ZenSim does not provide a truly unlimited data eSIM for Mongolia. The only plan that contains “Unlimited” in its name, Mongolia Unlimited STANDARD – 5 Days, actually offers a data cap of 3 GB per day for a period of 5 days; after this limit the speed is reduced to 1000 kbps. Travelers looking for higher amounts of high‑speed data can choose from ZenSim’s fixed data plans, such as the 10 GB plan valid for 15 days, the 10 GB plan valid for 30 days, or the 5 GB plans valid for 5, 15, or 30 days. These fixed data plans provide a larger data allowance than the “Unlimited” branded option and can be more cost‑effective for most users.