Forgot unlock code
If you forgot your PIN, pattern, or password for unlocking your screen, you need to erase your phone, set it
up again, and set a new screen lock.
1. Make sure you know your Gmail address and password, which you'll need when setting up the phone. If
you've forgotten them, use Google's website to retrieve them.
2. Perform an external reset of your phone.
Fix issues : Account and sign-in issues 301