The antitrust division of the United States Justice Department will investigate Verizon Wireless’s plans to acquire spectrum from Comcast and its partners for $3.6 billion. Verizon Wireless announced in early December its intentions to purchase 122 AWS spectrum licenses from SpectrumCo, a joint venture between Comcast, Time Warner Cable and Bright House Networks. The carrier said it plans to use the additional spectrum to build out its 4G LTE network, pending government approval of the purchase. The Justice Department has the power to block the deal, although it is unclear when the investigation will be concluded.