Flysimio does not provide a truly unlimited high‑speed data eSIM for Brunei. The only plan that carries the label “Unlimited” is the Brunei Darussalam Unlimited, which offers a 2GB per‑day data allowance over a 7‑day period; once the 2GB per day is used, the speed is not specified to drop, but this plan is still a capped daily allocation rather than an unlimited data package.
Customers who need more data have a choice of fixed data plans. For example, the Brunei Darussalam 20GB 30Days plan gives 20GB of high‑speed data for 30 days, and the Brunei Darussalam 10GB 30Days plan gives 10GB for 30 days. Both plans include tethering and are delivered on 5G networks. Explained in this way a fixed data plan can be more cost‑effective than a daily capped routine, unless a traveler requires a very high total data volume.