Let's face it: Parading around town with a giant bulge in your pocket just isn't comfortable--for you or the person who catches a glimpse of it. Unless you don't mind clipping your phone to your belt, which we don't advocate either, a thin phone is your best bet. Check out these slim, discreet, and very affordable phones that you can slip in your pocket and forget about until an incoming call or text message sets them vibrating.