There is a NYTimes article and podcast about location data privacy out yesterday.
They also give some advice about how to make sure you are not sharing more than you think you are. With some instructions for iOS and Android. Unfortunately, the Android instructions are really focused on Android 9, which many people will not have.
0. Consider giving up and buy an iPhone! I personally buy “fully unlocked iphones” that are refurbished — just make sure it notes it is covered by an Amazon warranty. Apple seems to care more about privacy. They are not an advertising company like Facebook and Google.
1. Make sure you have location sharing and location history turned off in your google account. You can do that via your phone “Settings… Location” or via your google account via the website — https://myaccount.google.com look under “Personal info & privacy … Location sharing” and “Activity controls … Location history”
2. Then, since you probably don’t want to turn off “Location” completely, make sure you have gone thru EVERY app and made sure it is not using location in PERMISSIONS. Here is how to do this in multiple versions of Android.
Best guide I’ve seen for Android 6-9 (Marshmallow, Nougat, Oreo, Pie)
Android 7 (Nougat) — https://www.tomsguide.com/us/manage-app-permissions-in-android-nougat,review-4116.html
Android 8 (Oreo) — http://www.tomsguide.com/faq/id-2316485/enable-google-location-reporting-android.html
To check which version you are running, go to Settings and go to the last item “About Phone” and it should tell you.
3. If there IS an app you want to share your location with (like Google Maps or Waze) make sure to QUIT the app when you are not using it — (Click the SQUARE and swipe right on the app)
4. To see actual location requests — go to “Settings … Location” and you will see a list of “Location Requests”
5. As reported, Google also collects location data, obviously (in google maps, and maybe can in android generally?) and uses it (I suppose for targeting ads) but supposedly doesn’t sell it.