I'm having the same issue as a lot of people in this thread. I can never get my 5ghz Band 1 to work! It is always greyed out on the setup page and says I can't use it due to country/region...

I'm having the same exact issue as you. I've tried everything I can think of but still no success and the 5ghz Band 1 is consistently disabled. I tried the latest firmware upgrade, I backed up and...