Able to provide 2G/3G network services where the signal cannot be covered -Integrate the frequency of walkie-talkies and smartphones to develop wireless technology in-house to support 2G/3 networks of smartphones -In the absence of signal, self-assembled wireless area network, used in smart phones in remote areas without signal. This wireless local area network can be connected via wireless connection tens of kilometers away and where there is a 3G/4G signal
