What is a mobile signal booster and how dose the booster work?

Mobile signal booster (also known as mobile signal repeater / amplifier) are designed to amplify a weak outdoor signal and provide a strong inside signal to an poor signal area.

A mobile signal repeater kit has three main parts, an outdoor antenna that receives the initial signal, the repeater that boosts the signal, and an indoor antenna that broadcasts the boosted signal to the inside area that needs it.  Antennas and repeater are connected together with high quality cable

The repeater system work like this :

1.The outdoor antenna collect the signal and transimit it to the repeater

2.The repeater amplify the signal tansimited and send it to the indoor antenna

3.The indoor antenna broadcast the signal and the mobile phone receive the amplified signal.