On a quick search it seem the only main carrier on this location is one company, but they likely have roaming agreements with other carriers. »www.lime.com/lc/personal/mobile/···paid.jsp
Boomer86 never say roadkill Premium join:2002-10-18 Walden, NY
reply to bukzin Digicel and Lime are the two dominant carriers on St. Lucia.
Unlimited data might be a stretch; check Truphone, they have free incoming SMS and better rates than any SIM you might find retail on the island. -- I turned on my computer for this?