It works fine wherever you have Internet. You do need the DTOPS sticker number.
For Coral Bay, the AT&T tower is behind a mountain in outer Coral Harbor. There is plenty of coverage in outer Coral Bay. Verizon does not have coverage and T-Mobile works through the BVI towers.
Welcome to Coral Bay. Check out our Coral Bay Cruising Guide at
https://www.cbycstj.org/coral-bay-cruising-guide. We are on Echoes in Coral Harbor.
Cheers, RickG