Hello all. I have a problem with my Galaxy A5. I am using an unlocked version of the phone (A500F) on the US network AT&T. The phone is updated to Lollipop. However, recently I am often losing data connection. For example, I would use facebook messenger and it would often say "no internet connection" for about 15 seconds and then come back. Similar things with snapchat, whatsapp, etc.. even though I have full signal and all the bars are full. What could be the problem?? Thanks!