All of the major providers wholly own a MVNO now. The only difference is that during times of congestion you are not first line. Other than that it is probably

All of the major providers wholly own a MVNO now. The only difference is that during times of congestion you are not first line. Other than that it is probably the same billing systems, policies, etc. Unless you need to be first priority on a congested tower, not much reason to actually be on Tmo,Verizon,ATT.