Google's Project Fi will soon have more coverage options, with U.S. Cellular joining the project as a cellular partner. The carrier joins Sprint and T-Mobile in providing cellular coverage for Project Fi customers.

From Google:

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. With the addition of a third network, Project Fi now gives you more coverage and speed, helping you stay connected wherever you are.

Project Fi works by trying to connect customers to the best signal possible, whether it's cellular or Wi-Fi. The service will automatically adjust your connection if it recognizes that you're experiencing issues.

U.S. Cellular service will be rolling out to all Project Fi customers in the coming weeks.