Information for customers with Nokia Lumia 820 and 920

A Nokia Lumia Windows Phone 8 software update providing performance enhancements for the Nokia Lumia 820 and Nokia Lumia 920 has started rolling out over the air. Delivery will continue in a phased manner over the coming weeks and is expected to be complete by the end of February. You will receive a notification on your phone when the update is available for you to download.

Edit: projected end date updates, thanks to Kerttu for the revised information.

http://discussions.nokia.com/t5/Software-Updates/Information-for-customers-with-Nokia-Lumia-820-and-920/m-p/1705694#M127519