I have an iPhone 4 (AT&T) with the exact same issue for 3 months i.e. a Gevey Tray stuck inside my phone and I couldn't remove it. I tried everything I can possibly try including unassembling the whole iPhone with no luck. I've already given up but I tried with a screw as Ron suggested above and it came out as easy as it seems! I unscrewed a small screw from my TV remote and it worked perfectly. Good luck to those who's still having an issue with it!