Stellar eSim does not provide a genuinely unlimited high‑speed data eSIM for Brunei. The plans that carry “Unlimited” in their name give a fixed data cap of 3 GB and are valid for durations ranging from 1 day up to 300 days. Travelers who need more data can opt for larger fixed‑data plans such as 50 GB for 90 days, 30 GB for 60 days, or 20 GB for 20 or 30 days, which offer higher allowances but are not unlimited.