I have Lumia 520 with cyan+pfd. I am really confused with this denim. Microsoft states that some devices won't get any firmware update with denim, only os update. So for my case firmware version of cyan and denim are both same. As I have latest os update my extras + info should show denim but it shows cyan. After unchecking pfd enrolment in the app the phone shows denim. Is it really a bug or I really have denim. But then it should show denim irrespective of whether one is enrolled in pfd or not. Its really confusing..