In a letter to the U.S. Department of Justice and Federal Communications Commission, Microsoft and other companies expressed their support for AT&T’s proposed $39 billion acquisition of T-Mobile USA. “Many policy-related efforts will not be able to quickly address near-term capacity needs,” the letter stated. “The FCC must seriously weigh the benefits of this merger and approve it.” Other big names, such as Facebook, Research in Motion, Oracle and Yahoo!, have also voiced support for the merger, while Sprint has been the most outspoken opponent of the deal, which would make it the smallest major carrier in the U.S. behind AT&T and Verizon Wireless. The FCC and DOJ are in the midst of a thorough review process that promises to scrutinize every aspect of the proposed merger.