Roambit does not provide an unlimited data eSIM plan for Tonga. The available options are fixed‑data plans that give a set amount of data for a specific period. For example, the Tonga 10GB 30‑day plan offers 10GB of high‑speed data, tethers down to 5 GB, and costs $64.99 USD; a 5GB 30‑day plan costs $34.99 USD, and a 3GB 30‑day plan costs $24.99 USD. These plans may be the best choice for travelers who need significant data but do not require unlimited usage, and they can be more cost‑effective than a pay‑as‑you‑go model for most moderate to heavy data consumers.