I have a 16GB white iPhone 5 that I purchased in November. My lock button only works if I press it very hard on the left side of the button. If I press on the right side it makes the click but nothing happens. The problem has been getting steadily worse over time. I have heard of other people with the same problem, but I want to get it fixed while the lock button works partially. Would Verizon/Apple replace this under warranty?