Many who comment here will have a reason that they chose one carrier over one other carrier. They may have switched carriers. I always found that the latest carrier plan was better than the competition, and that it would go back and forth or be too confusing to come up with one clear answer. I actually have iPhones and aPhones on 5 carriers. I also travel the world quite a bit. Domestically, all the carriers are good for most unless you live in an area not covered by some. I remember times when Verizon was faster but now it seems that AT&T is faster for me, most of the time. I remember when you could buy international data from Verizon that covered 200 countries, while the AT&T list was only about 50 countries. That affected me in places like Russia and South Africa, back then. T-Mobile has incredible data plans for here and away but they don't seem as fast as claimed unless I'm in the store. Sprint has gone far out of their way to help me with issues, including a stolen phone number. Right now I believe that the best carrier I have, for my own needs, is Google Project Fi because the plan works in over 100 countries. You can even order a free data-only SIM for free, without even a shipping charge, to use it on iPads and the like. I would never say that anyone's choice of plan is bad in any way though.