Pustiu314p - March 4, 2013 at 12:34pm
Shure you can, make with redsn0w a dfu ipsw for your 4.1 version, after that make with redsnow a custom ipsw with no BB, after that with itunes restore to DFU ipsw, it will give you a error like 21 or something that but your iphone it will be in DFU mode. Now you can to restore to last version of IOS with no BB ;)