12. Commitments and Contingencies Wireless Spectrum On March 2, 2012, the FCC approved the transfer of 40 MHz of AWS-4 wireless spectrum licenses held by DBSD North America and TerreStar to us. On March 9, 2012, we completed the DBSD Transaction and the TerreStar Transaction, pursuant to which we acquired, among other things, certain satellite assets and wireless spectrum licenses held by DBSD North America and TerreStar. The total consideration to acquire the DBSD North America and TerreStar assets was approximately $2.860 billion. On February 15, 2013, the FCC issued an order, which became effective on March 7, 2013, modifying our AWS-4 licenses to expand our terrestrial operating authority. The FCC s order of modification has imposed certain limitations on the use of a portion of this spectrum, including interference protections for other spectrum users and power and emission limits that we presently believe could render 5 MHz of our uplink spectrum (2000-2005 MHz) effectively unusable for terrestrial services and limit our ability to fully utilize the remaining 15 MHz of our uplink spectrum (2005-2020 MHz) for terrestrial services. These limitations could, among other things, impact the ongoing development of technical standards associated with our wireless business, and may have a material adverse effect on our ability to commercialize these licenses. The new rules also mandate certain interim and final build-out requirements for the licenses. By March 2017, we must provide terrestrial signal coverage and offer terrestrial service to at least 40% of the aggregate population represented by all of the areas covered by the licenses (the  AWS-4 Interim Build-out Requirement ). By March 2020, we must provide terrestrial signal coverage and offer terrestrial service to at least 70% of the population in each area covered by an individual license (the  AWS-4 Final Build-out Requirement ). If we fail to meet the AWS-4 Interim Build-out Requirement, the AWS-4 Final Build-out Requirement will be accelerated by one year