Enabling USB Debugging is similar is pretty much similar on all OnePlus smartphones and all close to stock UI’s. Here the guide.
Steps to Enable USB Debugging on a Smartphone
- Navigate to Settings and About Phone
- Search for Build Number
- Tap it several times to enable Developer Options
- Now you will find Developer Options in the Settings Menu.
- Open Developer Options and look for USB Debugging.
- Just tap on the checkbox to enable it.