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Message: <blockquote data-quote="Gaby" data-source="post: 2298231" data-attributes="member: 220947"><p>okay yesterday i upgraded my jailbroken iphone to 3.1.3 firmware and now my iphone just shows a usb cable pointing to itunes and when i had hooked it up to itunes it says the sim card in this phone is not supported.I looked up on the internet on how to downgrade i tried to do it but it doesnt want to work also my iphone is jailbroken to tmobile and idk how to downgrade because i think that is what it needs how can i fix it?</p></blockquote><p></p>