Google only mines the data you allow it to mine. Exactly like Microsoft. If you think a Windows phone will mine less data than an Android, you're dead wrong. At any rate, there's a considerable difference between a Nexus and a BlackBerry with Android. BlackBerry changed the OS to make it "more secure" which means your privacy will be bigger there than on any other Android phone (hence the name "Priv"). IF you want to use apps like Gmail, Google Search etc, then of course Google will get data from you. Just like Microsoft gets when you use Outlook or Bing. But you're not forced to use those services.