@HomeNotifier Look at the bottom sticker of the device to find its HW version. According to that HW version you could see which is the latest FW release for the device.

@RehoDesign Have you tried to change the IPv6 Mode from "Router" to "Pass-Through(Bridge)" and check if there's any difference ?

@Daniyar If you're using L2TP for Internet connection type, probably sharing this issue with your ISP would be most helpful.

@myke52 Look at the bottom sticker of your AX73. Your device region is most probably "EU" and that's the reason for missing Band4: 149-165 (149,153,158,161,165) channels - to comply with CE...

@Arejoe To extend your wireless coverage in your premises just set the second AX80 in AP mode (Case 1) and set its wireless SSID the same as the first AX80. Thus you'll not introduce a double NAT in...

@Daniyar This could be due to an ISP DNS issue. Try the following: Use 1.1.1.1 and 8.8.8.8 for primary and secondary DNS.