The edge lighting for for the email, sms and many other notification. The edge light will blink for not more than 5 minutes. Also we can add the edge lighting as an indicator too for example- if power goes below 10% the red edge light will indicate us. If the charge is full then the green and blue edge will blink until the power cord is disconnected.
good question. the red light will blink each 10 minutes for 30 seconds. And if power goes below 10% then it will blink after each 15 minutes for 20 seconds. The main purpose is to show that phone is in lower power and it must be get recharged.
