Stephen Elop just unveiled the new Lumia 630 and 635 smartphones. Aiming to become what the Lumia 520/521 meant for Windows Phone 8, they are expected to bring “an uncompromised Microsoft experience and Lumia experience at low price points”. Both feature 4.5-inch ClearBlack displays with FWGA (480x854) resolutions and run on Snapdragon 400 quad-core CPUs. They will be available in five colors with the option of changeable plastic back-panels shells.
How are the two smartphones different? Here's the nitty-gritty: the Lumia 630 is available in 3G single-SIM and 3G dual-SIM variants, which is finally made possible in Windows Phone 8.1. Meanwhile, the Lumia 635 is a single-SIM only, 4G/LTE-connected smartphone.
Microsoft recognizes the importance of dual-SIM functionality for their customers in the developing markets and has given special attention to it. The dual-SIM Lumia 630's home screen is graced by two individual tiles for each SIM card. Each card can be separately assigned to work only with specific contacts, so users can, for example, call their family and friends through one card, and call their business contacts through the other. This way, different contacts categories can be kept in two separate communication zones, so to speak.
The Sensor Core seems like a promising addition
As both the Lumia 630 and 630 sport decent processing power, they will be treated to all upcoming Windows Phone 8.1 features, including Cortana. They also have an unique property - a Sensor Core – which definitely echoes the Moto X's special tricks. The phones have in-built motion and location tracking sensors which, sort of, emulate the functionality of
