HOW TO SYNC YOUR RINGTONES TO THE iPHONE
1. Open iTunes and make sure that your iPhone is connected to your computer.
2. Click on DEVICES -> APPS -> scroll down to FILE SHARING -> highlight the tones you wish to sync -> click on the SAVE TO button at the bottom and save this, for easy access, to a file (maybe title it My Ringtones) on your desktop.
3. Go back to LIBRARY -> and drag your tones, from your desktop file, to the (bell icon) TONES (this took the place of the RINGTONES tab under DEVICES -> APPS, if you are not showing this icon then go to EDIT -> PREFERENCES -> GENERAL tab and make sure that the TONES box is checked).
4. Click on the arrow just left of the name of your device. You will see a list of folders.
5. Drag your ringtones to the (bell icon) TONES.
6. Check on your iPhone -> Settings -> Sounds and the new ringtones should be at the top.
iPhone 4S, Windows 7