Peel the bottom of the graphite sheet toward the top of the phone until you can access the bottom bracket.

Use your hands, or tape with light adhesive, to keep the graphite sheet out of the way.

If you completely removed your graphite sheet, follow this guide to replace it.

If you don't have custom cut adhesive strips for the antenna, use double-sided tape, like Tesa Tape, to secure the graphite sheet to the logic board.