I bought an iPhone last Tuesday and straight away noticed a small 0.5cm rainbow coloured blemish on the screen but only when there is light colours on the screen. I wanted an iPhone so badly and waited ages to get one so I was reluctant to take it back... every time i look at the screen all I notice is this blemish. Do you think I'd be able to take it back to the Apple shop and swap it for a perfect one?

Hi they will check it and I am sure they will change if there is a problem.

They will check and if its an obvious problem they will replace it free of charge under warranty. Just pop into an Apple Store.

Don't just pop in, you'll need to make a genius bar appointment. 'Geniuses' are the only people able to make warranty replacements. They're likely to be fully booked for the day unless you go in early and even then you'll probably have to book one for later in the day.

It's simple to book online.