Port Vila: As the capital city on Efate, Port Vila has the most reliable 4G coverage in the country. You'll find a strong signal in the city center, along the waterfront, at Bauerfield International Airport (VLI), and in the main resort areas. Service can be slightly weaker inside larger concrete buildings, but it is generally consistent for all essential online activities.

Luganville: On the island of Espiritu Santo, Luganville offers good 4G connectivity within the town center itself. The signal is reliable for calls and data along the main road. Coverage becomes less predictable as you travel further out to popular dive sites or the island's famous blue holes, so it's best to plan for intermittent service outside the main urban zone.

Tanna Island: Mobile service on Tanna is primarily concentrated around the main town of Lenakel on the west coast. Here, you can expect a usable 3G or 4G signal for basic needs. However, connectivity becomes very weak or non-existent as you travel inland towards the Mount Yasur volcano and in more remote villages, so plan on being disconnected during major excursions.

Espiritu Santo (Rural Areas): Beyond Luganville, mobile coverage on Vanuatu's largest island is sparse. You may find pockets of signal along the East Coast Road leading to places like Champagne Beach, but service is generally unavailable in the island's interior, western coast, and more secluded spots. Download maps and information before you venture out.

Main Island Roads: On the main island of Efate, the Ring Road maintains reliable coverage around the capital, Port Vila, and the southern coast. However, signal becomes intermittent or is lost entirely on the more remote northern and western parts of the loop. Similarly, on Espiritu Santo, connectivity is strong along the East Coast Road near Luganville but degrades significantly as you travel north or head inland.

Inter-island Ferries and Sea Travel: Mobile signal is typically lost completely when travelling by sea between islands. Expect to be offline for the majority of any ferry journey, with service only returning as you get within a few kilometers of a major island's port like Port Vila or Luganville.

Mountainous Island Interiors: The rugged, volcanic interiors of larger islands such as Espiritu Santo, Malekula, and Pentecost are almost entirely without mobile coverage. Treks and inland tours to visit waterfalls or traditional villages will take you out of signal range for extended periods.

Tanna Island Roads: Connectivity on Tanna is concentrated around the main town of Lenakel on the west coast. The largely unpaved roads crossing the island to major sites like the Mt. Yasur volcano have very unreliable and mostly absent mobile signal. Do not expect a connection while exploring the eastern side of the island.

Outer Islands: Remote island groups, including the Banks Islands, Torres Islands, and Shepherd Islands, have extremely limited connectivity. When service is available, it is often restricted to the main village on an island and may be limited to slower 2G or 3G speeds, with no data service in many locations.