Hi All,

I just google a night to allow my N9 use 5Ghz. That's the regulatory domain problem.

The solution was quite easy: just remove /usr/lib/crda/regulatory.bin file. Then my N9 is able to see all the channels available

I switched it to 5Ghz and after executing '/sbin/iwconfig wlan0 power off' the awful delays (ping the device >100ms) gone, and I have ping 1ms, full speed, but probably less battery life, of course.