By PETER SVENSSON NEW YORK - AT&T Inc. said Sunday it will buy T-Mobile USA from Deutsche Telekom AG in a cash-and-stock deal valued at $39 billion that would make it the largest cellphone company in the US The deal would reduce the number of wireless carriers with national coverage from four to three, and is sure to face close regulatory scrutiny.
AT&T to buy T-Mobile USA for $39 billion