I've had my Model 3 since August and it will not use the Phone Key to unlock the car unless the Phone App is Open, not just in the background. It does not work if the app is running in the background. Therefore Leaving the phone in my pocket and using it to unlock doesn't work, I have to pull out the phone and select the app, select the Model 3 (I also have an S) then wait several seconds. Note this only happens when the car has gone to deep sleep mode in my garage, when I've just driven it, like to the grocery store, it works when I return to the car. iPhone 7+, latest IOS.
What am I missing to make it work without forcing the app to the foreground?
What am I missing to make it work without forcing the app to the foreground?