Want to change the phone lock code for your mobile phone? It's easy, but you need to turn on the phone lock code before you can change the phone lock code.
Step 1 of 5
Find "Screen lock"
Slide two fingers down the display starting from the top edge of your mobile phone.
Tap Settings.
Step 2 of 5
Find "Screen lock"
Tap Security.
Step 3 of 5
Find "Screen lock"
Tap Screen lock.
Step 4 of 5
Change phone lock code
Key in your phone lock code
Tap the required phone lock code.
Follow the instructions on the display to change the phone lock code.