Just drive from Jacksonville to Atlanta and you will see there are several areas that still show no service for t-mo.
That is not acceptable to me.
...What route did you take? T-Mobile is 100% LTE along I-95/10/75 from Jacksonville to Atlanta which, AFAIK, is the standard, fastest route that most people take. Band 2 is 10x10 with minimum download speeds of around 20Mbps.