I just got the iPhone 4 for Christmas. As soon as I got it I tried to sync it with itunes. Itunes would freeze for about two minutes then a pop up would appear saying "cannot connect to iphone because received an invalid response from the device.
But when I go to my computer it shows up as a digital camera and using windows I can look at my pictures but that's all.
Connecting to itunes from the phone works it just won't connect to my computer at all. But it will charge.
I have tried everything that I found in the discussions and on the support page like: rebooting the iphone and the computer, redownloading itunes, checking the usb ports, I've tried everything and it still won't connect.