Was just going to post a similar thread when I saw this. For a while I'd had a couple of tiny bubbles under the glass on my first gen iPhone and I took it into the Meadowhall shop on the offchance that they'd do something about it. The chap said he'd not seen anything like it before, but swapped it for a replacement (presumably a refurb) there and then. Unfortunately, the wi-fi was broken on the replacement, but I again had that swapped the following day. Very happy with the service, even though the warranty was showing as having expired on my original phone (I jailbroke it initially so never registered with apple - I'd had the phone 11 months but it was showing as 14 months old on their system, presumably when it was sent to o2). Even before I told them I'd only had it 11 months, the guy had agreed to swap it, commenting 'it's obvious you've looked after the phone'. Good advert for keeping stuff in good condition I guess.