nextSIM does not provide a truly unlimited data eSIM for Southeast Asia. The plans that carry “Unlimited” in their names actually offer fixed high‑speed data allowances—such as 1 GB or 2 GB per day—and the speed is throttled to 512 kbps or 2 Mbps once that limit is reached.
Instead, nextSIM offers fixed‑data eSIM plans that cover Southeast Asian countries and provide large quantities of high‑speed data without throttling. Examples include the eSIM GLOBAL 50GB 30Days Premium, the eSIM GLOBAL 40GB 30Days Premium, and the eSIM GLOBAL 30GB 30Days Premium plans, which deliver 50 GB, 40 GB, and 30 GB of data respectively for 30 days. For travelers needing consistent high‑speed data, these fixed‑data options can be more cost‑effective than the capped “Unlimited” alternatives.