Interestingly, the Dash uses wi-fi controlled by the setup app to be configured with an Android phone, but because the app can&#x27;t control the wi-fi on an iPhone it uses ultrasonic signals: <a href="https:&#x2F;&#x2F;www.amazon.com&#x2F;gp&#x2F;help&#x2F;customer&#x2F;display.html?nodeId=201746340" rel="nofollow">https:&#x2F;&#x2F;www.amazon.com&#x2F;gp&#x2F;help&#x2F;customer&#x2F;display.html?nodeId=...</a><p><i>You may need to increase your iPhone volume, since Dash Button uses ultrasonic tones to sync with your iPhone during setup.</i>