I recently upgraded from a Nokia Lumia 521 using Walmart Family Mobile to a Nolia Lumia 1320 from Cricket. On the Lumia 521, I ran Windows Phone 8.1 DP since May last year when I got it. Every time I install Windows Phone 8.1 DP on the Lumia 1320, which came with Windows Phone 8.1 and Cyan pre-installed, it repeatedly goes into non-stop crash/restart loops to the point, I have to hook it up to my pc and use the Nokia Recovery Tool to reset the phone. Has anyone found a workaround for this ? I'm already signed up for Microsoft's Phone Insider Program and really want to try Windows 10 on it next month..