Is it possible to flash a bootloader? - Lenovo P2 Questions & Answers

Since the bootloader itself is a piece of software. Is it possible to flash an already unlocked bootloader on a locked phone to unlock it?

Is it possible to unlock bootloader with existing Lenovo id which I use earlier to unlock my other Lenovo P2 bootloader?

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Unlocking bootloader without tool

Is there anyway to unlock the Canadian ZL, which isn't unlockable by the tool?

How to root ZUK Z2 without unlocking bootloader?

Is their a way to root ZUK Z2 without unlocking the bootloader first? I don't want to unlock bootloader as it will void the warranty. I figured, phone can be unrooted easily too if can be rooted without unlocking bootloader and helps save the warranty.
You have to unlock bootloader first in order to gain root access.You can relock bootloader and regain warranty after flashing ZUI 1.9.004.But don't relock bootloader on custom roms as it can result in brick.

unlock bootloader with existing id

Is it possible to unlock bootloader with existing Lenovo id which I use earlier to unlock my other Lenovo P2 bootloader?
tried but not working
Lenovo brealy bad support

Unroot and Re-lock Bootloader

I am planning to sell off my Motorola G5S.
At present, the bootloader is unlocked and the phone is rooted.
Can someone tell me how to unroot the phone and lock the bootloader?
Additional Information: I used the following thread to unlock bootloader and root my phone.
https://forum.xda-developers.com/moto-g5s/how-to/guide-unlock-bootloader-moto-g5s-t3691200
Thanks in advance.

Install custom ROM or root with out unlock bootloader

Hi my Sony Xperia xa2 say bootloader unlock no is there anyway to force software or at least root with out unlock bootloader thanks
This is not possible. In order to flash anything to the device, the bootloader must be unlocked. The whole point of the bootloader lock is to prevent flashing anything; firmware is updated via OTA.

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