This is super easy to do accidentally if you log into Google while simulating a mobile device in Chrome devtools, because your user agent string tells Google what device you are using.<p>First verify you don&#x27;t have an iPhone (or whatever) in your recently used devices: <a href="https:&#x2F;&#x2F;security.google.com&#x2F;settings&#x2F;security&#x2F;activity" rel="nofollow">https:&#x2F;&#x2F;security.google.com&#x2F;settings&#x2F;security&#x2F;activity</a><p><pre><code>  1. Open Chrome incognito window
  2. Open devtools
  3. Toggle device mode to iPhone (or whatever)
  4. http:&#x2F;&#x2F;google.com
  5. Log in
</code></pre>
Now go back to recently used devices and you should see the new device.<p>Occam&#x27;s razor implies PEBKAC.