Nokia Lumia 710 is mid-range Windows Phone smartphone, which has a 3.7-inch touchscreen, 1.4GHz processor and a 5-megapixel rear camera. It runs on Windows Phone 7.5 and is expected to get an update to Windows Phone 7.8 soon.
According to WPDang, Nokia Lumia 830 too is expected to be a mid-range smartphone running on Windows Phone 8. It is expected to be cheaper than the recently showcased Nokia Lumia 820. The only information available with the website right now is that Nokia Lumia 830 will be available in five colour options - black, white, red, yellow and green. It did not post any hardware specifications or availability details. The pictures themselves show a smartphone that looks very similar to the Nokia Lumia 820.
Nokia had showcased Nokia Lumia 820 and Lumia 920 smartphones in September 2012. Nokia Lumia 920 is its flagship smartphone and Nokia Lumia 820 is a mid-range offering and both are expected to be available in India this month.
Nokia had recently launched the "cheapest Lumia device in the world", Nokia Lumia 510, which is now available Rs. 9,999 online. The Nokia Lumia 510 sports a 4-inch WVGA (800X480) display with a 5-megapixel rear camera and runs on Windows Phone 7.5. The phone is powered by a 800MHz Qualcomm processor and ships with 256MB RAM and 4GB internal storage.