Principle of signal amplifier

The principle of mobile phone signal amplifier is very simple, I believe anyone who knows a little physics will understand it, but the process of groping is very difficult. I bought a small antenna mobile phone signal amplifier, which consists of outdoor antenna, indoor antenna, antenna host, feeder and power adapter.

What is photo studio software? How to use it? It is best to use pictures to explain a paragraph of text! thank you

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