Hi all.... Has any one ever experience a portion of the touchscreen not reacting to touch? One of my friend's iPhone has this problem, but it only happens to the 2nd level GUI. When at the home screen, it works fine, but when he goes into mail,SMS or any other app, the lower potion of the touchscreen do not react to touch... About a 1/4 inch from the base of the touchscreen. Now he is unable to reply any SMS or enter "space" in a message or change the keyboard into the 'numbers and symbols' menu. Do you guys think that it is a hardware or software error? I tried restoring the phone a couple of time but the problem still remains... Has anyone experienced this and any solutions out there? Thanks in advance~!