I wanted to flash it back to Tango (8773).
So I downloaded the firmware with data package manager, Started the product support tool, and followed these steps: open product->RM-801->programming->recovery->hold vol+ button and plug USB cable then click retry
But then NCS wont flash the device (it shows the retry dialog again) and my PC pops up a dialog says I have to format the disk before I can use it; and there is such a "Qualcomm CDMA Technologies MSM" mass storage device in my computer.
I'm using NCS 5.2.
What should I do now?