ok i am helping my buddy out with his iphone, he has a 3gs thats on 3.1.3 I want to restore 3.1.3 so i can jailbreak and unlock it. however as we all know apple wont allow me to restore it because 4.0 is out now. I know there are ways so im wondering if all the awesome people here can help me out with how to do this! and another thing is my aunt has a 3gs that she upgraded to 4.0 on, she got it back in 09 but the serial number is 88001 and it has the mb bootloader. i used snowbreeze to create a custom ipsw but when i try to flash it to the iphone in recovery it just sits there at waiting on iphone to restore, and if i try it in dfu mode it gives me errors. is thier a way i could downgrade this one back to 3.1.3 and then use spirit to jb? Im using win7 64bit, and i also have hackintosh dual booting on it. Its osx 10.6.1 i believe. I downloaded pwnagetool but when i open it and select the firmware it just sits there and spins?