You can install custom roms to your phone.
Most device manufacturers put up roadblocks, and carriers will try to talk you out of it, but you can.
The first step is cracking the bootloader (which is a mobile version of the bios.)
This step is a usually one-way step, and leaves your device vulnerable. The exception are google pixles, which are designed to allow you to re-lock it. Which is why graphene is only available for pixels.
“Just liking what Putin does to him in private” is one method of recruitment.