Cell phone amplifier is designed to solve the blind signal designed for mobile phone products. As the mobile phone signal is transmitted by electromagnetic waves to establish communication links, the building of the barrier, in some tall buildings inside the basement and other places a number of shopping malls, restaurants, sauna, massage and other entertainment karaoke OK, underground civil air defense projects, subway stations and many other places, cell phone signals can not reach and can not use the phone.
Linear Mode
