eSIM ProZone services rely on land-based cellular towers and will not function when a cruise ship is navigating in open waters, out of range of terrestrial networks. However, your eSIM ProZone plan will automatically activate and provide full connectivity as soon as the ship docks at any port of call, such as Nassau or Grand Turk, allowing you to access high-speed data while exploring ashore.
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Does eSIM ProZone function on cruise ships while at sea?
Updated April 22, 2026
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