I live in Rock Hill and work in Columbia. Exactly where my place is there is barely any 1x / 3G indoors. It's completely unusable even for phone calls. Throughout Rock Hill I get nice LTE Plus speeds. Columbia, however, is another story. Stuck in regular 6-8 mbps LTE down there.
I was on T-Mobile and kind of regret switching, but I got 2 new iPhones and cut my bill by $50 so I'll roll with the punches.
Also global roaming is only 64kbps and T-Mobile's 128kbps was at least usable. We only have 1 Sprint store in Rock Hill and that should tell you a lot.
Sent from my iPhone using Tapatalk