The phone lock code prevents others from accessing the contents of your mobile phone (pictures, messages etc.). When the phone lock code is turned on, it needs to be used every time you turn on your mobile phone and when it has been in sleep mode.
Step 1 of 7
Find "Passcode"
Tap Settings.
Step 2 of 7
Find "Passcode"
Tap Passcode.
Step 3 of 7
Turn on use of phone lock code
Tap Turn Passcode On and key in a phone lock code of your own choice twice.
Step 4 of 7
Turn deletion of data on or off
Tap the indicator next to "Erase Data" to turn on the function.
Step 5 of 7
Turn deletion of data on or off
Tap Enable.
Step 6 of 7
Turn off use of phone lock code
Tap Turn Passcode Off and key in the phone lock code.