AT&T tries to overturn T-Mobile victory on data roaming prices

One month after T-Mobile US won a declaratory ruling that could force AT&T and Verizon Wireless to charge lower prices for data roaming, AT&T is trying to reverse the decision. The Federal Communications Commission order siding with T-Mobile will create a "hopelessly vague and unpredictable" standard for determining whether roaming prices one carrier charges another are reasonable, AT&T said.