We got fine AT&T connectivity from Key West
to about the outer banks
area then regained connectivity through southern Virginia/Hampton and then have had bad service
in the southern Chesapeake.
I'm thinking of buying
a Verizon phone
BTW - there is an application on the iphone
(and I'm sure a similar one that other phone) called opensignal that records real world connection quality and builds a real world map of connection quality. If everyone driving up and down the ICW
installed this, it would really help everyone as a whole.