we will be stopping them, by assigning them names in your contact list and assigning those names a blank ringtone so that you will never hear them call you again.
Step 1: Creating the silent sound file
unplug your microphone from your computer (if you have a mic)
open your sound recorder... usually "start- programs- accesories- entertainment- sound recorder.
hit "record" and then hit "stop" a second or two later.
go to file- save as-
name it "blank" or whatever you want and save it in a place you can remember, like the desktop.