Step 13
Peel up the orange tape securing the white antenna cable to the side of the iPhone.
Step 14
Use a spudger to disconnect the two antenna cables from the communications board. Apple used a small dab of glue on these connections, which may make removing the antenna connections harder.
Step 15
Remove the following 3 screws:
One Phillips #00 screw securing the logic board to the iPhone near the camera.
Two Phillips #00 screws, one on either corner of the logic board.