First, remove the frame
Fold a small strip of cardstock three times over, leaving a tail
Slide it in, tail-first between U101 and the screen assembly, being careful not to lift up the USB-C Side Board.
(If you lift up the USB-C Side Board, you might mess up the connection between the PCB and PCF, which may break the speaker/rumble, and will require a soldering iron to fix)
Reassemble the PinePhone