simpleSIM does not provide a truly unlimited high‑speed data eSIM for Mongolia.
The plans that carry the word “Unlimited” in their name grant 1 GB per day and then throttle the connection to 512 kbps, so the data is capped.
Travelers who need more data can choose from the fixed‑data options available for Mongolia, such as the 20 GB plan that is valid for 30 days and costs $33.62 USD, or the 10 GB plan that is valid for 30 days and costs $22.41 USD. These give larger data volumes during the entire validity period and may be more cost‑effective for heavy users.