The Google Fi MVNO service has been around for a few years now, and it aims to give customers a reasonably-priced alternative to traditional carriers like AT&T and Verizon while offering a few of its own perks. While Google Fi is technically supported on a broad range of Android and iOS devices, Google has reserved the complete Google Fi experience
Source: Hot Hardware – Google Fi Beefs Up With Wi-Fi Calling, Spam Protection For Non-Pixel Devices