Suddenly if you forget your android lock pattern, don’t worry, have a very simple method to unlock or reset the android lock pattern. Some peoples uses android lock pattern and many peoples often forget their lock pattern.
First of all, you need to switch off your android phone and keep it for some time 1-2 min.
After switching of your android device, press your up ↑ volume button and Press It down.
Now press the power button and hold it too along with the volume up button.
It will start a secret terminal interface (Recovery mode).
Then press to use home button for scroll volume up and down or swipe up and down.
Then you will get to the choose option Delete All User Data.
Now in this way, your android lock pattern is unlocked now problem is solved.
source- https://techviral.net/how-to-unlock-android-pattern-lock/