Guys, hi I have a Samsung Galaxy S on Android 2.2. Lately I've been having this strange problem. About once in 5 days, touch buttons became illuminated themselves. When that happen, I couldn't unlock the phone nor bring on the power switch. After that, the phone turned itself off or sometimes I had to take out the battery. When it turned on again, all my settings were reset to default and couldn't receive calls anymore! This happened to me like 4 times within this month. I've tried resetting to factory default but with no avail. I don't know if it's a software or hardware problem or whether I should return it for repair (I'm still on warranty). Is this familiar to any of you? Can you please give me some suggestions what to do?