After checkout you will immediately receive an email containing the .m4r file to download.
Connect your iPhone to iTunes & navigate to the Tones section. Click either “All tones” or “Selected tones” (check the box next the Petey ringtone). Then apply and sync your phone as normal. When the sync is done, your ringtone should be available in the Sounds settings of your iPhone.
Tap “Settings” on your iPhone, tap “Sounds”, then tap “Ringtone” and select Petey!