AirCube AC connection to UFB Procedure

You need to start on firmware version 2.8+ to do this step upgrade firmware to minimum 2.8.8 or above. E.g 2.6>2.7, then 2.7>2.8.0, then 2.8.0>latest 2.8.8 (or above). Firmware files are available at https://www.ui.com/download/software/acb-ac

Once on latest 2.8.x go to Network settings and enable Data VLAN (usually VLAN = 10) 

Save and then go to basic settings to enter your PPPoE settings or choose DHCP (depending on your ISP requirement)

Save and apply, then go to the dashboard and confirm you are connected to Internet