Information regarding the Nokia Lumia 720 and 520 smartphones were recently leaked out before Mobile World Congress event, which is due later in the month.

Nokia Lumia 520

The two devices recently passed certification from Directorate Post & Telecommunication India. Their equivalent of the FCC. The Lumia 720 is expected to be the successor to Lumia 710, and the Lumia 520 is expected to be the equivalent of the Lumia 510.

Unfortunately, there is not a lot of information regarding the new devices, although it’s predicted they will just be minor to moderate upgrades of the previous generations. revealed some reported specifications from an unnamed source. It reported that Nokia 520 would feature a four-inch Super Sensitive touch screen, 1GHz dual-core processor, 512MB of memory, 8GB of storage, microSD card slot, and 5 megapixel camera in the back. The Nokia 720 reportedly features a 4-inch screen with ClearBlack Display, 1GHz dual-core chip, 512MB of memory, 8GB of storage, microSD card slot, 6MP camera in the back, and 2MP camera in the front.

These specifications are just rumors and nothing has been confirmed yet, although Nokia should introduce these two new devices at the Mobile World Congress event at the end of February.

These smartphones were also included in the regulatory filing in Indonesia.

Nokia Corporation (NYSE:NOK) (BIT:NOK1V) (HEL:NOK1V) is still struggling to stay relevant in the market and it’s hard to predict what will happen to them in the near future. The rumored devices mentioned above most likely won’t garner enough interest to save the company, although it’s possible the upgrades might keep them around a little bit longer. According to ZDNet, Nokia Corporation (NYSE:NOK) (BIT:NOK1V) (HEL:NOK1V) sales remain stationary for now. Just this last quarter, it sold 4.4 million Lumia smartphones, which is quite an improvement from 2012’s second quarter sales of 4 million and third quarter sales of 2.9 million.