I updated my iPhone 3GS to iOS 5 and All I get is No Service, No Wi-fi and Bluetooth unavailable. I brought it to an Apple Genius, not in the Apple Store or an Apple Authorized Repair and he said he has to downgrade to iOS 4 because of the Quad band thing-y. He said something about iOS 5 not recognizing the Quad band and it's on a outdated version that's why iOS 5 didn't detect it. Whatever he just said, was it real? Can it really happen?