Baku: Strong 4G/LTE and emerging 5G coverage is available across the city center, including the Icherisheher (Old City) and the waterfront Baku Boulevard. The Baku Metro offers reliable connectivity on platforms and in most stations, though the signal can be intermittent while moving through deeper tunnels between stops. Indoor coverage in dense, Soviet-era apartment blocks or basements can sometimes be less consistent.

Ganja: Azerbaijan's second city has dependable 4G coverage throughout its main urban and commercial areas. You can expect a stable connection for maps and browsing in the city center. Performance may be slightly reduced inside buildings with very thick walls or on the immediate rural periphery.

Sheki: This historic mountain town has good 4G service in the main tourist areas, such as around the Palace of the Sheki Khans and the central market. Due to the mountainous terrain, the signal can become weaker or drop to 3G as you travel into the surrounding villages and valleys. Indoor coverage in traditional stone guesthouses can also be variable.

Gabala: As a popular resort hub, Gabala provides excellent 4G connectivity around its main hotels, the town center, and attractions like the Tufandag Mountain Resort. The network is strong in these developed zones, but be prepared for the signal to weaken significantly if you venture onto more remote hiking trails in the surrounding Caucasus Mountains.

Major Highways (M1, M2): Coverage is generally strong along the main M1 (Baku-Quba-Russia border) and M2 (Baku-Ganja-Georgia border) highways, especially near major cities. Expect intermittent signal drops in more sparsely populated sections between urban centers, particularly on the stretches through the semi-desert plains of central Azerbaijan.

Azerbaijan Railways (ADY): The key Baku-Ganja intercity line maintains reliable connectivity for most of the journey, as does the Baku-Sumgait commuter route. On lines extending to more remote areas, such as the routes towards the Georgian or Iranian borders, the signal can become less stable between stations.

Greater Caucasus Mountains: Mobile service is significantly reduced or completely absent when traveling in the mountainous northern regions around Quba, Qusar, and Sheki. Roads through high passes and deep valleys, especially the route to remote villages like Khinalig, will have long periods with no signal.

Karabakh and Surrounding Regions: As infrastructure is actively being rebuilt, cellular coverage is inconsistent. While service is improving in urban centers like Shusha, expect very spotty or non-existent signals in rural areas, on mountain roads, and in the Lachin district.

Talysh Mountains: The coastal M3 highway towards Lankaran and the Iranian border has good coverage, but the signal weakens considerably when traveling inland into the dense forests of Hirkan National Park and the Talysh Mountains.