To set the keypad autolock period, select Menu > Tools (or Settings) > Settings > General > Security  > Phone and SIM card > Keypad autolock period.To set the device autolock period, select Menu > Tools ( or Settings) > Settings > General > Security  > Phone and SIM card > Phone autolock period. Enter the lock code when is requested. The default lock code is 12345.

Note: When the device is locked, you can still answer incoming calls, and calls may still be possible to the official emergency number programmed into your device.Tip: To lock either the keypad or the device manually, press the power key briefly, and select either Lock keypad or Lock phone.