How to Get a Ringtone on an iPhone
The iPhone only offers a few standard ringtones, but the iTunes Store offers thousands of additional alerts that play real songs instead of traditional rings or beeps. These ringtones provide a more personalized experience, so you may want to acquire one. You can do so directly on your phone through the iTunes Store app, which has a section devoted to ringtones. As of May 2011, these ringtones cost about $1.
Go to your iPhone's home screen and tap the iTunes Store app, which is purple with a white musical note.
Tap "More" in the bottom row of buttons.
Tap "Ringtones" in the menu that appears.
Tap "Genres," "Top Tens" or "Featured" at the top of the screen to browse for a ringtone that you want.
Tap the price button next to the ringtone that you want to download. Tap it again when it turns green.
Tap either "Set as Default Ringtone" or "Assign to Contact" in the blue dialog box that appears if you want to use the ringtone right away. If you just want to download it, press "Done." Enter your Apple ID and password in the next dialog box to confirm the download. You can access the ringtone in "Settings" under "Sounds" to use it in the future.