BNESIM does not provide an unlimited‑data eSIM for Mongolia. All plans listed by BNESIM for this country have a hard data cap, with the largest options offering 100 GB under a fixed‑validity scheme.
Users who need a large amount of data can choose fixed‑data plans such as Surf 100 GB in Mongolia for 30 days or the Surf 100 GB in Mongolia plan with no expiry. These provide a sizeable allowance for a set period or a long validity window, which can be more cost‑effective than continuously topping up credit unless a traveller is an extremely heavy data user.