We get very good coverage with Verizon throughout the USVI. No $10 international roaming fee except when your phone sniffs the BVI cell towers from the northeast shore of St John. We try to remember to turn off mobile data when we're sailing between Whistling Cay and Ram Head.

The signal can be sketchy at times in Little Lameshur Bay on the south shore of STJ. Sailing between STJ and St Croix we get a usable signal for all but the middle 8~10 miles of the 32 nm passage.