Earlier this week, a user on China's microblogging service Sina Weibo posted a pair of photos showing what many observers have concluded must be the rear shell of the iPhone 5S, despite the user simply commenting "What is this?" alongside the photos. The photos were quickly picked up [Google translation] by Chinese site EXPreview, which paired them with specific claims about the specs of the iPhone 5S, including a graphics upgrade from the triple-core PowerVR SGX543MP3 to the quad-core SGX554MP4 found in the current-generation iPad, an increase in RAM to 2 GB, a 12-megapixel rear camera with dual-LED flash, support for
