Chosen Solution
Can I replace my screen with an OEM screen from another phone without losing Touch ID or do I have to absolutely switch everything?
Main thing is to transfer the home button and disconnect the battery before removing any parts. There is still a slight chance of loosing touch id but its rare it happens.
No. Just need to switch the home button. That’s where Touch ID is stored. Sorta. You can use a crappy cheap super knock off display, if you want