Changing your Lock Screen PIN or Password

From the Home screen, tap the Apps Key > Settings > Lock screen.

Tap Select screen lock.

Enter your current unlock sequence, then tap Next.

Tap PIN to change your number lock sequence or tap Password to change your alphanumeric lock sequence.

You’re prompted to enter and reenter your new lock sequence.

From then on, you will need to enter that sequence and tap OK to unlock the screen.