You can download Blake Shelton, Gwen Stefani - Nobody But You ringtone for free on your phone. The mp3 format file of this ringtone from the song that Blake Shelton, Gwen Stefani sings can be set on smartphones with Android OS, and for iPhone with iOS you need the m4r format or use an application, that can be installed from the Google Play Store or App Store, to convert the "Nobody But You" to m4r file.