Why does location services require Bluetooth?
By requiring location services to access Bluetooth, you ensure that the user understands their location information may leak when they use Bluetooth.
In versions of Android prior to Marshmallow, the user could use Bluetooth without location services enabled, but location information could leak.
Does Bluetooth use location?
A Quartz investigation found that a user can turn Bluetooth off on their smartphone running Google’s Android software, and the phone will continue to use Bluetooth to collect location-related data and transmit that data to Google.
Should location services be on or off?
Our recommendation is to use High accuracy mode when you need location services unless you see a significant loss in battery life. And remember, you can always turn location services Off if you would rather not let apps know where you are, but the apps may not work correctly.
Can my phone be tracked if Location Services is off?
If you leave it on, your phone will triangulate your exact position via GPS, wifi, mobile networks, and other device sensors. Turn it off, and your device will only use GPS to figure out where you are.