Images of a Nokia handset have been posted by EVLeaks on its Twitter account. The rumor mills point that the leaked image is of Nokia Asha 504 handset that is still in works. However, no other information about the handset is available right now.
The same images were on the Bing Search for Asha page. The banner images look nothing like Asha 501 smartphone. Rarely does Nokia use place holder images of devices that are different than its existing line-up. 
If the images are really that of the Asha 504, we can expect Nokia to make some announcement later this month at the Mobile World Congress 2014, scheduled on February 26 in Barcelona, Spain.
Nokia currently offering nine handsets under its Asha series in India including the Asha 500, Asha 305, Asha 501, Asha 210, Asha 308, Asha 310, Asha 502, Asha 311, and Asha 503 – all of them are priced between Rs 4,000 to Rs 7,000. Asha 503 is currently the costliest handset in the series.