I was puzzled by the sudden disappearance of the camera in IPhone 5, it happened on the tenth day of its brilliant performance,
my theory is the camera was playing hide and seek, but I could not find it out, neither could the technicians of Apple studio,
with their help to re-download, I finally solved the problem, and I had to input utility programmes ..., the address book is still vacant.
I did not remember my private number of hand and house phone, even home address unless I had lived there at least ten years.

I appreciate Ken reminded me of the wrong month "10th Dec., 2013, I have corrected it.