app for blocked calls

I need an app that unblocks blocked calls
location: apple.com - date: April 12, 2013
I have constant blocked calls calling day and night no answer just call and hang up...
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Is there an iPhone app that will divert incoming calls that are listed "blocked and private?"
location: apple.com - date: February 13, 2012
Is there an iPhone application that will divert or block incoming calls that are listed as "blocked" or "private." My home phone doesn't allow any blocked or private calls to ring in. I know this feature is available - I've heard it on cell phones.
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