Free Sofia - A-Class Remix ringtone for your phone. Listen first, then download the version you like. Artist: Alvaro Soler. 8 versions are available, from 16 to 38 seconds. More ringtones in the same style are under the tags disco, whistle and whistling. Two formats are available: .MP3 for Android and other phones and .M4R for iPhone. All ringtones by Alvaro Soler are collected on the artist page.