Ferrari are using smartphones Microsoft Lumia 950 XL in addition to the screens where we send images and data to the pilot while keeping it inside the car in the garage. Many F1 teams have made agreements with companies in the electronics industry to provide them with the screens to change to see their logos on them when TV cameras recorded during the weekend, so this is nothing new.
What is surprising is that the team that has historically worked more with Microsoft, at least in these last few years has been Lotus (now Renault F1). However, Ferrari has not shown the logos of the firm of Redmond in your kits or cars, but now seems to have reached some sort of deal to show the new Lumia 950 XL and see if Windows Phone fails to attract the interest of someone, as that seems to a platform finished.
Something similar happened with Blackberry as a sponsor of Mercedes, a sponsorship that has come to an end due to the lack of popularity of these smartphones, so successful in the past and that have not been reinvented with the arrival of Android, something that also happened to the prestigious Nokia (now part of Microsoft to provide the Lumia with Windows Phone). But I think that will happen as with the Blackberry, you will end up giving up when unable to climb due to the domain of iOS and Android in this sector.
The function of these Lumia seems to offer additional information (the state of the vehicle supposedly, although it could also be for burning, that will integrate some type of app that was jointly developed for any purpose, etc) to the pilots while in the cockpit. To this end they have coupled a bracket (similar to a dock to place the mobile) to traditional screens for placing the Lumia 950 XL. What is certain is that this could give some visibility to the operating system Microsoft Windows Phone how bad it is.