I have been facing the same problem. I bought this phone on 8th May and after charging I found myself facing this problem from the very first day. Couldn't contact the store or the service center because I had exams and thats how I got too late. I don't know about anywhere else, but in India, when I contacted the Samsung Service Center, they said they would have replaced the handset if I would have showed up with the problem within four days post purchase. I showed up a month later. So, they said, they will fix it. Although, after reading what you guys posted, I really don't know how. I feel like crying. Should have gone for HTC.