My 8GB iPhone 3gs' lock screen is unresponsive.
My iPhone 3GS' lock screen does not respond to touch. One day, 2 weeks or so after i got my phone, I went to use it to go on facebook. I had synced an album two nights earlier. The slider did not respond to my touch. I tried to turn it off, i held the lock button the power slider came up i tried sliding it, as i thought it didn't respond. I held the lock and home button to reset the device. I then turned it back on still nothing responded. I restored it to default settings and still this problem occured.I then restored it to a previous backup. I reset the device and left it off, i then turn it on a few hours later and the phone functioned as if nothing happened, i then locked it and it began all over again. I reset the settings manually from the phone from a suggestion. This has been going on like this for many months nothing has worked please help.
iPhone 3GS, iOS 4.3.2