Samsung SM-G998B Repair Manual page 85

6
Remove transparent bottom release film underneath the black adhesive tape of
microphone hole tape.
Attach the new microphone hole tape by using the tape's "L Shaped" cutout to guide
you during the installation.
Gently press down on the edges of the adhesive tapes.
7
Remove the all of remaining release films on back cover.
Disassembly and Assembly
85