Flashed it, no difference... The Mix still only sees access points announcing 5GHz.
Thanks for your support
@cobben, you're right!
I've found the cause of the problem:
Channel 13 of 2.4GHz isn't apparently supported by this new stable ROM (while it definitely was with previous version 10.1.1)
As luck goes, my 2.4/5 GHz access point was set - hell, forced - to channel 13 for the lower band
As soon as I've switched to another channel, the Mix was able again to see the 2.4GHz band.
Thanks everyone for your time
That's why I'm surprised. We force UK/GB for WiFi region for those in the EU region, but even with region set to IT for the OP, he can't see channel 13 for some reason.I have a problem with my Max1 Prime, which for now cannot see Chanel 13.
It used to be able to, and on the same rom.
Have no idea what happened.
Chanel 13 is not allowed in the US, but is in Europe, so it is a little special apparently.
That's why I'm surprised. We force UK/GB for WiFi region for those in the EU region, but even with region set to IT for the OP, he can't see channel 13 for some reason.
... then you should have said so from the start.I just tested on my Max1 helium EU 9.1.3, and it cannot see channels 12 and 13, 2.4Ghz wifi, when there is no simcard.
It can see channel 12 and 13 with a simcard, roaming or not roaming.
Everything else seems to work normally, all other channels 2.4Ghz wifi, and 5Ghz wifi.
... then you should have said so from the start.
If no SIM Card is in the device, Wi-Fi region will be set to the region set by your display language.
If you're using "English (United States)" - no channel 12 and 13 for you. If you use "English (United Kingdom)" you will see both channels.
(You need to reboot after changing language for the Wi-Fi region to take effect)
In official ROM, if you don't put a SIM in, the Wi-Fi region is set to nothing, and then you will not see 5GHz networks at all, and that was a serious issue for Mi Pad 4 (Wi-Fi only) users.I had no idea from the start that the wifi problem could be related to the SIM cards or system language.
Now that I know, it is not a problem.
Thanks for the explanation, the language discrimination is quite fascinating.
I of course as an expat American automatically choose US English over that decadent version still spoken on those dirt poor islands off the coast off Scandinavia.
@TakoMix , are you using the phone with no simcard at all in it, by chance?
... then you should have said so from the start.
If no SIM Card is in the device, Wi-Fi region will be set to the region set by your display language.
If you're using "English (United States)" - no channel 12 and 13 for you. If you use "English (United Kingdom)" you will see both channels.
(You need to reboot after changing language for the Wi-Fi region to take effect)
(...)I of course as an expat American automatically choose US English over that decadent version still spoken on those dirt poor islands off the coast off Scandinavia.
In official ROM, if you don't put a SIM in, the Wi-Fi region is set to nothing, and then you will not see 5GHz networks at all, and that was a serious issue for Mi Pad 4 (Wi-Fi only) users.
Wi-Fi has different regulations. How do you think the appropriate regulation is being set? By your SIM card region.
We extended this to default to system language region in case there is no SIM inside, to allow using 5GHz.
Now you've got me thinking.. why on earth do I choose US English as the system language for all my devices...
In official ROM, if you don't put a SIM in, the Wi-Fi region is set to nothing, and then you will not see 5GHz networks at all, and that was a serious issue for Mi Pad 4 (Wi-Fi only) users.
Wi-Fi has different regulations. How do you think the appropriate regulation is being set? By your SIM card region.
We extended this to default to system language region in case there is no SIM insideGhz , to allow using 5GHz.
adb logcat -s wpa_supplicant
Do a logcat while switching Wi-Fi on and off multiple times.
Code:adb logcat -s wpa_supplicant
Yes, this is how I designed it to work, and sounds like Mi Max (which is Android 7.0) is having difficulty behaving like Mi MIX and Mi Note 2 (both Android 8.0).I'll have to wait to tonight to do the ADB thing.
I just did an experiment on my Mi Note 2 scorpio running EU 9.1.17.
System language US English, wifi region 'GB' .
I turned off "Mobile radio power" with a toggle in the app NetMonster, without removing
the simcard.
After then toggling wifi off and on again, channel 13 disappeared.
When I turned on "Mobile radio power" again, and toggled wifi off and on again, channel 13 reappeared.
No rebooting was necessary.
Addendum:
I changed system language to UK English and tried the same experiment, and channel 13 never disappeared.
No reboot necessary.
This is how it should work, with the current implementation, yes?
So this bug seems limited to the Max1.
Adendum2:
Same result on the Mix1 lithium as on the Note 2 - switching to UK English keeps channel 13 available with "no simcard".
Will try the Max1 tonight.
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