I have certain people (incoming callers) I do not like to chat with on the phone. I'd rather email or text them. I realize i can press the top button two times to automatically send them to my voicemail, but -- I feel they will know I am screening the call. I am DESPERATELY looking for an app that will send certain callers directly to my voicemail, appearing (to them( that my phone is off. Can anyone give me a hand? I realize there are apps like SlyDial for my calling THEM -- but what I want is the opposite -- an app for INCOMING callers to go straight to my VM.