my iphone 3g was on firmware 4.2.1. I found whited00r and decided to install the iOS 4 version and everything went smoothly. I then decided i didnt like how slow my phone was and downgraded it to 3.1.2, used iReb to put it into a recovery state and installed whited00r 3.1.3.
The installation went sucessfully, but now when i insert my sim card it constantly says searching... where my carrier should be.
is this a problem when downgrading or can it be fixed?