In order to boot your OnePlus 2 into recovery mode, you need to do this: first power off your device, and then after waiting for 3-4 seconds after screen goes off, just press and hold Power + Volume down button together until you see anything on screen.

If you reach a dead Android screen, then just hold Volume up button, and then press power button once, and you shall see 3e stock recovery.

Tip: If your OnePlus 2 is not responding, then you may need to force shutdown it to get the above trick working.

Alternate method to reboot OnePlus 2 into recovery mode is one that doesn’t even uses hardware buttons at all. Here’s how.

  1. Install ADB and Fastboot driver.
  2. Open a command window on your computer.
  3. Now, enable USB debugging on your OnePlus 2.
    • Go to Settings > About phone, and then tap ‘Build number’ 7 times or until you get the message ‘You’re now a developer!’.
    • Go back to Settings, then choose ‘Developer options’. Find the ‘USB debugging’ option and use its toggle button to enable it. Accept warning by tapping on OK button.
  4. Connect your OnePlus 2 to PC now. You will get a pop-up as shown below on your phone when you connect for the first time after enabling USB debugging. Select ‘Always allow from this computer’ checkbox and then tap on OK button.
    Allow USB Debugging
  5. Now, type the following command into command window and then press enter key to run it. 
    adb reboot recovery
  6. That’s it. Your OnePlus 2 will reboot into recovery mode.

Do let us know if you need any help regarding this. Use the comments section below for faster help.