We may well have seen the next iPhone's back shell, front panel, SIM tray and even its cabling. Why not round it out with what might be the motherboard? A WeiPhone forum goer who slipped out the iPhone 4S' board last year is back with the 2012 update's potential new heart. While the tipster hasn't been courteous enough to do a side-by-side with the older component, repair shop iDeviceGuys notes to 9to5 Mac that the newer part isn't just a carbon copy; that smaller SIM slot (what you see in the middle) is one of the bigger giveaways. The real treat may be the extra wireless antenna connections. They aren't any surefire signs of 4G, but the antenna links suggest Apple isn't content with what the iPhone 4S has to offer. We're mostly left wondering about what's under that shielding -- it's a mystery as to whether or not the next iPhone's processor speed bump is a mountain or a molehill. Barring one more peek, we could get the full scoop next month.