Im having trouble finding an option if any to set individual notification sounds to different types of messages. For example have one sound for sms, another for voicemail, and so on. Right now the phone is set to a notification sound, but its the same sound for all types of notifications. When I hear the sound I never know if its an email, sms, mms, or a voicemail. There has to be a certain option somewhere for this. Please help.