ASOTV - The Cell Antenna is a passive device designed to capture stray radiation in the body of the phone and re-radiate the signal to improve the phone s performance. Works on most brands of cell phones. Makes your signal stronger reduces static improves signal in elevators tunnels buildings and more. Just install on your phone battery. A cell phone signal booster is a very effective for poor mobile signal coverage within buildings and vehicles. The Antenna will work most efficiently when installed properly. When using the phone try to avoid placing your fingers on the back of the antenna or the part of the phone where the antenna has been installed. - 1 lb - All Type Cell Phone and PDA (No Need Accessories)