Ad on Stock Samsung Dialer

I have never added a third party dialer to my Galaxy s7 but all of a sudden after I complete and hang up any call, there is a full screen ad that pops up! Its driving me crazy. HELP

from Android Forums at AndroidCentral.com - Ask a Question //forums.androidcentral.com/ask-question/758453-ad-stock-samsung-dialer-new-post.html
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