Need help please ,,, block calls !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!

[ilba7raini]

hi all
im locking for an app that will block all calls except for certain contact with out giving a busy sound for the caller cus i know i can do it on dnd but dnd will not show me all calls i missed plus the caller will know that he was blocked because of the busy sound when they call which i dont want

so im looking for an app where i can put all on silent(ring but no sound ) except for certain contacts