Using the iPod on your iPhone
Re-create iPod audio controls If you listen to audiobooks on an iPod, you probably know that, since the fourth-generation iPod's release, you've had the option to make the playback speed faster or slower, as you prefer. The iPhone shares that feature.
How to make your Apple iPhone do more
Just tap on the Settings button and then on the iPod option; tap on the Audiobook Speed entry and, in the resulting screen, choose Slower, Normal, or Faster. Other iPod features also appear on the iPhone: you can use the Settings screen to turn on Sound Check (to make volume more consistent from one track to another) and to select any of 22 included equalisation presets.
Change iPod icons By default, the buttons at the bottom of the iPod screen are Playlists, Artists, Songs, Videos, and More. You can change those first four in the same way as you would the commands that appear on an iPod's main screen. Simply tap on the More icon, and then tap on the Edit button in the upper left corner of the resulting screen.
A Configure screen will appear with icons for Albums, Podcasts, Audiobooks, Genres, Composers, Compilations, Playlists, Artists, Songs, and Videos. To substitute one of these icons for one that appears at the bottom of the iPod screen, just tap and hold on the icon you prefer and drag it over the icon you want to replace. Tap on Done when you're finished.
Delete already-viewed videos Even 8GB can feel confining when it comes to storing videos; a single full-length movie can take up 1GB of storage. To ease the storage crunch, the iPhone offers to delete videos after you've finished watching them.
Just tap on the Delete button, and Pirates of the Caribbean will disappear from your iPhone, freeing up more space.