"They have been crucial for Nokia. The feedback we have, definitely in Europe, is that the Lumia 520 and 625 are driving much of the volume," Cozza said.
It is easier for Nokia to compete in this segment of the market, where brand and app availability aren't as important, according to Cozza. To help keep up its current momentum, Nokia will launch an updated version of the 520, called Lumia 525, as well another smartphone with a big screen, but with simpler specs than the Lumia 1520, according to rumors.
If all that wasn't enough, Nokia has previously said the company would strengthen the Asha family of advanced feature phones. In May, the company launched the Asha 501. It came with a new user interface that is now expected to make its way to more products.
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