How to set one plus 9RT screen lock password?

You can set the pattern password, 4-digit password, 4- 16-digit password, 4- 16-digit alphanumeric password and pattern password as the screen lock password. Without unlocking the face, after waking up the phone, you can unlock it by swiping the password on the screen.

Settings path: Settings > Passwords and Security > Screen Lock Password.

If you forget the digital password when unlocking your mobile phone, you can contact the official after-sales service center for help.