Project Fi

     Google Fi is a low-cost service that operates over Wi-Fi whenever possible. When no connection is available over Wi-Fi, the service will use the sprint or T-Mobile network, whichever happens to be stronger in that location. On the other hand, you will jump on free Wi-Fi whenever it is available, so your data usage is kept to a minimum. Also, when you are not using cellular data, Google will give you some money back.
     I think this project is useful because without any activation fee or service commitment, you can use the best connection, Sprint, T mobile, or wifi to communicate.