My wife's iPhone4S quit charging. Now it will run all the way to dead, turn itself off, and connecting the charger will turn it back on but then it doesn't charge. I was going to order the charging port and replace it, but since the port is causing the phone to turn on after it dies, it seems like it could be a software issue (it is/was completely up to date). Not sure what I should do, I don't know much about troubleshooting things like this. Any help would be much appreciated! Thanks!