Database Develop

help with unlocking the bootloader and rooting the latest version H811-20p

Hi,
I looked all over the place but could not find a way to unlock the bootloader of the latest version of my device. Currently running Android 6.0 H81120p and rooting this version as well!

hammy88 said:
Hi,
I looked all over the place but could not find a way to unlock the bootloader of the latest version of my device. Currently running Android 6.0 H81120p and rooting this version as well!
Click to expand...
Click to collapse
i recommend for you to KDZ 20p refurbished..
and heres the instruccions same as 20i
http://forum.xda-developers.com/tmobile-g4/development/stock-h811-20i-images-kdz-flashable-t3308227

i tried but its not working as i get stuck on waiting for device after i type the command to reboot to bootloader, installed google usb drivers , lg drivers and all but nothing seemed to be fixing the issue

hammy88 said:
i tried but its not working as i get stuck on waiting for device after i type the command to reboot to bootloader, installed google usb drivers , lg drivers and all but nothing seemed to be fixing the issue
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did you click on screen when you gave the command to go into fastboot it shows some sort of numbers and leters and asks you if you want to allow phone .??/ did you

Yes I did allow the computer to have access to the phone, when i typed the command to reboot to bootloader it did, but then when i type the command to fastboot oem unlock it gets stuck on waiting for any device. I tried doing it again just to check, after i get to bootloader, i typed adb devices it doesn't show any device thats connected

hammy88 said:
Yes I did allow the computer to have access to the phone, when i typed the command to reboot to bootloader it did, but then when i type the command to fastboot oem unlock it gets stuck on waiting for any device. I tried doing it again just to check, after i get to bootloader, i typed adb devices it doesn't show any device thats connected
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adb reboot bootloader (phone reboots to bootloader)
fastboot oem unlock (this wipes ALL data!!)
debugging tick and unlock oen in dev options.?

raptorddd said:
adb reboot bootloader (phone reboots to bootloader)
fastboot oem unlock (this wipes ALL data!!)
debugging tick and unlock oen in dev options.?
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Click to collapse
I checked the oem unlock, and the USB debugging thing is checked as well. Developers Options is on but same issue. I installed the latest USB drivers, installed Google USB drivers. I went to device Manger and I can't see that my device is even connected!

hammy88 said:
I checked the oem unlock, and the USB debugging thing is checked as well. Developers Options is on but same issue. I installed the latest USB drivers, installed Google USB drivers. I went to device Manger and I can't see that my device is even connected!
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can try another computer maybe. i use the drivers from LGUP..
am afraid i do not know how to proceed from here. am pretty sure you are not alonei gave read someting similar but.. i didnt pay attention

I tried 3 other computers , did not help resolve the issue

hammy88 said:
I tried 3 other computers , did not help resolve the issue
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Click to collapse
i came across this try it.
http://forum.xda-developers.com/showpost.php?p=69339003&postcount=2

Use Linux dude, also try different cables. My stock g4 came with a bad cable that only charged.

I've had exactly the same problem as hammy88. Is what is referred to as "fastboot mode" the same as download mode? I know it's relatively easy to get into download mode. But "adb reboot bootloader" doesn't work for me.

Fastboot mode ≠ Download mode
If you did tick "Enable OEM unlock" , and adb reboot bootloader doesn't work, then I guess is BL is locked now.

I tried the method , i found that Android Bootloader does not have a green light, so i went to device manager to try to update the driver but it wasn't even there, clicked on view to show the hidden items or whatever then found android device, when i clicked update the driver i could not find the Google fastboot thing to update it with, all i got was either LG usb or ADB interface even thoough i downloader google fastboot usb drivers few days ago

hammy88 said:
I tried the method , i found that Android Bootloader does not have a green light, so i went to device manager to try to update the driver but it wasn't even there, clicked on view to show the hidden items or whatever then found android device, when i clicked update the driver i could not find the Google fastboot thing to update it with, all i got was either LG usb or ADB interface even thoough i downloader google fastboot usb drivers few days ago
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Click to collapse
Brother, be calm. Find the fastboot drivers. And update.
You will figure it out. Just do it.

Cant use fastboot or mfastboot

Im trying to flash back to stock rom but the device is not responding, i already have try on mfastboot and on fastboot but it just say "waiting for device" when i try some comand, i have motorola drivers, i've tryed a program called PDAnet too, i have usb debug on, can someone help-me?

are you using Windows 7/8/10 ?
did you boot into bootloader mode?
(adb debug mode is for adb and bootloader mode is for fastboot)
interaction is: adb reboot bootloader (when device is on and adb debug is on)

zitronenmelissa said:
are you using Windows 7/8/10 ?
did you boot into bootloader mode?
(adb debug mode is for adb and bootloader mode is for fastboot)
interaction is: adb reboot bootloader (when device is on and adb debug is on)
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i have tryed all, but no response, i give it up and install other custom rom but thanks for trying help

unlock bootloader

With your phone on, make sure under developer options oem unlocking is allowed. . .
Then plug in the device to the computer....
Time for the fun to begin....
In ADB
Adb reboot bootloader (it takes your phone to bootloader mode)
Fastboot flashing unlock (warns you not to)
Click Yes when prompted on phone. (YAY!!!)
Please don't forget to save anything you need from ur phone , unlocking your bootloader will fully wipe your device ?

