When you're island-hopping with SouthESIM, you'll generally have a strong signal while docked or close to the coast, such as departing from Phuket, Thailand, or arriving at Lombok, Indonesia. However, as your ferry ventures further into open waters, especially between islands, the signal might become intermittent or drop briefly. It's common for connections to be less stable in the middle of a sea crossing, so plan your essential online tasks accordingly.
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Will my SouthESIM work on ferries between islands in Southeast Asia?
Updated April 22, 2026
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