When I bought Unielec u7621 router, I thought buying something that has usb3.0 support would be better. Unfortunately I wasn't aware of the usb3.0 interference with wifi 2.4ghz band.
No matter i plug in to the usb3.0 port, my 2.4ghz wifi always goes crazy.
I tried usb2.0 devices, I tried removing kmod-usb3 package but no luck.
Last thing I didn't try was disabling usb3.0 in the driver which was explained here
disable the USB3 driver to force fallback to USB2.0. Many current LEDE devices aren't even noticably faster on USB3.0 data transfers compared to 2.0.
I don't know how to do it. Any help?