Yet another source has chimed in, saying that the Apple iPhone 6s will pack a 12MP camera. The info by the way of a Chinese news site quoting Japanese media and claims that the sensor will switch from the traditional RGB sensor design to RGBW.
The White sub-pixel aims to improve the low-light performance of the camera. There's also a suggestion that autofocus speed will be increased without any details on how (phase detection, perhaps?). The sensor will reportedly be made by Sony.
The source pours some cold water on rumors that Apple will switch to a dual-camera system, but the dual-tone flash is here to stay.