Iphone 3GS touch screen going CRAZY?!

looks to me like your being haunted!

seriously I have not seen this before but it is a software issue. when you restored your phone using your backup you put the corruption back on. try a clean restore and see it if still happens. dont restore from your backup. or just send it back to apple and they will replace it but they will have you restore it before you send it back to them.

 

I have seen this on a dropped phone. I changed the screen and LCD as both smashed and from then on, the phone did the same as you say. I could only put it down to logic board damage since I could not see, nor find any other fault.

 

This happened to my 3G - I let it fall and the screen shattered, sent it away to Apple and they replaced the screen but the home button was loose and at random intervals when I try to text someone, all I can do is hope that the gremlins press the correct buttons - hard restore fixes it for a while but I need to take it to the Apple Store as I can't be doing a hard restore every time I try to tap out an email or text

 

I've had the same thing happen with an iPod Touch. Certain areas of the screen wouldn't recognize a touch, apps randomly launched (it loved opening Facebook), phantom typing, sleep/wake responded randomly, etc. It was my fault, had it in a case, working in hot and humid whether. The entire back of the iPod was covered in moisture and while it didn't trigger any of the water sensors it certainly took its toll on the internals. So unless your friend can think of some external factor (drop/humidity) than I would suggest taking it to Apple.

 

Old post I know but my observation

I have this happen when I am plugge into a wall outlet to USB charter that I bought online for a couple dollars. I have bought about a dozen of these non-apple AC to USB chargers and list of them work but for some reason this one causes trouble. I tried multiple different wires with it but when plugged in the touch screen appears to have gone wacky. Unplugging from the charger makes the problem go away. Not sure if it something not wires right or too much power or what.