The deal also has big implications for AT&T's spectrum holdings: the carrier says Leap's PCS and AWS bands are "largely complementary to AT&T’s existing spectrum licenses" and that it will "immediately" put all unused spectrum gained in the deal towards its growing 4G LTE network — once the acquisition is approved. Owners holding 29.8 percent of Leap shares have already agreed to vote in favor of the sale, but AT&T still needs to convince other shareholders and get the OK from the FCC and Justice Department. The company expects that process to take between six and nine months. Thankfully for Ma Bell, the road to gaining approval shouldn't be nearly as contentious as that of its failed T-Mobile buyout.