If you want to turn on the hidden developer options and USB debugging options, follow these steps:
1. Under the Standby page, click "Application".
2. Click "Set".
3. Click "General" and click "About Equipment".
4. Slide the mobile screen up and click on the "build number" seven times until the prompt "developer mode is enabled".
5. Click on the "<" icon to see "Developer Options".
Tip: This operation is done only once, the developer will always be displayed without hiding, if you want to hide this option, please back up the phone's important data, and then restore it to the factory settings. (Restore factory Setting Method: "Application"-"set"-"General"-"reset"-"Restore factory settings". )
6. Click on "Developer Options" to enter, find "USB debugging" and click.
7. Click "OK" to open the "USB debugging" option.
Note: Developer options are set up specifically for developers, and do not open them easily if necessary.