How do I change an answer-tone back to a normal ring on my cell phone?

Someone broke into my car yesterday and stole my phone. I have insurance and have since received a new phone. The person whole stole my phone changed the normal ring sound to a hardcore rap song.How do I change an answer-tone back to a normal ring on my cell phone?
you just call your voice mail and it will give you options on what you want to do... just use your common sence...

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