This is a really important point for anyone exploring Borneo! Your specific SouthESIM plan is designed to work only within Brunei. So, if you're planning to drive from Miri, Malaysia, into Brunei, your connection will stop right at the Sungai Tujoh border post. For a truly seamless adventure across both Brunei and the Malaysian states of Sabah and Sarawak, we highly recommend our regional Southeast Asia eSIM bundles. They’re perfect for exploring the whole island without a hitch!
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Is this SouthESIM for Brunei also valid for Malaysia (Sabah/Sarawak), or just Brunei?
Updated April 22, 2026
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