How to install a ringtone on
1. Choose and download a ringtone from the site
2. Save ringtone file (m4r) in your computer and
locate it's folder.
3. On iTunes, Click on the 'Ringtones' tab in iTunes
left side under Library, and drag the ringtone file to iTunes. You
can also click the file menu on top left of itunes and select 'Add
file to library...'
4. Connect your iPhone, click on your iPhone name in
iTunes left side, and select the ringtones tab in top center . Make
sure that 'Sync ringtones' checkbox is on.
5. Sync your iPhone, and define the ringtone on
settings > sounds > ringtones.