When I came to Fort Benning I bought a brand new wireless router. Halfway through my course I upgraded my iPhone to a Samsung Galaxy (running Android).
And it turns out that the moment I connected my brand new Android phone to my brand new wireless router Google used the GPS feature on my phone to log the physical location of my router.
You can head here http://samy.pl/androidmap/ to see if your location has been compromised.
I guess it is a sad day in the tech world when Microsoft has more respect for user privacy than any other option on the market.
Bottom line, smartphones may be convenient, but you are probably better off with a burner phone.