I just acquired this tablet and I am in the process of setting it up. It did update a total of 29 apps (so I know the update process is functioning), but it has now been stuck on "Downloading update package" at 0% for the past two days. All other elements of this tablet are working fine.
As the tablet is currently running Android 4.2.2, I suspect this is the update to 4.4. I have switched between wifi and 4GLTE network, rebooted several times, cleared all system cached files, etc., but the download isn't showing any progress. I even did a system reset but eventually got back to the same point: "Downloading update package" stuck on 0%