It’s iOS 4.0 day today as I’m typing this blog. If you’re on an official iPhone OS 3.1.3 firmware, all you need to do to get iOS 4.0 loaded is to just wait for iTunes to prompt for the a new iPhone software update and just update it. If you can’t wait for the auto-checking, just click the Check for update button on iTunes over the next few hours.

But what if you’re currently have a jailbroken iPhone 3GS. Specifically, an iPhone 3GS on More >