USG20W-VPN Wifi Still Dropping - Firmware update not working.

Hi all, after trying to use an alternative Wireless Firewall made by another Tiawanese company (Draytek) I went back one last time to the Zyxel USG20W-VPN. When it worked it was great so I thought I'd give it another go now that there has been another firmware release.

Updated the firmware plugged it all back in and waited. Sure enough after a day the Wireless connection dropped again. Even with a fixed channel it was still dropping once a day. We have about 40 Wireless networks around us so I suspect its some kind of contention issue.

Anyway, I had a root around and decided to switch it exclusively to the 5G profile which has a wider range of channels and has a range just fine for the size of our office. Hey Presto - rock solid Wireless and no drop outs. I don't know if that helps anyone else but that was what fixed things for us.