I found a pretty cool site where you can prank call your friends with a rickroll or pokemon song, or you can even upload your own MP3s.

http://prankdialer.com/


1. Press Begin on the telephone

2. Click freebie

3. Click "Cool, let's continue."

4. Select which prank you would like - Click Next

5. Type in your victim's phone number - Click Next

6. Click next again

7. Press Call!

I prank called my cell to see if it worked and after I pressed called about 10 seconds later I got the call.

Enjoy