I've tried everything so far, how do I downgrade 4.2.1 to 3.1.3 or even 4.0.1?
This is embarrassing because I'm tech-savvy and normally know what I'm doing or can figure it out by 10 seconds of googling, but this problem is making me pull my hair out. I've spent half my work day on goolging this or trying to find the right mixture of keywords to search on this forum but so far... nothing. I'm trying to unlock an iPhone 3G and the person who gave it to me to work on accidentally upgraded it to 4.2.1. I can't downgrade in iTunes on either Windows or a MacBook. I keep getting the "incompatible" message or the 3194. I've tried changing the hosts files multiple times to multiple different suggestions but so far nothing.
Does anyone have any advice on this or can you at least point me to a non-iTunes program that can downgrade the OS? I remember seeing one a long time ago but I can't find it on google or here.
Thanks, sorry if this is a simple fix but it's just an auuuugh project for me