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

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HOW DO I GET RID OF THAT RED DOT