&gt; - Allow Siri from the lock screen<p>Lots of people use &#x27;Hey Siri&#x27;, myself included.<p>&gt; - Have headphones plugged in (presumably Apple&#x27;s)<p>Not that unlikely.<p>&gt; - Are not using their device or have their headphones in (otherwise the attack would be detected immediately) OR:<p>&gt; - Have audible feedback from Siri disabled<p>These would be the killers. The moment Siri&#x27;s activated you&#x27;d hear it loudly in your ears.