I already try to disable 2.4Ghz. Still some device from other country cannot see the 5ghz network. Is there anyway to make deco to support 5Ghz band for all channel? Regardless country? Coz my guest...

It looks like my Deco M5 5Ghz band only can be seen from the same region device. I buy Deco from Singapore, all device from Singapore can see and connect to my deco M5. But all my device from...