I bought it as a generic GSM phone after checking that several of the 4G bands were ones that AT&T used. I don't recall it being marketed as a "US" or "international" version like I had seen in the past. I had not considered a change in 4G band usage, but I would certainly respect that a whole lot more than the arbitrary troll toll it very much looks like, and it would be nice if they explained that if that was indeed the case.