Find "Phone autolock period"
Press the Menu key.
Press Settings.
Press Phone.
Press Phone management.
Press Security settings.
Press Phone and SIM card.
Press Phone autolock period.
Turn use of phone lock code on or off
To turn on the phone lock code:
Press User defined.
Press User defined.
Your phone will be locked after the set period and can only be used by keying in the phone lock code.
Key in the required number of minutes.
Press OK.
Press OK.
Your phone will be locked after the set period and can only be used by keying in the phone lock code.
To turn off the phone lock code:
Press None.
Press None.
Your phone will be locked after the set period and can only be used by keying in the phone lock code.
Key in the phone lock code and press OK.
Your phone will be locked after the set period and can only be used by keying in the phone lock code.
Exit
Press the Menu key to return to standby mode.