ShibaSIM does not provide a truly unlimited data eSIM plan for Brunei; all of its plans list a maximum data allowance that is combined with a daily high‑speed cap. After a plan’s daily high‑speed limit is reached, the speed is reduced to 128kbps. For example, the Multi‑region (incl. China) Unlimited (2GB/day high speed) for 5 days offers 2GB of high‑speed data per day, while the Multi‑region (incl. China) Unlimited (1GB/day high speed) for 3 days allows 1GB per day before throttling.
If a traveler is looking for a plan with a larger daily data allowance than the smaller capped options, these fixed‑data plans can be more cost‑effective. ShibaSIM’s plans are all available on 5G networks and allow tethering, but the daily limits mean they are not truly unlimited.