The above diagrammatic image matches very well with the screenshots posted by evleaks before for Lumia 630 and reveals its Dual-Sim standing yet again. It will also have a twin brother Lumia 635 which will be a single-sim and 4G device.
Microsoft has confirmed that Dual-Sim support is coming with Windows Phone 8.1 and SDK leaks show us that Dual-Sim Lumias can have single or two separate tiles based on settings. Read the most comprehensive Windows Phone 8.1 changelog, click here.
Thanks Aikon for the tip. Cheers!!