The Nokia Lumia 520 was the cheapest and most popular Windows Phone 8 device. However, it is now more than an year old and the likes of Lumia 525 and Lumia 630 have replaced it. Now, Nokia seems to be working on a proper successor to the Lumia 520. An image with a mention of Lumia 530 has leaked online which shows the device placed beside Lumia 930 and Lumia 635.
Of what we can make out from the image, the device will sport a 4.3 inch screen with on-screen navigation buttons and no front-facing camera. I don't know why Nokia isn't providing any real upgrade to its Windows Phone devices. The Lumia 630 which was released recently was even downgraded when compared to its predecessor as it lacked a front-facing camera. Apart from the increased screen real estate, there seems to be no hardware upgrade at all.