nextSIM does not provide a true unlimited data eSIM for Mexico. All of its Mexican plans have a fixed high‑speed data allowance; the “Unlimited” wording refers only to the fact that the high‑speed data cap is achieved after a certain amount and the speed thereafter drops to a reduced level (512 kbps or 2000 kbps). Because the amount of high‑speed data is capped, the plans are not unlimited in the usual sense.
If a traveler prefers a larger, predictable data budget, nextSIM offers fixed‑data plans, such as 100 GB for 30 days at $93.90 USD or 50 GB for 30 days at $53.27 USD. Other options include daily or multi‑day plans with 1 GB/day or 2 GB/day capacities. These fixed‑data plans can be more cost‑effective for most users unless extremely heavy data consumption is required.