Windows Phone 7. The main screen has customizable Uve Tiles with real-time updates from the Web and social networks, ltdrives large displays—we've seen it on phones with 4.3-inch screens—and supports networked, player-to-player gaming. One omission: At press time, it lacked cut and paste. The older Windows Mobile OS remains on a few phones, none of which we now recommend. APPS There were about 1,000 at press time. The system can access movies and music in Zune marketplace.