You can use any of these as a switch:

• An external adaptive switch. Choose from a variety of popular USB or Bluetooth switches.
• The iPhone screen. Tap on the screen to trigger the switch.
• The iPhone FaceTime camera. Move your head to trigger the switch. You can use the camera as two switches; one when you move your head to the left, and the other when you move your head to the right.

Add a switch and choose its action. Go to Settings > General > Accessibility > Switch Control > Switches.

Turn on Switch Control. Go to Settings > General > Accessibility > Switch Control, or use the Accessibility Shortcut-see Accessibility Shortcut.

Turn off Switch Control. Use any scanning method to select Settings > General > Accessibility > Switch Control.

Bail out! Triple-click the Home button at any time to exit from Switch Control.