I'm selling my old iPhone 4 which is currently on iOS 7.0.4 and I was going to jailbreak it before selling to add a bit of value, however when I connect it to iTunes and click 'restore' it tells me it will also automatically update it to the newest version of iOS - no thanks. So I downloaded the 7.0.4 ipsw and option-clicked the 'restore' button which allowed me to choose which firmware I used during the restore process, but then it throws up another error and doesn't let me do it. Is this the correct/best way to restore without updating? Or am I missing something here??