I had an iphone 3G, version 2.2 and it was jailbroken and unlocked. However, one day back in August 2010 when I connected the iphone to itunes, got a message that it detected a new upgrade...do you want to upgrade. Well, silly me, accidentally clicked yes and now my iphone doesn't work. I took it to a repair shop and they said the software to have this fixed is still not available. After not having my iphone for almost 6 months, I am starting to miss it. Is there any way to get this iphone fix via jailbroken? When I power the iphone, all I have is the itunes logo and the NO SIM card inserted message. Any suggestions or advice is appreciated.