How to Relock Bootloader on the Oneplus 3

[GCbard]

There seems to be guides for how to unlock and root the oneplus 3 but no real way that explains how to lock the bootloader again. I just did and will these sets of instructions. I was nervous about doing it since I read a lot about how some people had issues. I did it this way and had no issue. Also, my thoughts were confirmed ahead of time by a pots I found by nightfox7. So here it is laid out.


This is assuming your on a custom rom and/or rooted.

1. download latest oxygenos full rom (full stock rom)
2. flash via TWRP (this shoud replace TWRP with stock recovery)
3. If stock recovery is not replaced be sure to flash it from the bootloader
4. Go ahead and load the full stock rom again vis adb sideload in the stock recovery
4. boot your phone and be sure that your phone is set to usb debugging.
5. boot into bootloader and lock bootloader via the following command
fastboot oem lock


It worked for me. But I'm not responsible if you have problems

 

[Lowxorx]

There seems to be guides for how to unlock and root the oneplus 3 but no real way that explains how to lock the bootloader again. I just did and will these sets of instructions. I was nervous about doing it since I read a lot about how some people had issues. I did it this way and had no issue. Also, my thoughts were confirmed ahead of time by a pots I found by nightfox7. So here it is laid out.


This is assuming your on a custom rom and/or rooted.

1. download latest oxygenos full rom (full stock rom)
2. flash via TWRP (this shoud replace TWRP with stock recovery)
3. If stock recovery is not replaced be sure to flash it from the bootloader
4. Go ahead and load the full stock rom again vis adb sideload in the stock recovery
4. boot your phone and be sure that your phone is set to usb debugging.
5. boot into bootloader and lock bootloader via the following command
fastboot oem lock


It worked for me.

Thanks, it may be usefull. But are you sure you have to be on stock rom ?

 

[2x4]

Thanks, it may be usefull. But are you sure you have to be on stock rom ?

You can relock without being on stock ROM, but this will brick your phone

 

[Lowxorx]

You can relock without being on stock ROM, but this will brick your phone

Okay thanks for your answer [emoji6]

Envoyé de mon ONEPLUS A3003 en utilisant Tapatalk

 

[xAD3r1ty]

I'm in the process of returning my op3, I'm on 3.2.6 I think i have stock recovery because my twrp got overridden by a stock one that asks to choose language and has those bubbles as a background, that's stock right?

And will locking bootloader wipe internal storage?
After relocking we go to settings and untick OEM unlock?

 

[Lowxorx]

I'm in the process of returning my op3, I'm on 3.2.6 I think i have stock recovery because my twrp got overridden by a stock one that asks to choose language and has those bubbles as a background, that's stock right?

And will locking bootloader wipe internal storage?
After relocking we go to settings and untick OEM unlock?

I think it's stock recovery.

Locking bootloader will erase userdata.

I don't know if you have to uncheck the option after locking your bootloader.

Envoyé de mon ONEPLUS A3003 en utilisant Tapatalk

 

[rohan164]

@GCbard

hello, how to lock the bootloader on cutom rom, i don't want to be on Stock OOS 9.0.6.
i have flashed HAVOC Q/LOS Q & i want to lock bootloader, how to do that? please support.

 

[TNSMANI]

@GCbard

hello, how to lock the bootloader on cutom rom, i don't want to be on Stock OOS 9.0.6.
i have flashed HAVOC Q/LOS Q & i want to lock bootloader, how to do that? please support.

It is not a good practice to lock the bootloader while on a custom ROM. If you face any issues in future, the first requirement to sort out those issues would be an unlocked bootloader. You will be stuck with a locked bootloader.

The forums are full of threads/posts of people on custom ROMs asking how to unlock or bypass the unlocking.