@Sunshine Thank you, it really helps me a lot，and makes me feel not really anxiety. I will buy another one when it is possible.

@Sunshine Also,I have another question. If I buy a Deco be85 in US. Can these (1 US+ 2 JP)three unit build a mesh net? If they can, which power limit will they work in? or they work in different...

@Sunshine OK, I understand it totally. So it needs to me directly buy the US version if I need to use US version. fine.otherwise,why some region do not allow user to manually decide which band to...

@Sunshine Hi sunshine Thank you for replying me and giving useful advice. However,I mean technically, if I try to find some difference between different location versions disconsidering the warranty....

I bought two deco be85 in Japan and take them home in China mainland and I found it seems a little bit weak signal to cover my house with two kits. So I think if I can flash a US firmware in the...