Unlock bootloader - Samsung Galaxy A51 Questions & Answers

Does anyone know how to unlock bootloader in SM-A515U without having to pay?

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[Q] unlock, relock. What it means?

HI. I tried to unlock my bootloader and i did and it goes from lock to unlock. And then i did smth that it goes from unlock to ''relock security warning''. What it means? what is the difference between unlock and relock? sry, i'm noob and i'm just trying to root my HTC evo 3d.
Apologies for my english and noobnes.
rooting htc phones needed to unlock the bootloader you juust relocked your bootloader. until bootloader is locked nothing can be written in /system partition and without write access no root access so again try to unlock the bootloader

Unlook bootloader then update or update then unlock bootloader? Or does it matter?

Just got my OnePlus One yesterday and I was gonna unlock the bootloader but there is a update out.
So my question is:
Do I update THEN unlock the bootloader?
Do I unlock the bootloader THEN update?
Does it matter?
Thank you
riahc3 said:
Do I update THEN unlock the bootloader?
Do I unlock the bootloader THEN update?
Does it matter?
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It doesn't matter - just unlock it before you install anything
Doesn't matter at all, as @spanna said. The bootloader can be unlocked no matter which build you're on.
Transmitted via Bacon

How to unlock bootloader?

How to unlock bootloader? I have samsung galaxy J500-H. Thanks.

[Help] Can i lock my bootloader?

Can I lock my bootloader again? Because I can't flash anythis, because FRP is locked, I think that is the problem why I can't flash no?And in the development settings enable oem unlock it's blocked and I can't switch the button...
Usually users report to do the rollback to MM and they get the phone locked and unrooted
Just like out of the box..
But in your case I would be more carefull since oem unlock can not be changed..
Let some more experiaced user tell you if you can do the rollback to MM evan with the
oem unlock not changed..
Use the adb command with the unlocking code you got
PalakMi said:
Use the adb command with the unlocking code you got
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What to do with adb and unlocking code, because bootloader is unlocked, but i can t do anything, and i cannot enable oem unlock
I have answered similar question here. Now you have to flash rollback and after that B131 (everything as stock). Then you have to update to version you want to unlock and follow my steps.
C0oL3r said:
What to do with adb and unlocking code, because bootloader is unlocked, but i can t do anything, and i cannot enable oem unlock
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Sorry, I thought I was answering someone else, there's lots of people talking about bootloader

Remove bootloader unlocked warning

Hi,
I would like to sell or exchange my mobile but i have unlocked my bootloader.. Is there anyway to remove the bootloader unlocked warning message..
Hello, so... relock your bootloader? xD
Lock the bootloader, search how to do it

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