If you would like to change the SIM pin code, start from the next step. If you would like to set up a lock screen on your phone, jump to step ""11"". Make sure you have your Public SIM PIN before you start the guide. NOTICE: SCREEN IMAGES MAY DIFFER FROM YOUR ACTUAL DEVICE.
If you cannot find ""All"", continue to the next step.
""Old SIM PIN""
""New SIM PIN""
Confirm ""new SIM PIN""
Your phone is now secure with a screen lock.