Play alert sound (same as default message ringtone)
Yes it is possible, but they use undocumented enum values, that means you should not use it on AppStore apps. AudioServicesPlaySystemSound(1003); iOS SDK does not bundle these sound files, but you can find them on the device in the /System/Library/Audio/UISounds/ folder. However, I believe these files are copyrighted. Why not create a sound yourself?