Nokia 5800
1. Go to Settings >> Phone>>Phone mgmt>>Security>>Phone and SIM card
2. Go to Lock Code (default lock code in any Nokia is 12345, click on lock code and change the code to whatever you want to)
3. Go to Phone autolock period (if this is set to 'None', your phone will not ask for a password while unlocking. Set this to 1 min)
4. Now leave the phone for 1 minute and see yourself that the phone will lock itself, now when you slide the unlock button, it will ask for the password.
Only disadvantage is , minimum lock period is 1 minute.
1. Go to Settings >> Phone>>Phone mgmt>>Security>>Phone and SIM card
2. Go to Lock Code (default lock code in any Nokia is 12345, click on lock code and change the code to whatever you want to)
3. Go to Phone autolock period (if this is set to 'None', your phone will not ask for a password while unlocking. Set this to 1 min)
4. Now leave the phone for 1 minute and see yourself that the phone will lock itself, now when you slide the unlock button, it will ask for the password.
Only disadvantage is , minimum lock period is 1 minute.