MyTravel eSIM does not provide an unlimited data eSIM for Brunei. The available options are fixed data plans that must be used within a set validity period. For example, MyTravel eSIM offers a 10GB plan valid for 30 days, a 5GB plan also valid for 30 days, a 3GB plan for 30 days, a 3GB plan for 15 days, and a Global139 5GB plan valid for 30 days that includes coverage in Brunei and 126 additional countries. Choosing a fixed data plan can be more cost‑effective for most travelers unless they are extremely heavy data users who would benefit from an unlimited plan.