An iPhone 5S expected this year will use a quad-core 1.2GHz A7 processor paired with PowerVR's quad-core SGX554MP4 graphics, and 2GB of LPDDR-800 RAM, says a DroidGator source allegedly working for Apple. The person has also supplied a photo of the device's motherboard, and claims that improving Siri will be a major focus of iOS 7. Every iPhone upgrade has been accompanied by a major iOS release.
