Video shows Nokia Lumia 630 running Windows Phone 8.1
The Nokia Lumia 630 is expected to offer a 4.5 inch screen with resolution of 480 x 800, which results in a pixel density of 207ppi. Under the hood, you should find a 1.7GHz Snapdragon 400 CPU with 1GB of RAM. If you're not impressed with the way the phone looks in the video, keep in mind that it probably is wearing some sort of disguise in the form of a protective case or shell.
In just a few days, we should see the Nokia Lumia 630 and the Nokia Lumia 930 both introduced at BUILD. We were expecting to see Windows Phone 8.1 unveiled, but that has been delayed for a week or two.
source: YouKu, Coolxap.com (translated) via GSMArena