I vaguely recall that there was once speculation that certain production batches of iPhone 3Gs contained an "immature 3G chipset" that caused bad reception issues. I don't recall whether this turned out to be true or just idle speculation. Were the reception issues actually taken care of in the 2.2 software update? I am purchasing an iPhone 3G off of Ebay, and the seller purchased the phone in September 2008. Obviously, this doesn't in and of itself tell you anything about the production batch that it was in, but I wanted to check-in to confirm that there are no known issues with certain iPhone production batches. Thanks.