Nouméa: As the capital, Nouméa offers the most comprehensive 4G and growing 5G coverage. Signal is strong in the city center, along the popular Anse Vata and Baie des Citrons beaches, and in major commercial districts. While most hotels and shops have reliable indoor service, some older concrete buildings or lower-level floors may experience weaker signals. The local Karuïa bus routes within the city are consistently covered.

Koné: The administrative hub of the North Province has solid 4G coverage throughout its central areas. The signal is dependable for navigation and general use while in town and along the main RT1 highway. Coverage may become less consistent in the surrounding rural and tribal areas, particularly as you move inland towards the central mountain range.

Bourail: Expect reliable 4G connectivity within the town of Bourail and along the main RT1 highway corridor. Coverage is generally good at popular sites like Poé Beach and the main resort areas, but can become intermittent if you venture onto smaller rural roads or into more rugged coastal areas away from the town center.

Poindimié: This key town on the East Coast offers good 4G service within its central limits and around the main hotels. The coastal highway (RT3) in the immediate vicinity of Poindimié is generally well-covered, but the rugged topography of the region means you may experience temporary signal drops between towns and in more isolated coves or valleys.

Wé (Lifou): On Lifou Island, the best and most reliable mobile signal is concentrated in and around the main town of Wé. You'll find good 4G service here for essential communications. As you travel to more remote parts of the island, including secluded beaches and inland villages, expect coverage to become patchy, drop to 3G, or be unavailable entirely.

Route Territoriale 1 (RT1): The main highway linking Nouméa to Koné and Koumac on the west coast generally maintains good connectivity in and around towns. Expect signal to become patchy or drop entirely in the long, rural stretches between settlements, especially in the far north past Koumac.

Transversal Roads: Routes that cross the island's central mountain range, like the RT3 between La Foa and Canala, have very poor coverage. Signal is often lost completely when navigating mountain passes such as the Col d'Amieu, with service only returning closer to the coastal towns.

East Coast: The stretch of Grande Terre from Thio to Hienghène is known for inconsistent mobile service due to its rugged terrain and lower population density. While villages have coverage, the roads connecting them frequently pass through areas with no signal.

The Far South: The region around Yaté and the Plaine des Lacs is remote and has limited network infrastructure. Mobile signal is largely unavailable outside of the main village of Yaté, making it a significant dead zone for connectivity.

The Loyalty Islands: On the islands of Lifou, Maré, and Ouvéa, mobile coverage is concentrated in the main villages and administrative centers. Traveling between these points or exploring more remote coastal areas will likely result in a loss of signal.