"silent" call blocking; please help

[Android Central Question]

For personal reasons, I need to find a way to essentially block someone from calling me but in a way that the caller does not notice, as in, the caller will hear ringing until they hang up (i have no voicemail set up)
*so basically allow someone to call me but make it so i do not see them call.

 

[SpookDroid]

That's pretty much how most devices' blocking feature works. Call basically gets ignored, not sent to voice mail automatically.

 

[ManiacJoe]

The only way to get the caller to not go directly to voicemail or get the call immediately terminated is to let the call ring on your phone. You can easily create a 2 second MP3 file of silence and set that as the caller's custom ringtone, but your phone will still go through all the visual effects for incoming calls.

Why not just let the block/reject system immediately end the call?