Today when I woke up and tried to remove the usb cable from my 4S I realized that something happened overnight that caused it to burn the dock connector. My phone still works, although the bottom speaker now seems to work 50% of the time and the phone doesn't charge anymore. Also, the data connection is not working. My phone is currently jailbroken and I was wondering if there was any way of completely removing the jailbreak before taking it in for warranty. I was thinking of maybe using the "erase all data" function but I'm not sure if that will remove the jailbreak. Any thoughts would be greatly appreciuated, Thank you.