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Basic phone functions
Locking your SIM card
You can protect your Xda Atom from
unauthorized use by assigning a PIN
(Personal Identification Number). Your first
PIN is assigned by Network Operator.
1. Tap Start > Phone or alternatively tap the
Phone button on the Today screen.
2. On the Phone Dialer screen, tap Menu
tab > Options > Phone tab.
3. Check the Require PIN when phone is
used option.
4. To change the PIN at any time, tap
Change PIN.