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Have you ever wished your iPhone would ring only when certain people call? Here’s how to do it:

1. Download the “Silence” ringtone here: silence.m4r
2. Copy this file into the Ringtones section of your iTunes.
   
   
3. Sync your iPhone with iTunes to load the ringtone.
4. On your iPhone, change your ringtone to “Silence” (under Settings -> Sounds -> Ringtone). You’ll no longer hear your phone calls.
   
   
5. For each person whose calls you still want to hear, change his or her Custom Ringtone to something audible: Click the name in your contact list, choose Ringtone, then choose something besides Default
   
   

Now you can screen calls in your sleep. Because Sunday afternoons are for napping.