Upon downloading WP 8.1 GDR1, it goes through the preparing for installation phase, and then shows the two updates (one being a WP 8.1 update, other one being GDR1), and when I ask it to install them, the phone reboots and even the spinning gears icon is displayed. But the phone restarts after 2-3 minutes telling me the update couldn't be completed because of error 80188308. Any ideas? I am using Lumia 620, WP 8.1 DP + Lumia Black. Have tried downloading 2 times already, same error.