title: When downloading an app from Google Play, what is the URL the payload is coming from?
body: <p>I'm trying to understand the flow when downloading an app from Google Play Store (GPS from now on)
  I assume that the phone's GPS app browses to something like <a href="https://play.google.com/store/apps/details?id=com.mysms.android.sms" rel="nofollow">https://play.google.com/store/apps/details?id=com.mysms.android.sms</a> (I'm not related to this app in any way), but my question is what happens when the user hits "install" - where is the binary file served from?
  I ran a tcpdump on my phone, but since it's all SSL and I'm not sure what I'm looking for, it's a bit difficult to follow.</p>
  
  <p>Thanks in advance,</p>