1. Unlock With Smart Lock
Smart Lock is an Android feature that lets you specify certain conditions that bypass your lock screen security. You'll find it under Settings > Security > Smart lock on most phones, or Settings > Lock Screen > Smart Lock Type on Samsung devices.
If you have an old Samsung phone running Android 4.4 KitKat or earlier, you may have set a backup PIN. After entering your password or pattern incorrectly, follow these steps:
Tap on the Backup PIN option if you can remember it.
Type in your PIN code, then tap Done.
You will be redirected to the Screen Unlock settings to reset the lock screen pattern.
Regards,
Will