This guide provides instruction for installing a sim card for the Sony Ericsson TM506 cell phone.
Firmly hold the phone between your fingers with your thumb on the battery cover.
Push down with your thumb until the battery cover comes off.
Unscrew the bottom two 5.4mm screws with a Torx T6 screwdriver.
Remove the two rubber casings for the top two screws with a plastic opening tool.
Unscrew these two 5.4mm screws with a Torx T6 screwdriver.
There are eight snap hooks located around the outer case. Carefully snap these to remove the outer case.
The Sim card can simply be pulled out through the opening.