Airalo does not provide a truly unlimited high‑speed data eSIM for Brunei. The only “Unlimited” labelled plans sell 3 GB of high‑speed data per day; after that limit the speed is reduced to 1 Mbps.
Instead, Airalo offers fixed data plans such as a 20 GB plan valid for 365 days or a 10 GB plan with 7‑ to 30‑day validity. These options give a larger amount of high‑speed data over a longer period and can be more cost‑effective for most users.