The fingerprint lock will let you unlock the display of an Android device by swiping your finger over the fingerprint sensor. The fingerprint lock will also let you bypass the password or PIN number if you have set it as default option to lock and unlock the device display. Yet it is seen that some users tend to forget the password, and due to that, they may get stuck on the lock screen of Android tablets.
If you have just locked your device and have turned on cellular data or access internet via Wi-Fi, then you can reset the PIN or password remotely via the app version of Android Device Manager. You can reset the PIN if you enabled the options for remotely locating the Android device and allowing remote lock and erase in Google Settings > Security. The PIN would be linked to your Google accounts, so cellular data or Wi-Fi connection is needed to remotely reset the lock screen PIN.
Launch Android Device Manager by entering “Android Device Manager” in your browser’s search box on another Android device. The screen of Android Device Manager includes a map and the list of Android devices linked to your Google account. If your locked device is on the top of the list, then you can easily log in. Else, enter the name of the device on the screen to explore the Android devices linked to your Google account. Ensure that you log in to the Google account associated with the locked device while logging into Android Device Manager.
Then, you can see three options in Android Device Manager – Ring, Lock, and Erase. The option Ring is to locate the Android tablet in case they get misplaced or lost, Erase is to factory reset the device, and Lock will let you reset the lock screen PIN or password. Tap on Lock option and enter a new PIN to allow Android Device Manager to send the PIN entered to the lock screen of the Android device you are stuck in.
Sometimes, the process may take a few minutes, so wait until you get the new PIN from Android Device Manager as a message. Once you get the message, enter the new PIN to unlock the lock screen of your Android tablet. Note that the unlocking process will work only if you have not disabled Location Services for the Android device via Google settings.