I used to have a 3gs phone which I had JB with jailbreakme.com. Over Christmas I had to upgrade to a iPhone 4.0. Yesterday I backed up my phone to my iTunes account and then downloaded Redsnow and tried to begin this method of jail breaking. I located my ipsw and pointed redsnow to it but redsnow was telling me I had a 3gs still. I am using IOS 4.2. Snow leopard 10.6.6 and iTunes 10.1. My Ipsw shows that it was last updated in November which of course was when I had my 3gs. In iTunes I've updated my phone and it shows that it is up to date. Why doesn't my ipsw then show up as correct for my phone? This method is new to me and apologize for the newbie questions. I tried to search the web, but apparently I'm not down with the right lingo.