White spots on iPhone screen
3 months ago, I bought the Apple iPhone 4s via Three UK. It was a brand new contract phone.
About a week ago, the phone developed a bright white spot in the middle of the screen, white is very noticeable.I had not dropped the phone at all. Then, a few days ago, another bigger but not as bright dot appeared on the screen. What is this and how can it be fixed? I believe the iPhone is in its warranty, but I'm not sure what the problem is.
Thanks in advance,
bainb8248
iPhone 4S, iOS 8.1.2, null