Using Wi-Fi for mobile calls and data are becoming increasingly popular and save money for users. Big wireless carriers have spent billions of dollars building networks and spend billions more to upgrade the service. It requires expensive and scare electromagnetic spectrum to send signals. However, Wi-Fi is already a router based network that one can access without costing too much money. Almost every home in the U.S. now has a router at home creating a web of Wi-Fi. Since Wi-Fi does not require a license from the Federal Communications Commission (FCC) service can be provided at much cheaper rate.

According to Cisco Systems more than one-third of data traffic in 2012 used Wi-Fi or went through a router and it is expected to grow to more than 50 percent by 2017. More and more are relying on Wi-Fi to avoid expensive data fees charged by carriers. AT&T is the only U.S. carrier that widely uses Wi-Fi saving money for its customers and it has more than 32,000 hotspots under agreements. Cable providers in the US are sitting on a readily available vast Wi-Fi network if they chose to enter into voice and data services.