1. After 5 failed unlock attempts, tap Forgot pattern?.
    device 3224/1688861.jpg
  2. To unlock with the backup PIN, enter the PIN, then tap OK.
    device 3224/1688862.jpg
  3. To sign in with a Google account, enter your Google login information, then tap Sign in.
    Note: The device must have already been associated with a Google account for the 'Account unlock' option to display.
    device 3224/1688863.jpg
  4. From this screen, the screen lock method can be adjusted.
    device 3224/1688864.jpg