AT&T plans to acquire T-Mobile USA from Deutsche Telekom in a cash-and-stock deal valued at about $39 billion, the companies announced Sunday.

The deal should allow AT&T to add network capacity sooner than any alternative, the companies said in a statement. The acquisition will also allow AT&T to bring LTE (Long Term Evolution) technology to T-Mobile customers, according to the statement.

"This transaction delivers significant customer, shareowner and public benefits that are available at this level only from the combination of these two companies with complementary network technologies, spectrum positions and operations," said Randall Stephenson, AT&T Chairman and CEO.

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