https://unlocky.org/unlock-screen/how-to-bypass-lg-lock-screen-without-reset/

So if you’re asking if you can unlock LG password using emergency call, the answer is YES! Let’s proceed through the steps:

1. tap on the Emergency Call option on your device’s lock screen. Once the dialer shows up, enter like 10 asterisks (*) then double tap to highlight the characters and copy it. Now paste, and copy it and paste it again until the field is full and can no longer be highlighted.

Now go back to your lock screen and launch the Camera app. Access the drop-down notifications menu and then go to the Settings. Once here, you’re being asked to input a password. Paste here the string you have copied in the first step until the interface would be crashed. Now the Camera app will be opened and your LG will be unlocked.