Windows Phone users with existing Lumia handsets will begin receiving the Windows Phone 8.1 operating system and the Cyan firmware update starting Tuesday, according to company officials.
Users with brand-new Lumias, such as the Lumia 930 and 630 already have Windows Phone 8.1 and Cyan. But just about every existing Lumia handset will be getting the new operating system and firmware refresh, as will almost all other non-Lumia Windows Phone 8 handsets.
Note that not every Lumia user will get the new operating system and the firmware update on Tuesday. Microsoft execs are still saying that the rollout will be staged and progress "over the coming weeks." Microsoft has built a page that provides the status of the rollout, listed by handset, carrier and geographic region.