My 3Gs which had been sitting around as a backup decided to brick. It had been jailbroken with greenPois0n and I 'think' it had 3.0 software on it. When I tried to turn it on, it went to the iTunes connect screen. I can not restore it either in iTunes connect mode or in DFU mode. Does the newer software need a CIM card to resotre a phone? I have been trying without one. It gives me an error 29. What can I try?