Update: Never mind the leaks, the real deal is out. It has a bigger than expected 6" screen with the amazing QHD resolution (sometimes called 2K, but either way both refer to 2,560 x 1,440). That gives it a whopping 490ppi pixel density, higher than even the 4.7" 1080p screen of the HTC One despite the sizable difference in the diagonal.
The Vivo Xplay 3S is powered by a Snapdragon 800 chipset - quad-core Krait 400 CPU at 2.3GHz, Adreno 330 GPU and 3GB of RAM. On the connectivity side there's both TD-LTE and FDD-LTE.
The camera (rumors had little to say about it) is a 13MP shooter with a fast f/1.8 aperture. Next to it is a fingerprint scanner and there's a 5MP camera on the front. Vivo has created a custom camera app called Photo+, which shares your videos to the cloud and features augmented reality.
Chinese etailer Tmall will start taking pre-orders for the Vivo Xplay 3S soon at a price of CNY 3,498 ($580).