Could also try cleaning it out. Not knowing how you carry your phone around. I have the holster case combo from VZW for mine, and carry it with me almost everywhere. With the port facing up like that all the time, it's a great little place to collect all kinds of lint, dirt, what have you. I pull all the cotton off a q-tip, which leaves just the smallest amount left on there, fits almost perfectly into the port. Cotton that is left on, is great at grabbing the dirt and cleaning it out. May not be your problem, but may also be a very simple fix.