Hello, My iphone 4 is great but I have a tiny problem, that worries me and never happened before with my previous iphone 3G. Basically whenever I remove the SIM tray, the iphone takes like 4-5 seconds to "realise" the sim was removed. When I put the sim tray back in, it's worse, because the iPhone won't detect that I put it back in. It can stay for hours (e.g. last night for 8 hours) sitting there with the "No sim" message but the sim tray right in there! The only thing I can do to force the iphone to "see" the sim card is to turn on the airplane mode. Then it detects the new sim almost instantly. I know it's such a tiny thing, and it doesn't affect my every day iphone usage. Am I the only one with an iphone 4 having this kind of behaviour? I'd say it's gotten worse since I updated to the 4.1 GM, so I guess it could be a bug on the baseband firmware (I tried restorign to 4.0.2 and the same behaviour reproduced) What you guys think?