[Alert sounds] I made some custom alert sounds: Voicemail, SMS, new mail, etc
You can try them at
Just SSH them into your /System/Library/Audio/UISounds folder.
Alarm.caf is a Calendar alert
new-mail.caf is for Mail (obvious)
Voicemail.caf is obvious
sms-received6.caf is what I use for SMS. You need to use the "Electronic" setting in Settings > Sounds > New Text Message> Electronic. I didn't like the original Electronic sound so replaced it with this one.
My ojective was to get some sounds I could actually hear. If you like one for a different function, just re-name it. It's a good idea to make backups of the originals.