Apps refresh itself, feel like it's RAM is not enough to handle phone's usage. Facebook lag, whatsapp lag, Line Naver lag, notification centre lag, even when your phone is locked and you trying to swipe it to reply, when suddenly 2nd message pop up and u can feel the lag-ness when swiping your phone. And my 4s ringer is realizable lower volume than iphone 4. Hard reset may have done week by week to solve all the issue, getting annoyed by this. All of this issue is it coz' by iOS 6.0.1 ? My iphone 4s is running iOS 6.0.1,are there any iphone 4s user out there encounter this problem too ? Please teach me how to fix it, or is it my phone problem?