Honeywell Dolphin CT50 User Manual page 56

Chapter 4 — Use the Phone
48
7 Insert the SIM card in the door.
8 Close the SIM card door and slide it toward the bottom of the
computer to secure it.
9 Replace the battery, reconnect the handstrap, and press the Power
button to turn on the computer. The phone is now ready to use.
Dolphin CT50 and CT50h Mobile Computer User Guide