To deactivate TalkBack on the OnePlus smartphone again, it takes a little more than navigating to the settings of the operating aids, since the TalkBack function changes the control of the device as follows:

Note: In this tutorial we will concentrate on the special navigation of TalkBack to successfully turn off the function.

Android 10 | OxygenOS 10.0
Step 1:  Tap on  Settings
Step 2:  Tap twice on  Settings
Step 3:  Swipe with  two fingers  to scroll
Step 4:  Tap on  System
Step 5:  Tap twice on  System
Step 6:  Tap on  Accessibility
Step 7:  Tap twice on  Accessibility
Step 8:  Tap on  TalkBack
Step 9:  Tap twice on  TalkBack
Step 10:  Tap on  Use service
Step 11:  Tap twice on  Use service
Step 12:  Tap on  Stop
Step 13:  Tap twice on  Stop  to disable TalkBack
  1. Tap on Settings
  2. Tap twice on Settings
  3. Swipe with two fingers to scroll
  4. Tap on System
  5. Tap twice on System
  6. Tap on Accessibility
  7. Tap twice on Accessibility
  8. Tap on TalkBack
  9. Tap twice on TalkBack
  10. Tap on Use service
  11. Tap twice on Use service
  12. Tap on Stop
  13. Tap twice on Stop to disable TalkBack

OnePlus Instructions