GulfData does not offer a truly unlimited data eSIM for Mongolia.
The plans titled “Mongolia Unlimited – 1 day” and “Mongolia Unlimited – 5 days” have a data allowance of 1 GB per day and, after that limit is reached, the speed drops to 512 kbps. These are fixed data plans rather than unlimited bundles.
Travelers who need larger data volumes can choose GulfData’s fixed‑data plans; for example, the 20 GB plan has a 30‑day validity, the 10 GB plan also lasts 30 days, and the 5 GB plan provides 30 days of data at the same rate. These options are available if a higher data allowance is required.