There are models for detecting adult material, idk how well they’d work on CSAM though. Additionally, there exists a hash identification system for known images, idk if it’s available to the public, but I know apple has it.
Idk, but we gotta figure out something
Idk all the particulars, I just know my S7 is still not bootloader unlockable, and pretty sure previous galaxy phones weren’t either. That was my last Samsung. Not sure if this was a US thing, a T-Mobile/Sprint think (who I had back then), or a Samsung thing. But HTC and Pixel phones seemed to always be unlockable.