The wireless business contributes nearly 70% of AT&T's revenue. The company is the third-largest US wireless carrier, connecting 73 million postpaid and 17 million prepaid phone customers. Fixed-line enterprise services, which account for about 14% of revenue, include internet access, private networking, security, voice, and wholesale network capacity. Residential fixed-line services, about 12% of revenue, primarily consist of broadband internet access, serving 14 million customers. AT&T also has a sizable presence in Mexico, with 24 million customers, but this business only accounts for 3% of revenue. The company recently sold its 70% equity stake in satellite television provider DirecTV to its partner, private equity firm TPG.

, and AT&T's $T stock dropped more than 10% today, its worst day since the dot com bubble in 2000. Despite this, some investors are still holding the stock, citing its debt and operational issues. The stock is also volatile, with a really ugly chart. AT&T's earnings were also released today, with the stock finishing down 10.43% to $17.65.