Microsoft have begun pushing put the big Windows Phone 8.1 update dubbed Cyan to Nokia Lumia devices. The update won’t hit all Lumia devices at the same time, but should reach them all in the coming weeks. The new update allows for 4 column tiles instead of the previous three, more customization, gesture keyboard, better Bluetooth LE support. Certain devices will also receive Dolby Digital 5.1 sound, Nokia Rich Recording and camera updates as well.
Update page: Nokia.com