Quick question, Is it supposed to just be text on the bottom left that says fastboot mode?. I've done this on a couple of other phones but this is the first time I haven't seen a menu, also when I run fastboot flashing unlock I'm stuck on fastboot flashing unlock.

TheRedPandaSSN said:
Quick question, Is it supposed to just be text on the bottom left that says fastboot mode?. I've done this on a couple of other phones but this is the first time I haven't seen a menu, also when I run fastboot flashing unlock I'm stuck on fastboot flashing unlock.
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Click to collapse
Yes fastboot mode ... On the left bottom.
Do u have mediatek drivers installed ?
Did u go into developer options and click on the allow oem unlocking ?

greeneyez15o said:
Yes fastboot mode ... On the left bottom.
Do u have mediatek drivers installed ?
Did u go into developer options and click on the allow oem unlocking ?
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I believe I have them installed but I'll try again, thanks.

TheRedPandaSSN said:
I believe I have them installed but I'll try again, thanks.
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Edit: I've tried a couple of drivers but none seem to work.

TheRedPandaSSN said:
Edit: I've tried a couple of drivers but none seem to work.
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Click to collapse
https://androidmtk.com/download-mtk-driver-auto-installer
Try this

Tied all sorts of drivers but no luck. I'm stuck in fastboot <waiting for device>. Any suggestions?

USB debugging
ycgr2002 said:
Tied all sorts of drivers but no luck. I'm stuck in fastboot <waiting for device>. Any suggestions?
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Have you enabled USB DEBUGGING?

ycgr2002 said:
Tied all sorts of drivers but no luck. I'm stuck in fastboot <waiting for device>. Any suggestions?
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Here

fastboot does not respond to commands
brunkonjaa said:
Here
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Same issues, run adb reboot bootloader and reboots but in funky fastboot. When sending fastboot commands such as fastboot devices nothing happens its not responding. Also if you get into fastboot via power and volume up, and connect to pc and try to run any fastboot commands no response back.

jackmaddy said:
Same issues, run adb reboot bootloader and reboots but in funky fastboot. When sending fastboot commands such as fastboot devices nothing happens its not responding. Also if you get into fastboot via power and volume up, and connect to pc and try to run any fastboot commands no response back.
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Turn on your phone, and do not connect to pc. Revoke USB debugging authorisation. Disable USB debugging. Enable USB debugging. Now connect your phone to pc. You should get a message on your phone about allowing USB debugging from that pc. Click don't ask again and then yes.
If you don't get that message try accessing phones storage through pc , that should prompt the phone to ask you about allowing USB debugging from that pc.
So click yes.
Now you should be able to run fastboot commands without problems.

brunkonjaa said:
Turn on your phone, and do not connect to pc. Revoke USB debugging authorisation. Disable USB debugging. Enable USB debugging. Now connect your phone to pc. You should get a message on your phone about allowing USB debugging from that pc. Click don't ask again and then yes.
If you don't get that message try accessing phones storage through pc , that should prompt the phone to ask you about allowing USB debugging from that pc.
So click yes.
Now you should be able to run fastboot commands without problems.
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No, sorry that is wrong.
ADB permission is not needed for fastboot. These are 2 different programs, with different protocals .
The fact there is no response from phone when in fastboot is a sign that pc drivers are not correctly installed, or the fastboot program needs to be updated.

mrmazak said:
No, sorry that is wrong.
ADB permission is not needed for fastboot. These are 2 different programs, with different protocals .
The fact there is no response from phone when in fastboot is a sign that pc drivers are not correctly installed, or the fastboot program needs to be updated.
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You are absolutely right. Thanks for clarifying the issue. Spot on !!

Boooader locked in developer options but root working fine

Developer option shows bootloader as locked but after reboot bootloader shows as unlocked . twrp working but Fastboot not working so I'm afraid I might brick my device as I can't flash fastboot rom. Please help.

I wanna know what you mean by 'Fastboot not working'. Does it mean you can't boot into fastboot mode, or does it mean you can't access fastboot commands on your pc?
Also i wanna know, while unlocking Bootloader. Did you used commands
Code:
fastboot oem unlock
and
Code:
fastboot oem unlock_critical
?

The device does boot into fastboot but doesnt respond to any fastboot command
It doesn't even show up on typing fastboot device
I unlocked the bootloader using miunlocktool
But the device doesnt even show up in the tool

pythonner said:
The device does boot into fastboot but doesnt respond to any fastboot command
It doesn't even show up on typing fastboot device
I unlocked the bootloader using miunlocktool
But the device doesnt even show up in the tool
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If it's not responding to fastboot commands I worry that if correct drivers are installed on your pc.
Plug-in ur device while in fastboot mode to your pc.
Open Mi Unlock tool(this works very first time, you don't even have to install this tool). There's a setting icon on top right corner.
A dialogue box will appear, displaying to install drivers.
Install 'em. It will ask you to remove and plug-in your device again.
Now, download the platform tools file.
Open cmd in the platform tools folder.
Now try using fastboot commands.

