Nokia Lumia 510 Goes Official with Windows Phone 7.5

It will be available “soon” for under Rs 11000 (205 USD or 155 EUR)
by Cosmin Vasile, October 23rd, 2012
 

Alleged Nokia Lumia 510 Emerges in China

It should arrive as a low-entry, cheap Windows Phone 7.8 smartphone
by Ionut Arghire, September 21st, 2012
 

Nokia RDA Unveils More Windows Phone Smartphones

Lumia 920, Lumia 950, Lumia 510 could all arrive on shelves with Windows Phone 8
by Ionut Arghire, July 9th, 2012