Hi all SIFUs here, I 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?

Nope, battery >15% when this happens, my phone's LED just keeps blinking at purple/pinkish color when screen is locked, without any notifications.

How to backup all and how to restore after factory reset? Can teach me step by step, noob for android phone here... Thanks!