eSIM.sm does not provide an unlimited data eSIM for French Guiana. The roster of plans available for that destination consists only of fixed‑data options. For example, a 10GB 30‑day plan is sold for $72.40 USD, and a 5GB 15‑day plan is available for $38.30 USD; both plans allow tethering and cover French Guiana as well as over 20 nearby countries.
Because unlimited plans are not offered, travelers who need a large amount of data may find a fixed‑data plan more economical unless they are extremely heavy consumers. Fixed‑data plans are structured so that users can select the right balance between data allowance and validity for their trip.