AT&T feels the burn in Q1 as mobile competition heats up

AT&T chief executive Randall Stephenson late on Tuesday admitted his company responded slowly to the return of unlimited plans, but insisted the telco has the requisite network capacity to cope with the expected rise in usage.AT&T lost 348,000 lucrative postpaid phone customers during the first quarter. Similarly Verizon last week revealed it lost 289,000, as the aggressive pricing strategies of T-Mobile US and Sprint took their toll.AT&T stopped offering unlimited tariffs to smartp