GulfData does not provide a truly unlimited data eSIM for Brunei. The plans that carry the “Unlimited” name actually give 1 GB per day at full speed and then reduce the speed to 512 kbps once that daily amount is reached, so the data is not unlimited.
Instead, GulfData offers fixed data plans for Brunei, such as 20 GB for 30 days, 10 GB for 30 days, or 5 GB for 30 days. These plans give a set amount of high‑speed data that must be used within the validity period. Choosing a fixed data plan can be more cost‑effective unless a traveler expects to consume data well beyond the available allowance.