How do I Put Music on My iPhone?by Jason Spidle ; Updated September 28, 2017
You may quickly put music on your iPhone by using the iTunes application to sync your entire music library, select playlists or individual songs to the device, depending on your preferences. Once you've configured iTunes to do this, you can easily add new music to your iPhone through the iTunes interface, or change your sync preferences.
Connect the iPhone to your computer and launch iTunes.
Select the iPhone from the "Devices" section in the iTunes sidebar.
Click the "Music" tab and select the items from your music library that you wish to sync.
Click "Apply," and then click "Sync" to transfer your music selections to the iPhone.