All ActivityMost RecentMost LikesSolutionsRe: Does anyone use Google FI for their cellular service? Trackrig wrote: Supposedly, Google, who has service contracts with Sprint, ATT and Verizon, will switch your call to whichever carrier you have the strongest connection to at the time your call is placed. Does anyone have experience with using Google FI? I have Visible (which uses the Verizon network) as my main internet hotspot because it is cheap and truly unlimited. Google Fi is on my primary smartphone and serves as a backup hotspot because it connects calls and data through Sprint, T-Mobile, US Cellular, and various wifi networks. Between the two of them that covers all of the top five US cellular networks except AT&T. I'd say I use Visible more than 95% of the time. Every once in a while I'll have poor or no signal on Visible and be able to use Google Fi instead. More often, if one isn't working then neither does.