I've seen a load of threads all over the www and on here about the cause of headaches, dizziness etc and thought it all in the head, but have to say.... After 3 years on the iphone 4, and zero complaints, a few days on the 5S, and I am experiencing head pain and dizziness after talking on the phone. That can't be a coincidence, after I've gone 3 years and not had any pain from the 4. Just wondered how widespread it it, and am seriously considering going back to the pain of the dodgy home button on the 4. The threads all mention it's the noise cancellation that you can turn off. Didn't make a difference for me. Why was it narrowed down to this as opposed to something like a larger magnet or whatever, something else? Anyone have any thoughts on this now and more importantly some help? Was it much talked about with the 5, I've seen a few on here from last year about it, but was it resolved or is this still a problem?