Of course you can make playlists in iTunes and sync them with your iPhone, but you can also create playlists on your iPhone when you’re out and about. Here’s how:
Tap the Music icon.
At the bottom of the screen, tap the Playlists icon.
If you’ve replaced Playlists with another icon as described previously, tap More, and then tap Playlists.
Tap the second item in the list, Add Playlist.
Type a name for your new playlist, and then tap Save.
An alphabetical list of all songs on your iPhone appears. Note the little + that appears to the right of each song.
Tap the + next to a song name to add the song to your playlist.
To add all these songs to your playlist, tap the + next to the first item in the list: Add All Songs.
In the upper-right corner, tap the Done button.
If you create a playlist on your iPhone and then sync with your computer, that playlist remains on the iPhone and will also appear in iTunes on your computer.
The playlists remain until you delete them in iTunes or on your iPhone. To remove a playlist in iTunes, select the playlist’s name in the source list and then press Delete or Backspace; to remove a playlist on your iPhone, swipe from left to right across the playlist and then tap the red Delete button.
You can also edit playlists on your iPhone. To do so, tap the Playlists icon at the bottom of the screen (or tap More and then tap Playlists), and then tap the playlist you want to edit. Three buttons appear near the top of the screen — Edit, Clear, and Delete — with the songs in the playlist listed below them.
Tap Clear to remove all the songs from this playlist; tap Delete to delete this playlist from your iPhone. Or tap Edit to do any (or all) of the following:
To move a song up or down in the playlist: A little icon with three gray bars appears to the right of each song. Drag the icon up to move the song higher in the list or drag down to move the song lower in the list.
To add more songs to the playlist: Tap the + button in the upper-left corner.
To delete a song from the playlist: Tap the – sign to the left of the song name. Note that deleting a song from the playlist doesn’t remove the song from your iPhone.
When you finish editing, tap the Done button near the top of the screen. And that’s all there is to creating and managing playlists on your iPhone.