Screen Roation Not working In Calendar App

[WPCentral Question]

I bought a Lumia 521 on eBay that is supposedly a full 8.1 update that was done through Microsoft.
Software Windows Phone 8.1
OS Version 8.10.12382.878
Firware revision number 3056.40000.1404.0034
Hardware revision number 1.0.0.0
On Extras page it specifies Lumia Black with a logo next to the wording that looks like an i in the middle of a circle
First Question:
Is there any way of determining if this in fact a full version or a developer's preview??
Second question:
Is there a way of activating the screen roatation for the Calendar?
Calendar rotation is set to On and it seems to work fine for other apps but not for the calendar.
Is there a list of the apps on the 8.1 Developers Preview? I have 2 phones. One has 8.0 and the other has 8.1 The 8.1 is missing apps such as the Panorama. Has it been deleted or relocated?

 

[realwarder]

You have a Developers version of 8.1

Lumia 521 T-Mobile 3056.40000.1404.0034 Available Available Under testing

Availability in North America - Nokia

Will be Cyan not Black when released.

Calendar does not currently rotate. Hopefully an App update will add that feature sometime.

In 8.1 Panorama is a Camera Lens. In Camera, select menu/lenses.

 

[brusbrother]

thanks. now to wait for cyan true release.