pro- vide cable TV comes from over-the-top providers such as Hulu, YouTube, and Netf- lix. Over-the-top providers transmit TV shows and movies to consumers over cable and telephone company broadband networks. These services attract customers in part because of their lower costs compared to subscriptions to traditional pay-TV services. While most subscribers keep some cable TV service, many have dropped premium services in favor of lower-cost options. Netflix is now the largest provider of pay-TV service in the United States. To counter this competition, cable TV and telephone com- panies are developing the ability to transmit the content subscribers pay for to laptop and tablet computers. Although none of the major cable operators own mobile networks, they do resell mobile services. This mobile traffic is carried on other carriers' networks. At one time, the majority of cable operators' mobile offerings were carried on Sprint Nextel and Clearwire's networks. Operators that resell mobile services rely on the availability of spare capacity on wireless networks and the financial health of these mobile carriers. Comcast and other MSOs invested in Clearwire to cement their relationship with them. However, as of the second quarter of 2011, Clearwire was operating at a loss and the cable companies had sold very little mobile services. Time Warner Cable and Comcast both decided to end their agreement to sell services on the Clearwire network. They instead made an agreement to sell their spectrum to Verizon and resell service on the Verizon Wireless network. The spectrum sale requires regulatory approval. Cox Cable started to build its own mobile network, but shut it down in 2011. Building a mobile network is a costly endeavor that requires vast resources. It's not unusual for organizations to underestimate the cost and complexity of building a mobile network. When it shut down its network, Cox announced that it would resell mobile services. Internet-based companies including Apple, Google, Amazon, and Microsoft have had 