It seems the Lumia 1520 is now getting the Lumia Cyan update en masse in all the regions. On checking in the tracker, Lumia Cyan is marked as available for most of the markets in Europe, APAC and other regions with exception of Latin America. Early today, we reported Germany CV receiving the update.
Lumia 1520 started receiving the Lumia Cyan update some days back, but the release has been staggered rather than en masse as seen in case of Lumia 625, Lumia 925 and recently the Lumia 1320. Even AT&T has become the first US carrier to go ahead with the update for Lumia 1520.
Lumia Cyan brings goodies from both Windows Phone 8.1 and Lumia Cyan Firmware in one. You may like to read some of earlier posts for any help required,
For catching everything about Lumia Cyan and Windows Phone 8.1 which includes:- Full Changelog, Hands-on demo videos, Tips, Tutorial no better place than our dedicated Lumia Cyan and Windows Phone 8.1 page.