Sometimes we forgot what pattern we put on lock screen. The only way to get back into device is factory reset device.
But there are chances to lose important data while doing factory reset.
Now you don't need to worry about it. If your phone have custom recovery, you just need to flash the file.
- Use custom recovery like TWRP/CWM/Philz
- Put the zip file in sdcard
- Install Zip
Here is another zip by my friend @Alex025 to remove Lockscreen Pattern Lock