How to play specific sound for specific number using incoming calls [closed]

It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center. Closed 11 years ago.

Hi all my clients want to create a black list app in which I want to drop signals or play开发者_Python百科 sound to users when call comes from that user. How can this be implemented?

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You shouldn't implement such thing. Even with available workarounds, the application will break if the internal API that the workaround is based on will be changed.

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Seriously, don't. No one would want an app acting like that.