How to get the red circle off of my phone icon on an iPhone 5s?

I just got my new iPhone 5s ad I saw that there was a little red dot above my phone icon. I opened the app and the red dot was under voicemail. I opened voicemail and it has an automated message that said if you have a mailbox on this system press star if you would like to leave a message for some one please type in there ten digit number now. All i want is to be able to have the automated voicemail answering machine and get rid of that red dot i have even tried entering my own number and a number of other things. Does any one know how to get this red dot off and have the automated answering machine?

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