I use the same device Unite device on ATT. A few differences I've seen on a half-dozen uses:
- only the outer balls have signal at Leinster Bay STJ
- Coral Bay and south shore STJ now have coverage with the addition of a new
- Coverage to Cooper is pretty good
- Coverage to Virgin Gorda, Spanishtown is weather dependent
- Diamond Cay/JVD is pretty good
- Cane Garden Bay/Tortola is pretty good

Basically, assuming line of sight, from Spanishtown to Diamond Cay.

Generally, my Digicel router does better than ATT east of the Bight and Great Harbor.

Cheers, Rick