Nokia's current-generation of Windows Phone 8 devices have all been given tasty performance and stability updates.

The new download fixes WP8-related auto-brightness issues, which should make for a less drastic brightness shift like the one you see in the Lumia 920.

Not that Windows Phone 8 wasn't snappy enough on the likes of the 920 and its younger brothers, but Nokia promises the download should speed up the phones as well.

READ: Nokia Lumia 620 review

For those who want specifics, the 920 and 820 update is called 1232.5957.1308.00xx. The Lumia 620's update - still to be made available - is called the 1030.6407.1308.00xx, and promises improved touch behaviour and fixes to camera performance, including exposure and flash.

Nokia says it is delivering the updates as we speak and has posted a handy support page which will help you download them.