Samsung Galaxy S8 Disassembly & Assembly Manual page 20

Disassembly - Back Glass (7/8)
12) Disassemble the finger print sensor from the back-glass.
13) Remove the finger print sensor tape and all residues.
☞ Finger print sensor tapes CAN NOT be re-used.
※ Do not push the finger print sensor from the backside
to detach the finger print sensor.
- This document cannot be used without Samsung's Authorization -
Core process
for water resistance
Rev1.0
Confidential