Hey all, I recently purchased a Samsung Infuse on Amazon because my Captivate died after being a little over a year old and AT&T wouldn't help out. The Infuse since I bought it has never connected to the 4g network on its own and only the WiFi actually works. I have the 4g sim card in it and the Packet Data is checked off. I brought it to the AT&T store and they again were reluctant to help because I had to buy the phone from Amazon rather than shell out their kind of money. The guy at the store suggested a factory reset, I'll probably lose the unlock but it doesn't bother me because it is an AT&T phone anyways. I'll appreciate any help, thank you!