i-mate PM10A - Manual (Page 66)

Pocket PC Phone User Manual 66
Locking the SIM card
You can protect your Pocket PC Phone from unauthorized use by assigning a PIN (Personal
Identification Number). Your first PIN is assigned by your 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.