1. On the standby page, after we find the "application" specific operation of the screenshot shown below.
2. After we find it, we will "set" the specific operation as shown in the screenshot below.
3. After we find a lighter "general", and then select "About the device" specific operation as shown in the screenshot below.
4. After we find the "build number" 7 times, we will be prompted to "developer mode enabled" as shown in the screenshot below.
6. After we find a lighter "<" icon, you can see the "developer Options" specific operation as shown in the screenshot below.
Friendly Tips
If you are directly connected to the computer also to open the USB debug mode but also need to install a mobile phone driver, if you use like 360 mobile phone assistants, 91 mobile phone assistants or some of the domestic brush machine tools they will automatically install the mobile phone driver, If not installed we can use Kies software to install the driver, only after the installation of the mobile phone and computer connection and use will be normal OH.