You know all the shows and movies that people use those portable phones that diguise there voice. Well there a cheaper way to this and it's a whole lot more portable.
Step 1: Diguising Your Voice
Find something to stick in your mouth. A pencil, stick, whatever is at hand. Experiment with different things. You can also change the pitch of your voice.
Step 2: Diguising Your Voice
Put the thing that you have in your mouth and talk. Use this technique to talk to peolpe over phone and it will diguise your voice and people won't know who you are.