What does UDC start stand for on my Note4?

I'm trying to recover the use of my Verizon Note 4 after I turned it off during a system upgrade and did a factory est. I'm using Smart Switch on my pc to do this and in upper RH corner it says UDC start in red. What does that mean

from Android Forums at AndroidCentral.com - Ask a Question https://ift.tt/2N7KQct
via IFTTT