the use of a mobile phone as a wireless internet connection to which you can connect other devices

I've been using wi-fi tethering through my mobile phone. 我一直通过手机使用无线网络共享。

Tethering lets mobile phone owners use their devices as modems for other devices. 网络共享让手机用户可以把手机当作调制解调器供其他设备使用。