This is interesting story about problem I was able to solve and how correlation does not always imply causation.

Ok, sometime ago my wife dropped her iPhone and broke screen. Initially I thought to repair it via 3rd party service but at the end I went to Apple and for $120 they did replace screen. And as story unfold you will see that it was totally worth it.

Few days later after Apple fixed screen (and it took only one hour) my wife started to complain that phone is started to freeze for few seconds. And after few days it became quite bad. So, I did backup phone and my wife went to Apple and they simply replace phone to