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Linksys WRT 3200ACM 160Mhz 

You have to find out the channel that in your country was setup with the router is working. For me, I am Hungarian, but the router is FR based in FRANCE in EUROPE (or European Linksys is usually is FR), the 100, 120 channel is working well, I think upwards channels 100.

But for now, it is using the radar detection and it is changing the channels and it works.

Check status 

iw reg get
iw dev

Picture 

Though I set 160Mhz, but my clients only know 80Mhz right now, but with the settings, it still works, so 160Mhz is working:

Linksys-3200ACM-160Mhz Linksys-3200ACM-160Mhz

This is important 

http://192.168.1.1/cgi-bin/luci/admin/network/wireless/radio0.network1

Below: Wireless scurity set Cipher to Force CCMP (AES).

reboot && exit

or just Save and Apply in LUCI.

More info 

https://github.com/kaloz/mwlwifi/blob/417c15f2af00920945882a1b82ab1f5785a7b7b0/README.md#note-for-dfs-of-wrt3200acm-88w8964

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