Port-au-Prince: As the capital, you will find generally reliable 4G LTE coverage across the main urban and commercial areas, including around the Toussaint Louverture International Airport. The signal is typically strong in central districts like Champ de Mars. However, indoor coverage can be noticeably weaker inside heavily-built concrete structures, and service can be intermittent during the city's frequent power outages.

Pétion-Ville: This major suburb of Port-au-Prince is a hub for business and tourism, featuring some of the most consistent 4G connectivity in the country. Signal is strong in the numerous hotels, restaurants, and shopping districts. Similar to the capital, performance can dip inside large buildings, and local power grid instability can temporarily affect tower performance.

Cap-Haïtien: Haiti's second-largest city offers good 4G coverage in its historic city center and along the main waterfront boulevard. Connectivity is generally dependable for travelers exploring the downtown area. When venturing to nearby landmarks like the Citadelle Laferrière, expect the signal to become less stable or switch to slower networks due to the mountainous terrain.

Jacmel: This southern coastal city, known for its arts scene, has solid 4G service in the main town, especially around its famous historic quarter and along the beachfront. Coverage can be less predictable inside the older, thick-walled colonial buildings. As you move away from the city center into the surrounding rural landscapes, the signal strength will likely decrease.

Les Cayes: In this key southern port city, expect decent 4G coverage in the central commercial areas and around the port. The network is prioritized for the city's core, but service can become less consistent in residential neighborhoods on the outskirts. When taking boat trips to nearby islands like Île-à-Vache, connectivity will be variable and is often weaker than on the mainland.

National Routes (RN): Coverage is primarily available in and around major cities like Port-au-Prince, Cap-Haïtien, and Les Cayes. Along the main highways like Route Nationale 1 (RN1) and Route Nationale 2 (RN2), expect the signal to be inconsistent, with frequent drops in rural and mountainous sections between towns.

Intercity Rail: Haiti does not have an active intercity passenger railway network. Therefore, connectivity concerns related to train travel are not applicable for the country.

Mountainous Regions: Driving through Haiti's significant mountain ranges, including the Massif de la Selle and the Massif de la Hotte, results in prolonged periods of no service. Major routes that cross these areas, such as the RN7 to Jérémie, are particularly affected by dead zones.

Remote Departments: Connectivity is extremely sparse in the more remote departments. Areas like Grand'Anse, the Nord-Ouest, and the Central Plateau have coverage concentrated in their capital towns, with vast rural areas and secondary roads lacking any reliable signal.