Block Phone Calls Using Your iPhone

Previously, I've always wondered how to block certain contacts in my iPhone such that when that particular number calls in, the phone will not ring. Recently I finally found a way to block those phone calls while still allowing the other calls to come in.

The concept is very simple. Assign an empty ringtone to that contact. Therefore when that contact calls in, your iPhone will use the empty ringtone and you will not hear a thing. :)

To do that, just do the following:

1. Save the phone numbers you wish to block into the iPhone.
   
2. Create a 25 second ringtone of silence. You can also get the ringtone which I've created here using the Sound Recorder and the post here to convert the sound file into a ringtone.
   
3. Add the ringtone into the iTunes Library and sync it to your iPhone. You should see a Silence option under Custom Ringtone.
   
4. Edit the contacts of the phone numbers in the first step and assign the Silence ringtone to them.

That's it. No more nonsense phone calls. :)