I am going to talk to my T-Mobile person about that 55+ plan.....
For many years Verizon had the best coverage map. I mean most all the nation was covered by V, some gaps, but nobody is 100%.... My reason for not going with V has to do with previous bad experiences with the companies that merged to form it (Cuss-Some-More Service you see) I'm told they are good for Personal Cells but. Well. why risk it. TOo many stories where I am actually involved.
However AT&T a couple years ago made a MAJOR improvement in their coverage map and last I checked T-mobile had an agreement with AT&T since back in the day T-Mobile, well it was Omnipoint then, had the only GSM network and AT&T changed to GSM as well (The Codec for the phones,.. Or how they talk to the tower)
Today the maps all look a lot alike.. So I'm sticking with T.