You can download BTS feat. Halsey - Boy With Luv ringtone for free on your phone. The mp3 format file of this ringtone from the song that BTS feat. Halsey 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 "Boy With Luv" to m4r file.