St. George's: As the capital, St. George's and its surrounding areas, including the popular Grand Anse Beach tourist strip, have the most robust 4G/LTE coverage in Grenada. You'll find a strong signal around the Carenage harbour, the cruise terminal, and within most hotels and restaurants. Indoor coverage can sometimes be weaker inside older, thick-walled stone buildings or in the basements of larger resorts.

Grenville: Located on the east coast, Grenville is the island's second-largest town and has reliable mobile connectivity in its commercial center and market area. The signal is generally stable along the main coastal roads but may become less consistent as you venture into the more rural, hilly inland parishes surrounding the town.

Gouyave: The west coast fishing town of Gouyave, famous for its weekly "Fish Friday" event, offers good mobile service throughout the town center. The network performs well along the coast, but you might notice a slight drop in signal strength in densely packed residential areas away from the main road or when traveling east into the island's mountainous interior.

Sauteurs: Situated at the northern tip of the island, Sauteurs has dependable coverage within the main town area. Service is strong around historical sites and along the primary roads, though it can become less predictable on more remote beaches or hiking trails in the nearby hills, away from the populated center.

Hillsborough: As the main town on the sister island of Carriacou, Hillsborough has the best and most reliable mobile signal on the island. Connectivity is excellent around the jetty, main streets, and guest houses. However, once you travel to more secluded parts of Carriacou, such as remote bays or high-elevation points, you should anticipate weaker and less consistent service.

Main Coastal Roads: Coverage is generally reliable along the Western Main Road and Eastern Main Road, particularly around St. George's, Grand Anse, Grenville, and Gouyave. Expect some intermittent signal weakness in the more rural, sparsely populated stretches between these main towns.

Grand Etang Forest Reserve: The interior road that crosses through the mountainous Grand Etang National Park is a known area for significant signal loss. Due to the dense rainforest and terrain, mobile connectivity is often non-existent, making it essential to download maps beforehand.

Remote Coastal Areas: The far northern tip of the island in St. Patrick Parish and rugged sections of the south-eastern coast in St. David Parish can have less consistent coverage. While villages typically have a signal, the stretches between them can be unreliable.

Inter-Island Travel: On the ferry service between Grenada and the islands of Carriacou and Petite Martinique, mobile signal is typically lost mid-journey over open water. Coverage on Carriacou and Petite Martinique is present but generally less robust than on the main island of Grenada.