This method will reset your Lg Leon to factory settings
How to reset:
- Power on your phone
- Go to Settings/General/Backup and Reset
- Select "Factory data reset"
- Select "Delete all"
- Select "Ok"
- Wait until format end and your phone will restarts
Use this option if you have software problems with your phone or if you want to delete your personal data
Warning! All your phone data (contacts, photos, videos, music, messages, aplications, games, files,) will be lost! Please make backup first if you can!
For more details you can watch here the video tutorial:https://www.youtube.com/watch?v=d_z-3MIQYT8