accidental upgrade to iOS 4.0.x - need to rejailbreak
I have an Iphone 3G from UK 02 and got it jailbroken by someone. Today I accidently updated it
using the automatic update tool in itunes and now it's been locked. The following is a screenshot
of what I am faced with.
I then tried to jailbreak and
unlock it myself using the guide at Jailbreak iPhone 3G on iOS 4 With RedSn0w but I am stuck
in step 3 where I have to "update" my iphone from 4.1 to 4.0.
I downloaded the ipsw file but I don't know how to install it on the iphone.
Any help and advice would be much appreciated. (I'm using a macbook for your kind reference).