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7. AT&T
Fortune rank: 7
2008 profit: $12.87 Billion
Exclusive contracts for smartphones like Apple's iPhone and Blackberry's Bold led to 8% profit growth at the country's No. 2 wireless carrier.

AT&T had twice as many smartphones in service than its competitors in 2008. Expensive data plans for the phones grew the company's wireless business revenue by 53% to $10.5 billion.

NEXT: International Business Machines
Last updated April 20 2009: 11:09 AM ET
2009 Fortune 500
Top 50
Top 50
Exxon Mobil pushes Wal-Mart aside to retake the No. 1 slot this year. Which other companies made the top 50 this year? More
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As many big companies are announcing mass layoffs, these Fortune 100 employers have at least 150 openings each. More
The biggest losers
The biggest losers
Companies from AIG to United Airlines, from ConocoPhillips to Motorola lost billions of dollars last year. Who lost the most? More
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