Cool. Can't wait for your 2.4Ghz speed test once you get your 802.11AX adapter

same here, my guess for avg speed AX 4x4 2.4Ghz probably going to be around 150-300Mbps because of how congested is 2.4Ghz
Did you already choose PPPoE network type setting and enable VLAN?

Try follow Blacktubi setup guide.
https://www.blacktubi.com/unifi/setup-asus-router-for-unifi/

Is you already set it properly, your old router MAC Address might be tagged to your PPPoE acoount, or PPPoE session is stuck, Try plug your old router and disconnect internet via router WebGUI, and test your new router, And it is doesn't work, dont turn on your old router for about one hour and try again. And is that does not work either call TM and ask them to clear MAC Address Tag from your PPPoE account.

This post has been edited by Doraku: Dec 5 2018, 07:43 PM