You're not running the W8.1 preview by any chance? I know the wifi drops out every 20 min or so. Wouldn't be surprised if other things didn't work.
Nope I'm running 64bit Windows 7 Home edition
You're not running the W8.1 preview by any chance? I know the wifi drops out every 20 min or so. Wouldn't be surprised if other things didn't work.
Hi there! I am having exactly the same issue - iphone constantly get connected/disconnected like every second. I tried to switch off wi-fi and bluetooth as suggested above, it doesn't help. Even more, i tried the solution with self-powered USB hub, it also behaved the same as iphone - constantly connected/disconnected. I guess it is more than just USB power issue, might be motherboard must be replaced. 've been struggling with this for months already
Which version iPhone and ios do you have?
iPhone 4S, iOS 7.1.2
Are you plugging it into a laptop or pc? Usb 3 or 2? Try plugging it into the rear ports on your pc or a dedicated powered usb port if on a laptop.