No, it’s not exactly a mystery that the world can expect Apple to release the third iteration of its iPhone this Summer. A little hint of confirmation here and there never hurt anyone however, and it looks like Macrumors dug up a nice little morsel present in 2.2.1 and even earlier builds of 2.x firmware. A string of code refers to a new iPhone model, iPhone2,1, and identifies the new handset with product ID 4756 and vendor ID 1452. The current iPhone 3G is referred to as iPhone1,2 in firmware so this is clearly a different beast. Is this really worth mentioning, you might ask? Well, you may recall back in July when mention of a new iPod Touch was discovered in much the same way – that panned out pretty well and you can expect this to do the same. Beyond the mention in Apple’s firmware, an anonymous iPhone developer using PinchMedia to serve ads noticed a new category, iPhone2,1, in a recent report. We expect plenty more light to be shed on Apple’s upcoming third-generation iPhone before its release in June or July, but it’s always nice to be reminded that it’s on the way. Other than copy/paste, what are you guys looking forward to most from a new iPhone? Hit the jump for the PinchMedia chart showing the iPhone2,1 as being among the handsets viewing ads.