Good Day,
Please kindly be noted that we have released new firmware version 3.3.0.1 of Vigor2820 series. You could download the formal released firmware from following URL: https://www.draytek.com/support/download/Vigor2820.php.
This version of firmware only modify below issue,
-- Fix the problem that router crashes during booting stage.
If you have further questions, please contact support@corecasys.com