[deepak8330]

I am so disappointed on hearing that those who use 8.1 preview for developers have to downgrade to windows 8.0 in order to receive the cyan firmware, but microsoft has never mentioned this issue before, they just said about warranty will be voided, this is not fair microsoft my handset is Lumia 520 India, plz help me!

[David P2]

It's been mentioned a lot recently on here.

Windows Phone 8.1 Preview users still need to downgrade their OS in order to get Lumia Cyan | Windows Phone Central - posted 2 days ago
Microsoft: Windows Phone 8.1 Preview for Developer users should return to normal software before Lumia Cyan | Windows Phone Central - 16th July

And then there's all the forum posts regarding the subject since the issue became known - 10 days so far.

And here's the reason why: BitLocker and Lumia Cyan causing issues for Windows Phones running Preview for Developers | Windows Phone Central

Doesn't matter if you use Bitlocker or not - the Cyan update was blocked for all users running 8.1 Preview until a fix can be found.