Open Settings
. Select Phone > Phone management > Auto. keyguard.
Select from the following:
- Keypad autolock period — To automatically lock the keypad and prevent accidental keypresses when you do not use your device for a defined length of time, select User defined. Enter the time-out period. To use the keypad again, press the left selection key and * in quick succession.
- Keypad autolock period — To automatically lock the touch screen and prevent accidental taps when you do not use your device for a defined length of time, select User defined. Enter the time-out period. To use the keypad again, use the lock switch.
The settings available for editing may vary.
To save your settings, select Back.