Excellent explantion article from lifehacker blog:
http://m.lifehacker.com/5650894/and...ed-what-they-do-and-why-you-shouldnt-use-them
Sent from my GT-I9300 using Android Central Forums
http://m.lifehacker.com/5650894/and...ed-what-they-do-and-why-you-shouldnt-use-them
Sent from my GT-I9300 using Android Central Forums