Soovia eSIM does not sell an unlimited data plan for Tunisia. All of its available packages for the country have a hard data limit. The most generous fixed data options are, for example, a 20 GB plan that lasts 30 days and costs $28.84 USD, and a 10 GB plan that also lasts 30 days for $16.98 USD.
Because the data allowance is capped, a fixed data plan may be more economical unless a traveler expects to use a very large amount of data. In that case, a pay‑as‑you‑go plan could be considered, but it is not a fixed‑data plan and also does not provide unlimited data.