How to unlock Android Bootloader using ADB & Fastboot


How to unlock Android Bootloader using ADB & Fastboot

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Video Transcript

00:10
In this video tutorial, I’m going to explain how to unlock the bootloader for an Android device

00:16
using your ADB and fastboot

00:18
You need to unlock the bootloader in order to be able to write images via Fastboot or via the bootloader

00:25
Before you can unlock the bootloader, you need to have enabled

00:30
USB debugging and OEM unlocking so you go under Settings

00:35
And you scroll down to About and

00:39
Then scroll down to Build Number. Keep tapping till you see You are now a developer, just keep tapping build number

00:46
All right. I already did that?

00:50
Once you’ve done that, you go back and should have developer options enabled here

00:55
You should see that here. So you select developer options.

00:59
Now you scroll down here and you enable USB debugging. I already have that enabled.

01:05
You might get a prompt asking you to always allow. Just tick and allow.

01:11
Then you also enable OEM Unlocking.

01:15
Its very important you enable this in order to unlock the bootloader?

01:19
Now, once you have USB Debugging and OEM Unlocking enabled

01:23
make sure you’ve setup ADB on your PC and then we can return to unlocking the bootloader

01:32
Now, in ADB, you need to test ADB connection by typing adb devices

01:44
and you have a detection. You are going to boot the device into bootloader or fastboot by typing adb reboot-bootloader

01:53
and you tap enter so that’s going to boot the device into

02:02
Fastboot and you should see

02:05
a black screen with fastboot written somewhere on the screen. In fastboot, test connection by typing

02:13
fastboot devices

02:16
Now, you want to unlock by typing fastboot. (don’t forget that the command might vary)

02:23
fastboot oem unlock

02:25
For some devices, its fastboot flashing unlock , fastboot oem unlock-go or something like that

02:32
but just try this command first and research other commands if this one fails fastboot oem unlock.

02:38
Tap Enter. Now in the screen, you’re going to get a prompt asking you to press the volume up

02:43
if you want to unlock or volume down if you want to cancel so I’m going to tap the

02:49
volume

02:51
increase

02:52
button, and then

02:54
wait while the

02:56
bootloader gets unlocked

03:07
So I see unlock pass returning to fastboot . For me to confirm that my bootloader has been unlocked, I type

03:17
fastboot gervar unlocked

03:23
And I see unlocked: Yes, so my bootloader has been unlocked. That’s how to unlock the bootloader of an Android device

03:30
using your ADB and fastboot .

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Have any Question or Comment?

40 comments on “How to unlock Android Bootloader using ADB & Fastboot

It says tht unlock failed in 0.006 sec… How to fix this sir… Plss help. Me my phome is vivo b15 pro

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Hovatek, I am getting the error "access denied" once I try to fastboot devices. I am attempting to downgrade my S9; the One UI Is AWFUL. I've come to THIS step because when I attempt to flash it in Odin, I get the error "auth failed" and OEM unlock is NOT an option. I'm afraid my phone has the highest level of protection. It still has the Samsung Official binary. If the new update wasn't terrible, I wouldn't need to do this! I need to somehow disable security or "trick" my phone that appears to be loaded with preventative methods.

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not all device has OEM unlocking in developer, including me.

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FAILED (remote: 'Token verification failed, reboot the device') Remdi 7

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This is working on hmd Nokia bro?

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Do you need bootloader unlock code then paste please tell do I need to paste the code

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cant unlock xaomi black shark :c need help

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It shows no devices when I type fastboot devices, any ideas why? (I have an xperia z3)

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Zte blade l7 no unlock bootloader 🙁

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phone must be rooted?

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FAILED (remote: argument size is wrong

)

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FAILED (remote: Token verification failed, reboot the device)

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Hi,

I have already disabled oem protection on the developer tools, now when I type the "fastboot.exe oem unlock" command, I get this message "FAILED (remote: 'not allowed in locked state')",

Can you help please ?

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Why do we need to use adb and put those commands if the OEM Unlock option does exist ?
I mean i came here to learn how to Unlock OEM via adb if the option doesn't exis..

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Thank you very much it worked perfectly

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Oem unlocking option is not there . I am using vivo x5 max. Pls help

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What Do I Do? If My Mobilr Stucks In Fastboot Mode? My Mobile Model Is Lava Z61… Why is it stucking like that?

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FAILED (remote: unknown command) please any one help me ??

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Is there any chances of hard brick with this method????????
Please reply………..

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OEM unlock option is not there
im using asus zenfone max m1

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thanks bro it helped me

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How prevent anyone to unblock my phone using fastboot/ADB. I enable to insert password b4 booting.
And can you make a video on how to prevent any to change your phone imei after it stole so he can easily be track

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I tried fast boot flashing unlock it shows ok but how to know it is unlocked or not

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Oem unlocking option is greyed out ..how to unlock bootloader and how to root?

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I am facing a problem.
While the phone says to press volume up for Yes, it doesn't work.

Pressing volume down for No works.

I am using Panasonic Eluga Ray 700.

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Love the accent lol

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please put the adb codes in the video description.

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I Try this LG Stylo 4 ( Sprint ) But cant find " OEM Unlock Command " ……..

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What are my options if i cant turn on Debugging and OEM unlocking as i don't have access to the OS?

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I tried, fastboot oem unlock, fastboot flashing unlock, fastboot orm unlock-go,.. but it says "failed unknown command. Also I used many other tools too but failed 🙁

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my oppo f1 just restarts no fastboot screen
help pls

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Hey bro nice video ha,
On many ways I tried to unlock bootloader of my motorola " Droid Turbo xt 1254"
Iroot, king root, online root , Twrp recovery installing couldn't succeed, and
I also tried Motorola official methood to unlock bootloader there motorla message occurred" your device is not supported for unlocking.
I am very poor man i can't buy new phone ,please help me to unlock bootloader and root my mobile to uninstall unnecessary System apps to save Battery.
Because here no battery and parts available of my mobile.
Thank you.

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I want unlock my device swipe elite but there is no OEM option deplores menu please tell tips how to fine and unlock

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What happens if that method doesn't work? Is that secure? (I don't want my smartphone bricked)

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I tried, fastboot oem unlock, fastboot flashing unlock, fastboot orm unlock-go,.. but it says "failed unknown command. Also I used many other tools too but failed.
Customer services doesnt reply too. Smartphone name- Comio P1 (Nougat).

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This method Can unlock Xiaomi Boatloader without permission?

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