Nokia today introduced the Nokia Lumia 630 and Lumia 635 budget smartphones. The Lumia 630 is a 3G device in single- and dual-SIM varieties, while the Lumia 635 packs dual SIMs and supports LTE. Both include a 1.2GHz quad-core processors, 4.5-inch displays, and Windows Phone 8.1.

With dual SIM cards, the Lumia 635 can have different contacts assigned to call through different SIM cards, and even have apps assigned to each SIM card. Color coding is built in throughout the OS to indicate which SIM would be use. The single-SIM Lumia 630 is expected to be available around the globe in May for $159, while the dual-SIM LTE Lumia 630 will retail for $189 off contract.

Both phones take advantage of new features in Windows Phone 8.1, including the addition of on screen buttons and Action Center. They also include SensorCore low-power sensor data collection for real time motion monitoring.

The Lumia 630 and 635 come in a variety of colors, with the 630 getting a matte finish while the 635 goes high gloss with "a unique dual-layered, luminous tonal surround that glimmers and glows".