Lumia Black update has started rolling out to Lumia 520 and Lumia 720 today and at this rate availability for Lumia 620 may also not be far away. Lumia 925 and Lumia 1020 were the first ones to receive Lumia Black update. Lumia 820, Lumia 920 and Lumia 625 later joined them.
Lumia Black update bundles goodies from both GDR3 OS update and Nokia Firmware update in one. There are some new apps which also become compatible post Lumia Black. One of them is Nokia Storyteller.
Go to Settings—Phone update to check whether it has become available for your phone. Lumia Black brings some cool new features and important under the hood changes for your device. Check the full changelog here. Apart from all the changes listed in the changelog, it also brings “Double tap to wake up” for Lumia 520. This is a pleasant surprise, as earlier it was understood that Lumia 520 won’t get this feature.
You can go to official Lumia Black update page to check about availability of the update for your country. Below is a full video tour of the changes, Lumia Black brings with itself,