LG OCS 2007 IP8540 - Manual (Page 30)

IP8540 User Guide
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3.6.1 Locking your phone
For security, IP8540 has a lock feature. When locked, the display shows the unlock screen shown below.
To lock the phone
•
Tap the Settings icon, .
•
Tap Lock Phone
IP8540 Unlock screen displays and the phone locks.
To unlock IP8540
•
Tap Unlock and follow the on-screen instructions.