I had the same thing happen on my Mogul. Inside the usb connection on the phone is a little black plastic tab that keeps the contact points lined up correctly. Mine had a piece broken off of it (probably from jamming my stylus in while trying to reset the phone in a dark car at 70+ mph and missing the reset button). Because it was damaged the contacts no longer lined up correctly and I had to wiggle the usb connector to get it to connect. I returned it and Sprint agreed that HTC used a piece of plastic that should not have broken. The rep got a new Mogul out of a box and replaced it in store...I was shocked but happy
