Why we need to enable USB debugging for android phone? USB debugging needed to allow for developer to use device for developing a new application or connecting phone to another app. some application need USB debugging whenever the USB is connected to phone. How to turn on USB Debugging option on Hauwei phone? It is a bit different for other android phone, we need to do the following turn on USB debugging option.
  1.  We need to tap on setting 
  2.  Tap on About Phone
  3. Tap on Build Number ( 7 times ) until see the developer options available
  4. Click back to setting, you will see the developer options 
  5.  click on Developer Options 
  6. Scroll down to see USB debugging and turn it on. then you will available to connect your phone to another application on computer.