Always a possibility, but I'm not convinced. My phone didn't come from a particular network so there is no operator customisations that might be spying on me, and I'm not so sure Google is going to spy on me even if I say no when the phone asks. Third-party applications could do so; but it tends to be well publicised when an app is doing something it shouldn't, and besides, if you're paranoid, you can check the capabilities that the app is asking for when you download it. I don't think the App Store does that.
Guess I was right after all : http://thenextweb.com/google/2011/0...iphone-android-stores-your-location-data-too/