Why Android Phones Slow Down Over Time and How to Speed Them Up
 

Do Android phones and tablets slow down over time? Many people seem to think so. We’ll look at the reasons why devices slow down and how to battle slow downs.

This problem isn’t necessarily unique to Android — try using an iPad 3 with iOS 7 and feel how slow it’s become — but it does seem to be reported by many Android users.

http://www.howtogeek.com/183004/why-...speed-them-up/