This applies to all OnePlus devices including OnePlus 6T, OnePlus 6, OnePlus 5T, OnePlus 5, OnePlus 3T, and OnePlus 3.
- Fastboot mode
- Power off the device.
- Press and hold Volume Up + Power button.
- Release the Power button when you see the OnePlus logo and keep holding the Volume Up button until you see the fastboot mode splash screen.
- Recovery mode
- Reboot to fastboot mode as shown above.
- In the fastboot mode, use the Volume keys to navigate to Recovery Mode and use the Power button to select it.
- Alternatively, with the device powered off, press and hold Volume Down + Power button until you see the OnePlus logo.