AT&T is one of the largest telecommunications companies in the United States. It makes money in three main ways: charging monthly fees for wireless phone service, charging monthly fees for home internet, and selling phones and equipment. The wireless business is the biggest piece, generating 54% of total revenue in 2025. Most customers pay a fixed monthly bill every single month, whether the economy is strong or weak. That makes AT&T's income fairly predictable. On top of wireless, AT&T is rapidly expanding its AT&T Fiber internet service, which now reaches 10.4 million home customers. The diagram below traces where the money goes.

Five years of financial data tell a story of a company that shrank, stabilized, and then began growing again. Revenue fell from $134.0 billion in 2021 to $120.7 billion in 2022. That drop was not a sign of a failing business. It was the result of AT&T selling off its entertainment assets, most importantly DIRECTV, which it separated into a joint venture in 2021 and fully sold to partner TPG in July 2025. Once those businesses were stripped out, the remaining telecommunications core settled into a much steadier range.

Since 2022, the core business has been growing quietly but steadily. Revenue climbed from $120.7 billion in 2022 back up to $125.6 billion in 2025. The gross margin, the percentage of each dollar left over after direct costs, has also improved, rising from 76.3% in 2021 to around 79.8% in 2025. That means AT&T is keeping more of every dollar it earns. The cash the business generates from its operations has held up well too. Operating cash flow was $42.0 billion in 2021 and $40.3 billion in 2025, showing consistency across several difficult economic years.

Free cash flow is where the picture gets more complicated. AT&T generated $26.4 billion in free cash flow in 2021. By 2024, that number had fallen to $18.5 billion. In 2025 it edged back up to $19.4 billion. The gap between operating cash flow and free cash flow has widened because AT&T is spending heavily to build its fiber network and upgrade its 5G wireless infrastructure. That spending is a choice, not a crisis, but it means less cash left over each year than the operating numbers alone would suggest.

The debt load is the number that hangs over everything else at AT&T. The company carried $156.4 billion in net debt at the end of 2021. That is an enormous number. The good news is it has been falling every year since. By the end of 2025, net debt had come down to $117.9 billion, a reduction of $38.5 billion over four years. The sale of DIRECTV helped, but consistent cash generation from the core wireless and broadband business is doing most of the work.

The refocused business has two growth engines and one drag. The Mobility wireless unit generated $89.5 billion in revenue in 2025, up from $84.0 billion in 2023. AT&T served 120 million wireless subscribers in the United States at year end, including 74 million postpaid phone customers who pay monthly bills. Consumer Wireline, which includes AT&T Fiber, added 1.1 million new fiber customers in 2025 and grew broadband revenue by 8.7% for the year. The drag is Business Wireline, which serves companies and corporations. Legacy copper-based services there are shrinking fast, with revenues down 17.4% in 2025 alone. The business unit posted an operating loss of $816 million in 2025 after a small $88 million loss in 2024.

Now for the risks, and AT&T has several that are serious and specific. In July 2024, the company disclosed a cyberattack in which mobile customer call data was copied. AT&T is a critical infrastructure provider, which makes it a constant target for sophisticated hackers including state-sponsored groups. A successful major attack could damage its networks, expose customer data, and drive customers to competitors. The company also faces ongoing litigation and government investigations related to old lead-clad telephone cables. A 2023 Wall Street Journal investigation raised public health concerns about these cables, which are buried across large parts of the country. The financial and reputational cost of that situation is still unknown.

AT&T must also keep spending to stay competitive. Building fiber to millions of homes and upgrading cell towers to 5G requires enormous capital outlays every year. The company is pursuing a pending acquisition of spectrum from EchoStar Corporation and a pending acquisition of most of Lumen's fiber network. If those deals are delayed, or if the cost of network equipment keeps rising due to semiconductor shortages, AT&T's ability to grow its fiber footprint on schedule could slip. On top of all that, roughly 43% of AT&T's workforce belongs to labor unions, and several major contracts covering thousands of employees are up for renegotiation in 2026. A work stoppage or a costly new contract would add pressure to an already tight cost structure.

The fiber business is the part of AT&T that most clearly points toward the future. Consumer Wireline operating income grew 78% in 2025 to $1.547 billion, up from $869 million in 2024 and $651 million in 2023. That improvement comes directly from more fiber customers paying higher monthly rates. AT&T had 16.0 million total broadband connections at end of 2025, and fiber now makes up the majority of that base. The company also added 875,000 customers to its AT&T Internet Air fixed wireless product, which delivers home internet over the 5G wireless network in areas where fiber has not yet been built.