The procedure is very much the same like all other videos BUT it has a one added solution which is not mentioned in the entire YOUTUBE! which is why people are still getting errors like 3194, 1015 and etc when they try to restore, downgrade any of their iDevices! this will work 1000% on all idevices!
this video has a one unlocking method which most of us never thought of!! to fix those errors which occurs while restoring and updating!
and this will work 1000% on all idevices!
i was updating my iphone 3gs on 6.1.3 but keep getting this shity error! finally found a way myself to overcome it!