Guys I am having problem in my S2 data network. There are two problems: 1. When im at home i use WiFi and when I leave home I use Data Network. But the problem is that even though when I press the power button the right side, it says data network mode activated but I cant view any website or use Whatsapp or Viber or anything at all. And then randomly I get access to Internet and then randomly I am unaccessible. Note that all the time my phone says Data Network Mode Activated. 2. Often when I switch to Data Network Mode from WiFi, my phone goes into flight mode automatically. I do not do anything. It happens quite a lot and just by itself. At first I thought maybe it is a hardware problem but then I realised it only goes into flight mode when Data Network Mode is being used and not for WiFi. I have the proper APN settings by my service provider and Im using ICS. I havent rooted my phone ever. Do I need to format my phone? If so please tell me how. Or please provide solutions.