Forgot attern on screen lock on lg 76 - Samsung Blackjack SGH-I607 Smartphone

Solution 1: use your gooogle account
Solution 2: do a resset (all contacts and messeges will be lost)
Solution 3:
Connect your device via USB cable and enter those commands through ADB:
adb shell
rm /data/system/gesture.key
Reboot your android device and now supply following commands
adb shell
cd /data/data/com.android.providers.setting-s/databases
sqlite3 settings.db
update system set value=0 where name='lock_pattern_autolock';
update system set value=0 where name='lockscreen.lockedoutpermanently';
.quit
Restart your device and it It will accept any pattern lock.