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AT&T connects consumers and businesses through its own wireless and fiber networks. Its main business is U.S. mobile service: subscribers pay for voice and data plans, with wireless service supplying most of the company’s revenue. It also sells phones, often on installments, and offers prepaid service through Cricket and AT&T PREPAID.
Households also pay AT&T for fiber broadband or AT&T Internet Air, which delivers home internet over its wireless network. Businesses and government customers buy internet access, data connections and managed network services. AT&T still earns revenue from older copper-based voice and data services, but demand is declining as it shifts toward fiber and wireless connectivity. A much smaller operation sells mobile service and devices in Mexico under AT&T and Unefon.
The business depends on continued spending to maintain and expand network capacity, access to licensed radio spectrum, and retaining subscribers. No single customer supplies a large share of revenue. Government licenses and telecom regulation govern its services, and shutting down copper-based services requires regulatory approval where applicable.
The risk section is the longest, dullest part of the filing. This keeps only what can really hurt you: where it hits, how hard, when it plays out.
Every company claims an edge. Each one is checked against hard numbers like margins and returns: which hold, and which line gives way first.
Verizon competes directly with AT&T for U.S. customers paying for mobile service, home broadband and enterprise connectivity. Watch its wireless customer trends and fiber and fixed wireless broadband results for signs of competitive pressure on AT&T.
T-Mobile US competes with AT&T nationwide for mobile customers and increasingly for households buying broadband delivered over 5G wireless networks. Watch its postpaid customer retention and 5G home broadband performance: both sit directly in AT&T's path to service growth.
Charter competes for AT&T's U.S. household connectivity spending by bundling Spectrum broadband and mobile service against AT&T's fiber, fixed wireless and mobile offerings. Its success selling more services per customer and retaining those customers shows how strongly that bundle is competing with AT&T's combined mobile and broadband plans.
Comcast competes with AT&T's fiber and fixed wireless broadband for household customers, adding mobile service bundles to capture more of their connectivity spending. Watch its U.S. residential broadband and wireless results rather than its media or theme parks for the clearest read on this rivalry.
AT&T pays Crown Castle to place network equipment on its towers, so AT&T's network expansion and upgrades can lift Crown Castle's rental revenue. Watch rent increases from equipment additions on existing towers as a concrete sign of carrier investment in coverage and capacity.
AT&T rents communications-site space from American Tower in the United States and Latin America to support wireless coverage and capacity. American Tower's long-term leases and periodic rent increases make it an ongoing infrastructure cost for AT&T, not a rival for mobile subscribers.
Dycom depends heavily on AT&T's network construction and maintenance work: AT&T supplied approximately 25.4% of its fiscal 2026 contract revenue. Watch revenue from AT&T contracts for a direct read on the work supporting AT&T's network expansion.
Ericsson supplies major equipment for AT&T's multiyear deployment of the radio equipment that connects phones to its network, using an open radio access network design. That ties Ericsson's U.S. equipment business to AT&T's wireless investment; watch deployment news for progress on that spending.
Lumen competes with AT&T for business customers buying network connections, but also sold AT&T its residential fiber business in 11 states in February 2026. Its enterprise networking results remain the competitive signal; that residential fiber business now belongs to AT&T.
AT&T buys equipment that carries traffic over fiber and directs it across networks, plus software and services, from Ciena; it accounted for 10.5% of Ciena's fiscal 2025 revenue. Watch Ciena's revenue from AT&T for a specific measure of AT&T's purchases, rather than treating all of Ciena's growth as an AT&T signal.
EchoStar pays AT&T for network service used by its Boost and Gen Mobile customers while competing with AT&T for retail mobile subscribers. It completed the transfer of all customer traffic from its own 5G network to AT&T by November 15, 2025, making those brands both wholesale demand for AT&T and retail rivals.
América Móvil's Telcel competes with AT&T for consumers and businesses paying for mobile service in Mexico, but this rivalry affects only a small part of AT&T's results. AT&T's Latin America segment contributed approximately 3% of total segment operating revenue and less than 1% of segment operating income in 2025.
SpaceX's Starlink sells satellite broadband to consumers, enterprises and governments, competing with AT&T especially where ground-based network coverage is limited. Watch Starlink's broadband coverage, capacity and pricing for signs of how strongly it can compete for those customers.
AT&T Inc. earningsThis company
Wireless service is AT&T's largest revenue stream, and this report will show whether growth in service revenue is still turning into Mobility profit.
Read Mobility service revenue alongside its operating margin: service revenue reflects what customers pay for wireless service, while the margin shows how much remains after operating costs. If service revenue keeps growing and the margin holds or rises, customer payments are still translating into profit; if service growth slows or the margin falls, service growth is weakening or costs and device promotions are squeezing profit.
Crown Castle Inc. earningsCCI
Crown Castle's report will show whether carriers are adding equipment to existing towers, a signal of the capacity demand and rental costs tied to AT&T's network expansion.
Look at whether equipment additions on existing towers are driving rent growth. If both rise, carriers are expanding network capacity, which may support AT&T's buildout but can also add rental costs; if additions and rent growth are weak, the tower-demand signal is softer, though it does not establish a change in AT&T's own spending.
Comcast Corp earningsCMCSA
Comcast's U.S. residential broadband and wireless results will show how strongly its bundle competes with AT&T for household connectivity spending.
Read Comcast's residential broadband customer trends alongside its wireless results. Broadband gains with a strong wireless business would suggest its bundle is attracting or keeping more households, intensifying competition for AT&T's fiber, fixed wireless and mobile services; weakness in both would suggest less traction for Comcast's offer, not automatic gains for AT&T.
Verizon Communications earningsVZ
Verizon's wireless customer trends and broadband results will show whether it is holding or gaining ground in U.S. markets it shares with AT&T.
Look at Verizon's wireless customer retention and additions alongside its fiber and fixed-wireless broadband results. Strong retention and broadband growth would show it is keeping and attracting customers AT&T also seeks, sharpening competitive pressure; customer losses or weak broadband growth would soften that signal, but would not prove AT&T is winning those customers.
