how to put a password to enter android recovery mode? I want to have high security so that no one formats my phone without a password even in recovery mode.


You can't protect your recovery with a password.
It's useless because if someone has physical access to your phone, he could just boot into download/bootloader/fastboot mode and flash a custom recovery to bypass any security on your phone.
This is also the reason why no recovery offers password protection.

  • There's no reason that the bootloader couldn't require a password, though. The problem is that I'm not aware of an Android bootloader which supports such a thing :/ – Matthew Read Mar 3 '15 at 22:26

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