Sleek and Tiny Portable Palm Phone Jammer The Portable Palm Phone Jammer does pretty much what the name suggests – it jams the phone signals of mobile phones that are within 5-10 meters of the device. This can be a very handy tool in situations where you want to be free of any disturbances – particularly those that might result from the sudden ringing of a cell phone or the … [Read more...] about How Can I Play A Prank On My Friends And Family By Jamming Their Cell Phone Signals