The first ever dual-sim Lumia, Lumia 630 is under intense testing in India. The two dual-sim variants of Lumia 630, RM-977 and RM-978 were found by us in Zauba records. Now, RM-978 has seen lots of travel to India in last few days, as can be seen in the above screenshot.
This is what we know in terms of specs about Lumia 630,
4.5 inch display
Windows Phone 8.1