The iPhone 5 was the first device to feature Apple's A6 processor, a dual-core chip with better performance and battery life than its A5 predecessor. So what's next? The A7, of course. KGI Securities analyst Ming-Chi Kuo claims the iPhone 5S will feature the rumored A7, a quad-core system on a chip (SoC), reports Apple Insider. The blurry image here, purportedly a shot of a leaked iPhone 5S motherboard, was posted recently by Apple news blog iOS Doc. But critics have challenged the pic's veracity, pointing out that the image is suspiciously similar to one from tech teardown site iFixit. Bottom line: Even if the image is bogus, reports of an A7-based iPhone 5S are likely legit.