Guys, I have a black AT&T iPhone 4 but now I am in UK for a business trip. My volume buttons are not working since 2 weeks now. If I go to Apple Store in London, will they replace it with the factory unlocked iPhone 4? Because obviously they don't sell AT&T iPhone 4 here in the UK and they don;t have any replacement in stock? I've been wanting to replace my phone back in the States but I might try my chances while I'm here in the UK. What do you guys think? What phone will I get as a replacement if I try to talk with the Genius here at the Apple Store UK? Thanks and I appreciate any input.