I need an Android App that will suppress any ringing on my phone, allow the playing of a Voice message advising the caller to unblock their number (Ie: Enable Caller ID) and call again.
Ideally, there would be no ring on my phone by calls without caller ID enabled and they would automatically get rejected and given the opportunity to leave a voice mail with a return number.
This would take care of 95% of the spam/scam calls & SMS's that I receive.
I do engage in the occasional scam baiting, so I'd like to have the option of letting those calls through occasionally when I'm in the mood, but for the most part, I want all private numbers blocked.
Anyone know of such an App?
Edit: Please also see my comment here: https://www.experts-exchange.com/questions/29111040/NEED-HIGH-LEVEL-cellular-system-design-engineer-developer-to-answer-please.html#a42636117