Have a new x750v2 with latest firmware. I am unable to establish a 4G connection with AT&T (in the US). It will only connect at 3G. Att support can’t help; they say the data plan is active and configured properly. They also told me the X750 is not compatible with their network.
Judging from recent reviews on Amazon, this is a serious problem with AT&T. Do you have a fix for this? I am still within the return window for this purchase, so I would appreciate a response quickly.