Nokia Lumia 720 Service Manual page 15

25) Use the SRT-6 to release the top end of the RF COAX CABLE. Be very careful when opening the
connector! Be also careful not to damage any components nearby!
26) Unscrew the four Torx+ size 4 screws in the order shown. Remove the screws with tweezers to avoid
damaging the components on the ENGINE BOARD! Do not use these screws again. Discard them.