Following AT&T’s failed attempt to acquire T-Mobile USA from Deutsche Telekom for $39 billion, AT&T had to pay a lofty break-up fee as per the terms of its agreement. AT&T’s related expenses totaled $4 billion, and included in that sum was the transfer of AWS spectrum licenses to T-Mobile in 128 different markets. On Wednesday, T-Mobile announced that the Federal Communications Commission has approved the transfer. “We applaud the FCC for acting swiftly to approve the transfer of these spectrum licenses,” T-Mobile CTO Neville Ray said in a statement. The nation’s No.4 carrier will use its newly acquired spectrum to help build out its next-generation 4G LTE network, which it hopes to launch next year.