I had/have the same problem. But my solution may not possibly be yours. My problem was an extra charger I took from my sister (ok, maybe stole, since I visited from out of state) the charger head itself was the dysfunction. Looking closely, one of my prongs was scruffed up noticeably. So you may want to check and clean yours. Sometimes plugging on one side, I could hear the charging sound over and over. So I plugged it in reversed and seemed to work fine. But I'm not going to risk waking up to an almost dead phone that is also my alarm! So I had my original charger that works just fine. You may want to clean your port from time to time to get debris from being in your pocket or just from sitting out all day. I now have a habit of blowing the port every other time I pull my phone out of my pocket or even before I go to plug the charger in. Good luck!