It operates digital wireless, wireline, and both terrestrial and submarine fiber optic networks, serving markets that are geographically separated and technically challenging, such as the plains, deserts, and mountainous areas of the United States.

[citation needed] ATN's expertise is operating in underserved or niche markets, growing its business organically and through acquisitions by providing an alternative to national carriers.

[10] ATN operates wireless service in the United States as both a wholesale and a regional cellular provider via its subsidiary companies of Commnet Wireless, LLC (US)(Wholesale) in the western United States and Viya in the US Virgin Islands.

ATN previously owned Islandcom Wireless in Turks & Caicos (now defunct and had its former customers transferred to the Liberty Latin America-owned LIME/FLOW).

Under terms of the agreement, AT&T will acquire wireless properties, including licenses, network assets, retail stores and approximately 585,000 subscribers.