I inquired via the Google Fi website. They emphasize that at this time its meant for use in USA. But they say that it will work instantly in Italy, Spain, Croatia, Argentina. The Iphone is still beta and seems to require them to do some handholding during installation. It requires a sim card that is only available in the USA. I'm thinking of ordering one to try on my next trip. Often, when I land, the airport phone stores aren't open or have lines, so I'm without maps or waze or whatsapp until I can find an open phone store and buy a local sim card.