simpleSIM does not provide an unlimited data eSIM for Tonga. All of its Tonga‑specific plans have a hard data cap, with the largest offering 20GB for 30 days. Other fixed data options include a 10GB plan for 30 days and a 5GB plan that also includes calls and texts.
Choosing a fixed data plan can be more cost‑effective for most travelers, unless the user is an extremely heavy data consumer who would benefit from a truly unlimited plan.