Connected portable media players (PMPs) embed a wireless WAN digital cellular or Wi-Fi connection to connect to services designed to enhance the media playback experience, including direct-to-device content downloads, music ID capabilities, music discovery features, social networking features, and streaming Internet radio functions. In addition, more of these products are being based on mobile operating systems, including Apple’s iOS and Google’s Android, which allows them to run applications and browse the Web. Apple is the major vendor of connected PMPs with its iPod touch model, but other vendors, including Microsoft, Creative, iriver, SanDisk and Archos, also sell connected PMPs. PMPs are distinguished from media tablets by having a screen size smaller than 5 inches, and from a smartphone or mobile phone by the lack of a WAN cellular connection capable of making cellular-based voice calls.