Roamless does not provide a true unlimited high‑speed eSIM for Mongolia. The plans labeled “Mongolia Unlimited” give 3 GB per day at full speed; once that limit is reached the speed reduces to 1 Mbps, and the plan is still considered a capped bundle rather than unlimited data.
Travelers who need more data can choose from a 30‑day fixed plan of 50 GB at full speed or a pay‑as‑you‑go credit, such as the 100 GB credit that provides full speed in Mongolia and does not expire, allowing additional top‑ups if needed. These options give high‑speed data with clear limits or a flexible credit that can be replenished, but none of the Roamless offerings deliver truly unlimited data.