fastboot mode
2. Launch adb cmd (NOT your pc usual cmd)
3. Connect to pc, type 'fastboot devices'
I have the lastest update MR3 so I wanted to flash back to MR2 but everytime I tried to flash_all My phone just restart and get stuck on boot logo, I understand I have to have bootloader unlock, something that I have but everytime I tried to do fastboot flashing unlock_critical Its just restart and get stuck on boot logo, So i dont know what to do sorry for bothering about, but would like some help with it. just adding it say fail write to device on cmd.
Tried too from recovery mode to do adb sideload the firmware, its start but on the phone while been on recovery mode it say installation aborted and gives error 21
https://developer.razer.com/razer-p...165.814666719.1585935357-594647775.1575189888
Unlocking the Bootloader
Enable OEM Unlocking
If necessary, enable OEM unlocking on the Razer Phone:
On Android 7.x, go to Settings > About phone > tap Build number seven (7) times.
Tap the back button once you see the “You are now a developer” message appear.
Tap Developer options, tap toggle OEM unlocking to enable.
On Android 8.x, go to Settings > System > About phone > tap Build number seven (7) times.
Tap the back button once you see the “You are now a developer” message appear.
Tap Developer options, tap toggle OEM unlocking to enable.
Enter Download Mode
Start the Phone in Download Mode with one of the following methods:
Using the adb tool: With the Phone powered on, execute: adb reboot bootloader
Enter Download Mode: Plug in a USB cable to connect your Razer Phone to your computer, Power Off the Phone, then turn it on and immediately press and hold the Volume Down button until “Download Mode” appears on screen.
Unlock the Bootloader
Run this command: fastboot flashing unlock
Your Razer Phone will show you a confirmation screen. Use the Volume Up/Volume Down buttons for navigation, and press the Power button to select. Your Phone will reboot.
⚠ Caution: This command erases all user data on the Phone.
Unlock the Bootloader Critical Partitions
Enter Download Mode: Plug in a USB cable to connect your Razer Phone to your computer, Power Off the Phone, then turn it on and immediately press and hold the Volume Down button until “Download Mode” appears on screen.
The unlock can be performed with this command: fastboot flashing unlock_critical
Your Razer Phone will show you a confirmation screen. Use the Volume Up/Volume Down buttons for navigation, and press the Power button to select. Your Phone will reboot.
bsg19071979 said:
https://developer.razer.com/razer-p...165.814666719.1585935357-594647775.1575189888
Unlocking the Bootloader
Enable OEM Unlocking
If necessary, enable OEM unlocking on the Razer Phone:
On Android 7.x, go to Settings > About phone > tap Build number seven (7) times.
Tap the back button once you see the “You are now a developer” message appear.
Tap Developer options, tap toggle OEM unlocking to enable.
On Android 8.x, go to Settings > System > About phone > tap Build number seven (7) times.
Tap the back button once you see the “You are now a developer” message appear.
Tap Developer options, tap toggle OEM unlocking to enable.
Enter Download Mode
Start the Phone in Download Mode with one of the following methods:
Using the adb tool: With the Phone powered on, execute: adb reboot bootloader
Enter Download Mode: Plug in a USB cable to connect your Razer Phone to your computer, Power Off the Phone, then turn it on and immediately press and hold the Volume Down button until “Download Mode” appears on screen.
Unlock the Bootloader
Run this command: fastboot flashing unlock
Your Razer Phone will show you a confirmation screen. Use the Volume Up/Volume Down buttons for navigation, and press the Power button to select. Your Phone will reboot.
Caution: This command erases all user data on the Phone.
Unlock the Bootloader Critical Partitions
Enter Download Mode: Plug in a USB cable to connect your Razer Phone to your computer, Power Off the Phone, then turn it on and immediately press and hold the Volume Down button until “Download Mode” appears on screen.
The unlock can be performed with this command: fastboot flashing unlock_critical
Your Razer Phone will show you a confirmation screen. Use the Volume Up/Volume Down buttons for navigation, and press the Power button to select. Your Phone will reboot.
Click to expand...
Click to collapse
Thank you for your response but exactly thats what I do and the razer phone after having to use the compatibility patch for the newest update to MR3, everytime i try to unlock critical just restart and then gets stuck on razer logos
EliasEscolero said:
Thank you for your response but exactly thats what I do and the razer phone after having to use the compatibility patch for the newest update to MR3, everytime i try to unlock critical just restart and then gets stuck on razer logos
Click to expand...
Click to collapse
1. unlock in bootloader
2 unlock critical
bsg19071979 said:
1. unlock in bootloader
2 unlock critical
Click to expand...
Click to collapse
The phone is already unlocked but cant do the unlock_critical because it just restart and on cmd say " FAILED (Write to device failed (Unknown error))
fastboot: error: Command failed"
Wanted to add that even when I try to lock the bootloader it say Fail to on cmd and the phone just restart
So after unlocking my Reno 3 bootloader with Unofficial way (with mtkclient ) i have this message when phone is booting "dm-verity corruption
Your device is unlocked and can't be trusted to continue press the power button "
And the phone is working fine and bootloader status in " developer option ==> oem unlock " is UNLOCKED
the problem here is I can't access fastboot mode or recovery mode but i can enter EDL or BROM mode.
So the question is there is anyway to access fastboot?
Ps : i tried adb command
" Adb reboot bootloader & adb reboot fastboot "
But the phone reboots to normal
2- When i press volume - & power the phone keeps vibrating like he is rebooting again and again
NOTE that i remove my hand off the power button after the first vibration.
Same problem
I am having trouble unlocking my bootloader. I have enabled it in the developer options and boot it in to download mode using the fastboot command and it just stays in download mode, I've tried different combinations of holing down the volume keys like I read somewere and also my adb disconnects so I cant do the oem unlock command,. Any help plz ?