Tried to search for LED problems/solutions but can't seems to find something similar. My S3 often has LED blinking even there is no event/notification, tried turn off everything for LED settings except the event/notification, LED will often be blinking even without event/notification, unless I totally turn off all settings for LED. Tried restart still not working. Want to ask if there is any solution before I try factory reset. By the way, for factory reset, how do we backup data/contact/whatapp/sms etc, and restore to phone after reset?