TFWI is a subsidiary of Verizon Communications, and offers products and services under several brands. It operates as a mobile virtual network operatormobile virtual network operatorGoogle Fi (pronounced /faɪ/), formerly Project Fi, is an MVNO telecommunications service by Google that provides telephone calls, SMS, and mobile broadband using cellular networks and Wi-Fi. Google Fi uses networks operated by T-Mobile and U.S. Cellular. Google Fi is a service for US residents only, as of late 2019. (MVNO), holding agreements with the United States' largest wireless network operators to provide service, including AT&T Mobility, T-Mobile US, Verizon and UScellular.