To turn TalkBack off, suspend it first so you can navigate the touch screen normally, and then turn it off in Settings. 
 
- On the Home screen, draw an "L" with your finger to display TalkBack controls.
 
- Tap Pause feedback. 
 
- Tap the OK button, and then double-tap the screen  to suspend TalkBack.
 
- Go to , and then tap  the On/Off switch to turn TalkBack off.