TUAW How To: Downgrading your 3.1.3 iPhone to 3.1.2
February 9th, 2010 link to (permalink)
Filed under: AppleLast week I downloaded (but did not install) the iPhone OS 3.1.3 firmware for my 3GS. I wanted to have a copy of the firmware on hand, but didn't want to upgrade right away. I checked "Do not ask me again" and clicked Download Only. I thought that was the end of the matter.
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