title: iOS AdMob ads not showing up unless on Test Device
body: <p>I have followed the tutorial provided by Google here: <a href="https://developers.google.com/mobile-ads-sdk/docs/admob/ios/quick-start" rel="noreferrer">https://developers.google.com/mobile-ads-sdk/docs/admob/ios/quick-start</a> in order to setup admob banner ads.</p>
  
  <p>My code is exactly how it is shown in the guide from the link above, so when I run the app on my test device or simulator a 'Smart Banner' 'Test Ad' appears..however, the second I remove the line of code below no banner appears at all..</p>
  
  <pre><code> request.testDevices = @[ @"70b9ee4e66c8e6fa26cb84def25706d9" ];
  </code></pre>
  
  <p>Also, I've loaded the app on another device and still there is no ad banner appearing, which makes me wonder when I submit the app to the App Store it only makes sense that all my users won't be seeing ads on their devices. Why is this happening? I've been scratching my head on this one! I don't want to submit it for review until I am certain everything is working correctly and I know that ads will appear not only on test devices but when the app goes LIVE as well. Thanks in advance! :)</p>