AT&T (T) customers who own the Nokia (NOK) Lumia 920 or the Lumia 820 are getting an early Christmas present this week. Nokia and Microsoft (MSFT) on Wednesday started rolling out a significant over-the-air update to both Lumia models on the AT&T network that will boost Bluetooth reliability and connectivity, add enhancements to Nokia Messaging, improve start-up performance and enhance the devices’ battery management. Nokia says that this update is only available to customers of AT&T and Canadian wireless carrier Rogers so far, but adds that it is “working with our operator partners in all regions to ensure the highest quality experience in every market” and that it is “working closely with Microsoft… to deliver these updates to other markets in early February 2013.”

Prior to joining BGR as News Editor, Brad Reed spent five years covering the wireless industry for Network World. His first smartphone was a BlackBerry but he has since become a loyal Android user.