I will never use them again! I went into a store earlier today to enquire about an early upgrade to the Samsung s6. I currently have an iPhone 6 that I purchased from apple which I just put my paym sim into. I asked what carphonewarehouse would give me for my iPhone 6. The store assistant took my iPhone to check it then asked if it was a Uk model to which I confirmed it was. He responded saying no it wasn't. Gave me the phone back and walked off. I was left stood there feeling a tit. The fact I bought the phone so I know it's a UK model. The fact I checked with apple afterwards just to confirm any confusion with the matter who said yes it is a UK model! Disgusting service and I will never step foot in any of their stores again! Very angry experience! Treated like I was trying to con them out of money