I just bought one from the microsoft store and it says that it should connect to att and tmobiles network. I stick my att sim from my 920 into the 8x and all i can get do is make calls and recieve texts. No data though. I've gone into the settings and into "cellular" and tinkered with it to no avail. I've also tried turn it off/on and a hard reset and no change. this is making me sad. Can anyone help? thanks