Is a WorldESIM plan for Brunei also valid in Malaysian territories like Sabah and Sarawak?

A WorldESIM plan purchased for Brunei is exclusively valid within the Sultanate. This is particularly important for travelers exploring Borneo. If your journey involves crossing from Brunei into Malaysian Borneo, for example, driving from Bandar Seri Begawan to Miri (Malaysia), your Brunei-specific connection will cease at the border posts like Sungai Tujoh. For a seamless multi-country experience across Borneo, WorldESIM offers a comprehensive Southeast Asia Regional eSIM or a custom bundle that includes both Brunei and Malaysia, ensuring continuous connectivity throughout your adventure.