Google's latest partner network in Project Fi is U.S. Cellular, which joins Sprint and T-Mobile. With Project Fi, you can get the highest quality connection at all times - whether on Wi-Fi or one of Google's partner cellular networks.

U.S. Cellular, one of the top mobile networks in the U.S., offers service in 23 states with 4G LTE coverage for more than 99% of their subscribers, both urban and rural.

In most areas, multiple cellular networks are available. But factors like obstructions from nearby buildings can impact the speed and coverage available from each LTE connection. By analyzing speeds from each network, Project Fi is able to predict the fastest network at your location - down to the city block - and automatically connect you. Part of Project Fi’s promise is to ensure you have connection when you need it, even in areas with poor speeds or limited coverage.

A Fi device recognizes when your connection is weak and adjusts in real time. By accessing multiple cellular networks, Fi users have a connection nearly 99% of the time, and spend about 95% of cellular time on LTE - which will improve even further with the addition of U.S. Cellular.

U.S. Cellular coverage will be automatically rolling out to all users over the coming weeks.