It is slightly different for the Note 10.1
The file you need to modify in /etc/wifi is nvram_net.txt_murata
I found out this is also a problem with my Note 10.1.
If I set the 5GHz band to be in the 5.4GHz channels, the Note 10.1 can see the 5GHz WiFi, but if I set it to channels above 5.7GHz or Auto, it will not see the 5GHz WiFi.
Anyone have some...