Koror: As Palau's commercial hub and most populated area, Koror offers the nation's best and most consistent 4G LTE coverage. Signal is strong in the downtown area, hotels, and restaurants. Indoor coverage in larger concrete buildings can sometimes be weaker, but service is generally reliable for all standard mobile use.

Airai: This state, home to Palau's international airport, has dependable 4G coverage, particularly around the airport itself and along the main roads connecting to Koror. In the more populated centers of Airai, the connection is stable, but it may become less consistent in the state's more rural, inland regions.

Melekeok: The location of the nation's capital, Ngerulmud, on the large island of Babeldaob. Service is prioritized around the capitol complex and along the main Compact Road that circles the island. Venturing off this primary road into forested or remote coastal areas will likely result in a significantly weaker or lost signal.

Peleliu: A popular outer island for diving and historical tours, Peleliu has functional mobile service centered around the main village. While you can expect a signal for calls and basic data in populated areas, connectivity becomes very patchy to non-existent on remote parts of the island, including some WWII sites and offshore dive locations.

Rock Islands Southern Lagoon: A major tourist draw for boat tours and snorkeling, this UNESCO World Heritage site has extremely limited to no mobile connectivity. Once you leave the immediate vicinity of Koror by boat, expect to be completely offline. Plan accordingly by downloading maps and informing others of your itinerary beforehand.

Compact Road (Babeldaob Island): The main paved road circling Babeldaob generally maintains a stable mobile signal, especially near coastal villages and the capital, Ngerulmud. However, you may experience brief signal drops in more isolated, forested sections between the island's states.

Koror-Babeldaob Bridge: Connectivity is strong and consistent across the K-B Bridge, the primary link between Palau's commercial center in Koror and the main island of Babeldaob, ensuring uninterrupted service as you travel to or from the international airport.

Babeldaob's Interior: Venturing off the main Compact Road into the island's hilly, jungle-covered interior will likely result in significant signal degradation or complete loss of service. Coverage is concentrated along the coast and the primary road network.

Rock Islands Southern Lagoon: As a UNESCO World Heritage site composed of hundreds of uninhabited limestone islands, mobile coverage is extremely limited to non-existent. Do not expect a reliable signal for calls or data while boating, diving, or kayaking through this iconic region.

Southern Islands (Peleliu & Angaur): While basic connectivity may be available within the main settlements on Peleliu and Angaur, the signal is often weaker than in Koror. Traveling to historical sites or remote beaches on these islands frequently leads to a complete loss of mobile service.