Antenna Booster is a passive device to capture stray radiation in the body of the phone and re-radiate the singal. ... Radios, PDA's, Walkie Talkies, Beepers, and even Cordless Phones in your house. Improved Generation VI Cell Phone Antenna BoostersOur generation ... antenna on your cell phone. 2) Improves Reception, Reduce Static in boats, elevators, cars, buildings, tunnels, and mountains. 3) Works on ...