Whilst typing my password in to download an app on my iPhone 5 I noticed a red interference, like you would get on a TV flashing with broken lines accross the keyboard part in portrait mode. It lasted for a few seconds and I was unable to take a screen shot in time. There was no other electrical device around and I've never seen anything like this on any of my previous iPhones. Very worrying. Do you think I should take it to the Apple store and get them to replace it? I bought it via my phone service provider (Orange) so hopefully this shouldn't be a problem. Has anyone else had a similar issue or could this just be an isolated problem?