https://qooah.com/2014/01/10/zte-%e6%8e%a8%e5%a4%9a%e5%8a%9f%e8%83%bd-android-wifi-hotspot-%e5%8f%af%e4%bd%9c%e7%a7%bb%e5%8b%95%e9%9b%bb%e6%ba%90%e6%88%96%e6%8a%95%e5%bd%b1%e6%a9%9f/