Libya has three main mobile operators: Libyana, Madar (Almadar Aljadid), and Libya Telecom and Technology (LTT). HelloRoam eSIM plans connect via partner networks where available.
Tripoli has 4G LTE coverage in the city center, the medina, and Mitiga International Airport. Benghazi in the east has 4G in the city center. Misrata, Zawiya, and the main coastal corridor along the Mediterranean have usable 4G coverage.
The Sahara Desert interior, Fezzan region in the south, and border areas have no mobile coverage. The oasis towns of Sabha and Ghat in the south have some 2G or 3G in the town centers. Cyrene, the ancient Greek ruins in the northeast, has limited coverage near the site entrance. Travelers venturing south of the main coastal cities require satellite communication for safety. Note that political conditions in Libya have been complex in recent years. Check government travel advisories from your home country before planning any trip.