It's same for me.
You can ignore that safely.

eleven.co said:
If it's not responding to fastboot commands I worry that if correct drivers are installed on your pc.
Plug-in ur device while in fastboot mode to your pc.
Open Mi Unlock tool(this works very first time, you don't even have to install this tool). There's a setting icon on top right corner.
A dialogue box will appear, displaying to install drivers.
Install 'em. It will ask you to remove and plug-in your device again.
Now, download the platform tools file.
Open cmd in the platform tools folder.
Now try using fastboot commands.
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I updated the usb driver but unlock tool can't even detect the devices and when I type fastboot devices in platform tools the device is also not detected
I'm afraid of installing custom roms because if I brick it I will not be able to even flash the official fastboot rom

VD171 said:
It's same for me.
You can ignore that safely.
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Click to collapse
Actually when I type fastboot devices in platform tools the device is not even detected. So I'm afraid that if I flash custom rom and brick it I will be unable to flash even the official fastboot rom.

pythonner said:
I updated the usb driver but unlock tool can't even detect the devices and when I type fastboot devices in platform tools the device is also not detected
I'm afraid of installing custom roms because if I brick it I will not be able to even flash the official fastboot rom
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Click to collapse
Boot your phone, connect through USB to PC. Now check in Windows File Explorer. Is your device visible there?
If not, open Device Manager and you'll find something with the name adb (You can go through this guide). In my case it was under Acer. Just update those drivers manually and see if your device is visible now.

eleven.co said:
Boot your phone, connect through USB to PC. Now check in Windows File Explorer. Is your device visible there?
If not, open Device Manager and you'll find something with the name adb (You can go through this guide). In my case it was under Acer. Just update those drivers manually and see if your device is visible now.
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the devices shows up in file explorer and device manger when its turned on but after putting in fastboot mode the platform tools cant detect the device

pythonner said:
the devices shows up in file explorer and device manger when its turned on but after putting in fastboot mode the platform tools cant detect the device
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This is sad. Try fiddling around. I am unable to identify what could be the possible reason behind non-detection of device over platform tools as there are many. Maybe go through this article. It has various methods to fix non - detection of device.

eleven.co said:
This is sad. Try fiddling around. I am unable to identify what could be the possible reason behind non-detection of device over platform tools as there are many. Maybe go through this article. It has various methods to fix non - detection of device.
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Now developer options is showing as unlocked and adb is also working good
but fastboot is still not working when I type fastboot devices It returns nothing

eleven.co said:
This is sad. Try fiddling around. I am unable to identify what could be the possible reason behind non-detection of device over platform tools as there are many. Maybe go through this article. It has various methods to fix non - detection of device.
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Click to collapse
What could be possible explanation to adb working but fastboot not working. The usb cable is tight and bootloader is unlocked even in developer options

eleven.co said:
This is sad. Try fiddling around. I am unable to identify what could be the possible reason behind non-detection of device over platform tools as there are many. Maybe go through this article. It has various methods to fix non - detection of device.
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I just realised that I flashed twrp using the root app flashify. Could that be the reason for root not working

VD171 said:
It's same for me.
You can ignore that safely.
Click to expand...
Click to collapse
If you're rooted and have magisk hide enabled, it's normal, Magisk spoofs locked bootloader to pass safetynet in MIUI

Unlocking bootloader issues

I'm having issues unlocking my bootloader on my new Pixel 4XL after following the pretty cut and dry instructions. I turn on OEM unlocking to allow the bootloader to be unlocked. I turn on USB debugging. I type a command in the PowerShell of SDK tools ./adb reboot bootloader. It takes me to the fastboot screen of the Pixel. But from there nothing else works. I type ./fastboot devices or ./fastboot flashing unlock, which returns waiting for any device or it doesn't return anything. It just goes back to the original command prompt. Device status says Locked in green. So I'm not sure why it won't unlock. Anyone have any suggestions?

JimmyL216 said:
I'm having issues unlocking my bootloader on my new Pixel 4XL after following the pretty cut and dry instructions. I turn on OEM unlocking to allow the bootloader to be unlocked. I turn on USB debugging. I type a command in the PowerShell of SDK tools ./adb reboot bootloader. It takes me to the fastboot screen of the Pixel. But from there nothing else works. I type ./fastboot devices or ./fastboot flashing unlock, which returns waiting for any device or it doesn't return anything. It just goes back to the original command prompt. Device status says Locked in green. So I'm not sure why it won't unlock. Anyone have any suggestions?
Click to expand...
Click to collapse
Try using command prompt instead of PowerShell.
Try using a different cord.
Try using a different USB port.
Make sure your Platform Tools are up-to-date.
Make sure USB drivers are up-to-date.
fastboot flashing unlock should work