I tried to update automatically before. Then it become brick. It was just trying to boot but after a few minute reset with boo---p. After long time trying to contact seller, I found this forum. Then I re-installed 1480 and working fine. Then I tried update.zip for 1623 and had same problem of booting. Anyone saw same problem? Good news is I can always reinstall 1480 bad news is no updte.