@Shanu00 Upgrade the device FW to the latest version described in this thread. Watch for the correct FW region, whether US or EU. For EU FW only a beta version is available, but you can use it...

@-Nono- Check out this story - it's about Synology FTP server, but for QNAP FTP server should be similar. If you have an ISP modem/router before the AX11000 you can: 1. Set a DMZ on that ISP device...

@joxojexojaxo If you're using the device in AP mode set LAN IP address as follows: and the DHCP server to Auto: Then check if the wired/wireless clients number is correct.

@Ashnique If you live in a dense rural area, it's quite possible that this is the cause for your issue - wireless interference. Here are some good articles on how to select the best wireless channel...

@Skma376 That's the reason for not seeing the 5GHz band. Did you update the device FW recently ? Have you changed any regional settings on the device ? What's the FW region of your device ? - here's...

@Skma376 Make sure that your 5GHz radio is enabled and visible: Make a backup of the router configuration. After making these settings If you still can't see your 5GHz band then hard reset (method 1)...