Reuters: AT&T, long the No. 2 U.S. wireless carrier and since July the world’s biggest pay-TV operator, reported an 18.6 percent rise in quarterly revenue, helped by its DirecTV acquisition and as it added more prepaid mobile subscribers. The company, reporting its first earnings since completing its $48 billion acquisition of satellite TV operator DirecTV, said total operating revenue rose to $39.1 billion from $33.0 billion.