No, nextSIM does not offer a genuinely unlimited high‑speed data plan for Antigua and Barbuda. The plans that carry “Unlimited” in their names provide a fixed data allowance—either 1GB or 2GB per day—and after that limit is reached the speed is throttled to 512 kbps or 2000 kbps.
Travelers who need more data can choose from nextSIM’s fixed‑cap plans. For example, the 20GB 30Days Standard plan costs $91.84 USD, while the 30GB, 40GB, and 50GB thirty‑day Premium packages cost $779.78 USD, $1, 039.70 USD, and $1, 299.63 USD respectively. These plans offer large amounts of high‑speed data without a daily cap.