On iPhones it's not possible. I suspect that any Androids approved by Google (which they need to be to have the play store preinstalled) aren't allowed to mess

On iPhones it's not possible. I suspect that any Androids approved by Google (which they need to be to have the play store preinstalled) aren't allowed to mess with the data collection, but the agreements aren't public so I don't know for sure. (I think one was leaked in the Oracle lawsuit or something?)