Some LG L86C users are complaining about flickering red borders/red rectangle on their Phone.
This happens too on other LG Smart phones running android ICS. Please notes that this is not a defect.
Follow below instruction to remove the flickering red borders:
1. From Your Home Screen
2. Press Menu → Settings → Developer options
3. Find ‘Strict mode enable’
4. Uncheck box of ‘Strict mode enable’
5. Reboot your device
6. Now your problems should be solved.
If the flickering red borders/red rectangle still happens, you need to enter into the device’ hidden menu to start a All Auto test to check if your device hardware has problems.
or refer to your local service center / repair store to fix it.