Just an FYI for those of you who jumped on the Windows Phone Developer bandwagon and subscribed to the Windows Phone Developer Preview to get an early look at 8.1. This is not such good news.
As is the case with all Microsoft Beta and Pre Release Software (Windows, Office, Windows Phone, etc.), there is a strong chance that the final cut of the software may not be compatible with the Beta or Pre Release versions of the application you are invited to download and sample. Based on the article below and based on the AT&T customer experiences, this, in fact, is the case with the WP Developer Preview of 8.1.
The Cyan 8.1 release provided to the carriers looks to see if you have DP 8.1 running and cancels the install if you do. Microsoft has not said when a compatible version would be available through the Developer Program or with US carriers.
There are directions on how to restore back to WP 8.0 if that is something you have to do. Or, skip the Verizon update, keep DP 8.1 and wait for Microsoft to release an update. Many are skeptical that Microsoft will do this; many are saying that the next Developer Preview will be WP 9.0. Regardless - the only way you will be able to install the Verizon version of Cyan 8.1 will be on a supported WP device running WP 8.0. There are many more details in the article below and the comments at the end of the article are filled with interesting information as well.
http://www.wpcentral.com/preview-developers-still-need-downgrade-lumia-cyan