There are no truly unlimited data eSIM plans from nextSIM for Mongolia. Every plan listed has a fixed data allowance—1 GB, 2 GB, or larger amounts such as 10 GB, 20 GB, 30 GB, 40 GB, and 50 GB for 30‑day validity. Plans that carry the word “Unlimited” in the name still contain a capped data amount and specify a reduced speed that applies once the limit is reached, so they do not offer unlimited high‑speed data.
Travelers who need more data can choose from the fixed‑data plans. For example, the eSIM Mongolia 10GB 30Days Premium provides 10 GB of high‑speed 3G/4G data for 30 days and is specific to Mongolia, while the eSIM GLOBAL 50GB 30Days Premium offers 50 GB of high‑speed data for 30 days and covers Mongolia plus 157 other countries. These options give larger data allowances and, for heavy data users, can be more cost‑effective than the 1 GB or 2 GB “Unlimited” plans.