Breaking: AT&T (NYSE:T) to buy T-Mobile USA from Deutsche Telecom (OTCQX:DTEGY) for $39B in cash and stock. Noting the cut-throat nature of the U.S. telecom market, AT&T says the deal "quickly provides the spectrum and network efficiencies necessary for AT&T to address impending spectrum exhaust in key markets driven by the exponential growth in mobile broadband traffic on its network." (PR)