The glass is cracked; touch may still work, or a strip of the screen stops responding. If touch fails with no visible crack, the screen isn't the problem — the connector or touch IC is.
A drop. On iPhone, if touch fails without a crack, look past the screen.
Full screen assembly replacement. We transfer the Face ID flex from your old screen to the new one — skip that step and Face ID is gone for good.
It depends on the model and on what we find inside, so we quote each repair individually. The diagnosis fee depends on the device, and you approve the exact repair price before any repair starts. If it can't be fixed, you only pay the diagnosis.