1. This we need to click on the phone's "app" to enter.
2. Then find "Set" click to enter.
3. If you are using the Android 4.2.2 version of the user you will find that there is no USB development options, this is not urgent we click on the interface of the "about the device."
4. Into the following interface we find the "build number" and then click 7 times, is a continuous click, and then see "developer mode is enabled."
6. Click on the "<" icon and slide up the phone screen to see "Developer Options".
Experience Summary
If you're just an ordinary user, I think you have a USB debug. In addition to installing the software or the phone to connect to the computer to install the software, there is no more and better to ask, of course, if you can install the software on the phone does not need to open this function oh, this is specifically for developers
