I think the Cyan firmware would first be available for 1520 before any other phone. This one might just be another one of those firmwares for L1320 stability.
Currently its not available OTA, just checked for updates and it says my phone is up to date.
that's the OTA I had for my phone (Philippines) released this May. It's also the OTA dated March 27/28 for some. it's a firmware update(Nokia),not a OS(Microsoft)
Now since I'm on WP8.1 Dev preview, do I already have this firmware ? Or I would never get it? I'm confused