When unlocking the bootloader on a Chinese phone, the confirmation button does not work. Any guesses?

Question

Android

ps

сразу прошу прощения за многобукаф и за "полотно" из текста, просто не знаю, как подобное можно объяснить иначе =)

Good afternoon/evening/etc. In general, there is a Chinese phone Blackview BV6000, based on the MTK, it was bought 4 years ago. As much as I hated the so-called Chinese phones, this particular model is even quite suitable. But there is one "but" - stock firmware. More than once, many people have said that it contains adware out of the box, "partner" installers of unwanted software without the knowledge of the user, and I won't be surprised if some other hidden backdoor is found.

In fact, you can just install an alternative firmware and score. But it was not there. I don't know if it's a bug, or it was done on purpose to protect against people like me, but when I try to unlock the bootloader, the confirmation button just doesn't work. Easier: In the drain itself, there

is a "factory unlock" item, that is, in fact, the manufacturer does not limit the possibility of flashing. I activate it. I enter fastboot on the phone, connect it to the PC, register fastboot flashing unlockit, a warning appears on the smartphone, saying that you are losing the warranty, and it says below: if you agree to unlock the bootloader, press "volume up", if not - "volume down" . I press the "volume up" - zero reaction , as if the button was physically torn out, it does not work, and on the screen there is only information about the unlock itself, there are no errors or messages regarding its impossibility . Unlocking the same ( a la "volume down" ) works great.

Moreover, if the unlocking process actually went on after pressing, its status would appear in the terminal. Here, as I already said, as if the button was forcibly torn out - no reaction either on the phone or on the PC . Neither pressing it, nor pressing it together with other buttons, nor others (including additional buttons from this model), nothing works. I even tried all sorts of absurd ideas on how to start this process (by connecting the keyboard to the phone and hoping that it would perceive some button on it as "volume up") - nothing works.

It's true, as if it was specially conceived so that the user thinks that the phone is not locked, that he can do whatever he wants with it, although in reality this is not so.

It just won't let me unlock the bootloader and that's it.The button itself is fully working , if anything, it works everywhere except for the fucking fastboot.

Does anyone have any idea? Or maybe someone faced the same problem?

Answer 1

Looking for firmware.
Taken from it boot.img
Patched with magick Thrown
back to the computer.
The patched boot.img is sewn back into place.
Magisk is put into the phone, it finds its component - there is a root. (This is if you need it, of course)
As for the lack of button operation - I think I came across this ... It was the same - you press it, press it, no reaction ...
I needed a root, and in the end I got it differently way.