FAQ: “Through new technology developed with our partners, Project Fi puts you on the best available network between Wi-Fi and three 4G LTE networks. This means you get access to more cell towers and 4G LTE in more places.

• Project Fi is available on the Pixel, Android One Moto X4, Nexus 6P, Nexus 5X, and Nexus 6. Currently these are the only smartphones to support our network of networks.
• You must have the North American model of the above devices in order to use it on the Project Fi network. For more information on compatible devices click here….”
• No, there is no annual service contract required when you sign up.

• Project Fi has partnered with Sprint, T-Mobile, and U.S. Cellular, three of the leading carriers in the US, to provide our service. You can view our US coverage at fi.google.com/coverage…”