Get better reception instantly with the Cell Phone Antenna! Ultra thin, this device can be used in any mobile phone. This small but powerful antenna simply mounts inside your battery compartment, taking up no additional space! Filtering away heavy static, background noise, broken connections, bad reception and interference, the Cell Phone Antenna is a must for anyone who uses a mobile phone! Now you can use your phone anywhere the need arises. Elevators, cars, trains, tunnels, indoors, remote areas...everywhere you go! Increase your signal by 30% Works with any mobile phone Ultra thin Improves reception No more static or interference Allows you to use your phone anywhere Includes Anti-Rad Guard as a special bonus to reduce the amount of harmful electromagnetic waves.