After you install the Oppo Tools application on your Oppo device, then open Oppo Tools application.
Once open, click on the COMMON tab, and then click ROOT
Then you will be asked to install the Oppo Tools Plugin, click Next
Then the installation process will run
After Oppo Tools plugin installed, then open the One Key Root menu and press One Key Root button. (re-open Oppo Tools , select COMMON and press Root again)
If successful, your phone will automatically reboot and you will find an application, SuperSU installed in your application menu
If you want UnRoot Oppo Neo 7 Smartphone, please open once again At the COMMON menu and press the button UnRoot