Here's how Project Fi has worked out for us so far in France In and around the Paris CDG airport we had LTE the whole time. In Bordeaux we had 3G and 3G+ the whole time. In Nice, we have had 3G+ the whole time Google Duo, which is Googles version of Apples Facetime, has worked flawlessly in Paris, Bordeaux and Nice. Now here is something odd, when you are connected to wifi, it automatically uses wifi for making calls and adds the wifi label after your name. For instance, if we call anyone while on wifi, the person will get, "John Doe from www.wifi.com"