I got the mi box 4 from China. Don't suppose it's useful?
Realised only after I got it.
It can't detect my 5ghz signal and of course it's in Chinese. No international rom available for flash I suppose?
If I'm not wrong,
Mi Box 4 for China market --
don't support 5Ghz WiFi, only supports 2.4Ghz WiFi.
There are 2 models of Mi Box 4 for China market:
(1) MDZ-20-AA: 1GB+8GB (Black, Mi Box 4C)
(2) MDZ-21-AA: 2GB+8GB (White, Mi Box 4)
If you're using either model above, I think don't bother changing 5Ghz WiFi channel on your router -- both models don't support 5Ghz WiFi at all.
You can check the specs for above models of Mi Box 4 for China market on Xiaomi Website at this link:
https://www.mi.com/mibox4/specs/
You can also check specs for previous Mi Box 3 series models for China market on Xiaomi Website at this link:
https://www.mi.com/hezi3/specs/
As you can see from above 2 links --
under the item 'WIFI':
For Mi Box 3 series -- stated as "双频 2.4GHz/5GHz,802.11a/b/g/n/ac" (so 5Ghz WiFi is supported)
For Mi Box 4 series -- stated ONLY as "802.11b/g/n、2.4GHz" (
so 5Ghz WiFi is NOT SUPPORTED)
If you wanted to use 5Ghz WiFi, then you should have easily checked Mi Box 4 specs using the above link BEFORE buying.
I think people just assume that all models of Mi Box 4 series support 5Ghz WiFi -- because (previous) models of Mi Box 3 series for China market all supported 5Ghz WiFi.
Don't ask me -- why previous models of Mi Box 3 series for China market all support 5Ghz WiFi -- yet newer Mi Box 4 series for China market don't support 5Ghz WiFi.
I don't know why -- go ask Xiaomi
Of course above are just Mi Box models for China market.
There are also Mi Box models for overseas market -- which many people in this thread are using:
MDZ-16-AB: Mi Box 3 International Edition, 2GB+8GB, upgradeable to Android TV OS 8.0
MDZ-22-AB: Mi Box S, 2GB+8GB, Android TV OS 8.1 (which logically speaking, is Mi Box 4 international edition)
You can check specs for MDZ-16-AB at this link:
https://www.mi.com/global/mibox/
You can check specs for MDZ-22-AB at this link:
https://www.mi.com/us/mi-box-s/specs/
Yes,
both MDZ-16-AB & MDZ-22-AB support 5Ghz WiFi