Can I Set a Music File (MP3) as the Ringtone on my SGH-T199?
Your device can turn MP3 files you have downloaded into custom ringtones. You can also set up custom ringtones for your contacts.
Select an MP3 Ringtone
To select a downloaded or transferred MP3 ringtone, from the standby screen
Press Menu > Media > Music.
Select a song, and press Options > Set as > Ringtones.
Assign a Personal MP3 Ringtone
Press Options > Set as > Individual ringtone.
Select Search contact, highlight a contact from your contacts list, and press OK Iocn.