My iPhone 3Gs touch screen is not working
I'm using iPhone 3GS for the last 7 months. Two days ago suddenly when I opened my calculator icon, it was not working. I tried several times, but it freezed; nothing was happening. I tried with restoring, but still it's not working.
I used it very carefully, so no accident had occurred with my iPhone. I don't know what happened.
Please someone help me.