In a surprising move AT&T and Deutsche Telekom today announced that they have entered into a definitive agreement under which AT&T will acquire T-Mobile USA from Deutsche Telekom in a cash-and-stock transaction currently valued at approximately $39 billion. The agreement has been approved by the Boards of Directors of both companies.

According to AT&T, acquisition of T-Mobile USA provides an optimal combination of network assets to add capacity sooner than any alternative, and it provides an opportunity to improve network quality in the near term for both companies’ customers. In addition, it provides a fast, efficient and certain solution to the impending exhaustion of wireless spectrum in some markets, which limits both companies’ ability to meet the ongoing explosive demand for mobile broadband.

Also with this transaction, AT&T commits to a significant expansion of robust 4G LTE (Long Term Evolution) deployment to 95 percent of the U.S. population to reach an additional 46.5 million Americans beyond current plans – including rural communities and small towns. With this acquisition, AT&T will become the biggest network with over 128 million customers.

“This transaction represents a major commitment to strengthen and expand critical infrastructure for our nation’s future,” said Randall Stephenson, AT&T Chairman and CEO. “It will improve network quality, and it will bring advanced LTE capabilities to more than 294 million people. Mobile broadband networks drive economic opportunity everywhere, and they enable the expanding high-tech ecosystem that includes device makers, cloud and content providers, app developers, customers, and more. During the past few years, America’s high-tech industry has delivered innovation at unprecedented speed, and this combination will accelerate its continued growth.”

As part of the transaction, Deutsche Telekom will receive an equity stake in AT&T that, based on the terms of the agreement, would give Deutsche Telekom an ownership interest in AT&T of approximately 8 percent. A Deutsche Telekom representative will join the AT&T Board of Directors. The acquisition is subject to regulatory approvals, a reverse breakup fee in certain circumstances, and other customary regulatory and other closing conditions. The transaction is expected to close in approximately 12 months.