@ChrisBS Thank you for your attention the difference of locale. I didn't know it.

@Joseph-TP Thank you for your reading and answering my question. I understood that it's most important setting the router flat and central position of my home. Next, I'm thinking about how to set the...

I've received AX80 just now. I consider about its placement, Vertical or Horizontal for single floor apartment. So, I want to know Anntenas Direction ofAX80. Does anyone know adout it?