Very common with phones with the micro USB data port. The port is very fragile. In fact, right in your manual it will tell you not to use the phone while it's charging. Not that there's anything wrong with using the phone while it's charging but that using it while charging increases the possibility of damaging the data port. This type of damage is almost never covered under a manufacturers warranty either... You can still get stuff off and on the phone via the SD card and Bluetooth, however. You're lucky that it will still charge...