On Saturday, a render of the unannounced Nokia Lumia 830 came out of Italy by way of China, showing the aforementioned "Nokia by Microsoft" labeling of the device. This is the time where you need to grab that carton of salt, because you need to take this story with a grain of the stuff. By the way, a leaked photo of the Nokia Lumia 830 that made the rounds on Thursday, did not have any branding on it.
Some specs also have been leaked for the Lumia 830, focusing on the rear-facing camera. The snapper that graces the back of the handset is expected to be a 13MP PureView camera with a lens made by Zeiss. The screen is believed to be 4.5 inches
The "Nokia by Microsoft" branding would seem to fit exactly what is going on here, especially since Microsoft has licensed the Nokia name for as long as 10 years. But the question now is whether the image below is genuine
source: Baidu, WindowsBlogItalia (translated) via WMPoweruser