QTek s100 User Manual page 66

66 Pocket PC Phone User Manual
Locking the SIM card
You can protect your Pocket PC Phone from unauthorized use by assigning a PIN (Per-
sonal Identification Number). Your first PIN is assigned by operator.
1. On the Pocket PC Phone keypad, tap Tools > Options > Phone tab.
2. Select Require PIN when phone is used.
3. To change the PIN at any time, tap Change PIN.