Hi all, I haven't really followed Tomato firmware in a couple of years because the router and firmware is so stable I have no issues until now. Hardware & Firmware: Router = ASUS RT-N16 Firmware version by filename = tomato-K26USB-1.28.9054MIPSR2-beta-vpn3.6 Kernel and Wireless Drivers from About = Linux kernel 18.104.22.168 and Broadcom Wireless Driver 22.214.171.124 updates Home Setup: Detached house 3 Laptops with built-in wireless 2 Android phones Wireless Settings was: Wireless Mode = Access Point Wireless Network Mode = Auto Radio = Enabled SSID = red Security = WPA Personal (PSK) + AES Channel = 6 - 2.437 GHz Channel Width = 40 MHz --> Required to get the most out of 802.11n speeds up to 300 Mbps Interference Level = Acceptable Everything has been working for months now with no issues. Today all of a sudden the Interference Level went from Acceptable to Severe and disconnected all of my devices. I've tried disabling the wireless and re-enabling it, channel scanned to change channels from 6 to 1 with less interference, rebooted the router, unplugged microwaves, cordless phones (DECT 6.0 and 900 Mhz models only) but nothing worked. Wireless Interference remained at Severe. Temporary fix, I changed the Channel Width from 40 Mhz down to 20 Mhz and Wireless Interference returned to Acceptable. Now all of my devices can reconnect back to the router but at half of the maximum 300 Mbps. My question is why the "sudden" change in Wireless Interference from Acceptable to Severe? I am trying to find a logical explanation / root cause for this change. Then I can try to rectify the problem and restore my Channel Width back to 40 Mhz. Any help is welcome.