Are you aggravated every time you must leave a voice mail message just to have someone call you back? or have to retrieve a voice mail message just to find out who is looking for you? How much time and money do you spend every day on leaving and retrieving voice mail messages?
Voice-mail messages are a pain because they don`t lend themselves to quick scanning the way SMS messages do - you can only listen to them one at a time, and you have to listen to the whole thing to get the sense of the message.