Unlock Channel 149 on WiFi 5.8GHz - Xiaomi Mi Max 2 Questions & Answers

Hello,
I have a Xiaomi Mi Max 2 running MIUI Global 8.5 Stable 8.5.8.0 (NDDMIED). The phone is locked and pretty much stock as I use it exclusively as a ground station device for my drones.
The issue I face is that no matter what region I select on the settings (System & Device > Additional Settings), the phone cannot even detect 5.8GHz access points transmitting on channel 149. On the 5.8GHz band, channel 149 is the lowest recommended by both ETSI and FCC for short-range low-power transmitting devices (such as R/C controllers that expose a WiFi access point in order for a mobile device to connect and provide groundstation features). I know that the 5.8GHz AP of my quadcopter's TX (Walkera AIBAO) works because my OnePlus One (LineageOS 14.1 by the amazing SultanXDA) connects to the controller as normal (in US, China and EU regions set via the WiFi settings on the OPO) but I would like to use the Mi Max 2 due to it's larger screen.
Is it possible - and how - to unlock channel 149 detection from the Mi Max 2, in order to work with my quadcopter TX?
Thank you very much in advance for your help.

Related

[Q] UNII-2 & UNII-2E channels Nexus 6

I regularly setup wifi networks that use all 21 5GHz channels and I need to tune them for phone antennas. I've been trying to find a way to make my Nexus 6 use all the available 5GHz channels but so far I haven't found anything. It currently supports the UNII-1 and UNII-3 bands as well as the ISM channel but the UNII-2 and UNII-2E bands aren't visible to the device. As far as I can tell it isn't a limitation of the hardware but a software choice made by Google because scanning all 21 channels uses up too much battery.
So anyone know how to force the Nexus 6 to see the entire 5GHz band?
I'd be interested in this info also.
Bump.
Gentle bump.
Nexus 6 DFS
Xypher99 said:
Gentle bump.
Click to expand...
Click to collapse
Anone found anything out on this. Google support and Motorola T3 don't even know what channels it should see. I'm baffled and have a phone replacement arriving tomorrow
The best I've found in some really deep support forums is that the hardware "technically" supports it but the hit to battery life when scanning all 21 5GHz channels isn't acceptable. That's why they've disabled it in base android. Someone would have to custom write a driver and it probably would hit battery life in an unacceptable way.
They finally enabled all 5GHz WiFi channels in the latest driver.
You can get it with this kernel: http://forum.xda-developers.com/nex...ernel-leankernel-minimalistic-kernel-t2954316

Mi 9T Pro LTE issue

Hey guys, I have a problem with my device. Whenever I do an LTE speed test using Google, it always selects servers in Antananarivo (Madagascar), even though I'm in Nairobi (Kenya). This issue does not occur when I use WiFi. I also experience a significant latency while using LTE, even though it's fast, which means that my network might be routed to another country. What could be the issue? Ookla's speed test always selects servers in Nairobi though. The issue was present even when my device was brand new. Help

*Fix* Slow WIFI with Bluetooth enabled

Since the Redmi 8 don't have 5ghz Wifi capability we are stuck with 2.4ghz wifi and on my 2 Redmi 8 devices with Bluetooth enabled that kills the speeds to about 5mb. Apperently Bluetooth and 2.4ghz wifi run off same hardware or software and don't appear to play nice together..
I use multiple different wifi connections a day and was a problem for me. Anyway so this was the workaround that fixed the problem for me and my device. Pretty simple and straight forward and suppose it could work on other devices with same issue..
Always only try this at your own risk.. *As Root is Required*
First off: I'm located in Canada, could be different in another region.
I have a unlocked bootloader
latest stable Xiaomi.eu rom for the Redmi 8 installed
Official TWRP installed..
2: *Root Required*
Download and Install latest version of Magisk and flash via TWRP
3: Download and install Service Disabler from Playstore and Grant su permission after opening the app .
4: Search for Google Play Services and click on that .
5: Scroll down the list till you find NearbyMessagesService and click it to disable it permanently.
6: Now Make sure you have Google's "Nearby" functionality disabled
Go-to your Google account - Device connections - Devices - Show Notifications off.
Now back to settings - Passwords and security - Location - Scanning - turn all off
And reboot.
Now my other device is on stock MIUI and I haven't tried this on stock rom as of yet. It's my wife's device so if she lets me I will test this on her device as same issue is present.
In time I will try to see if this "fix" will retain if I unroot the device after..
*Update* this will continue to work if you unroot device.
*Update* when I installed latest Xiaomi.eu rom 11.0.10 sometimes it don't work till I reboot. Not sure why yet.
thanks for sharing
but for me I just changed the Channel used in my router and everything works fine
bertiespeed said:
Since the Redmi 8 don't have 5ghz Wifi capability we are stuck with 2.4ghz wifi and on my 2 Redmi 8 devices with Bluetooth enabled that kills the speeds to about 5mb. Apperently Bluetooth and 2.4ghz wifi run off same hardware or software and don't appear to play nice together..
I use multiple different wifi connections a day and was a problem for me. Anyway so this was the workaround that fixed the problem for me and my device. Pretty simple and straight forward and suppose it could work on other devices with same issue..
Always only try this at your own risk.. *As Root is Required*
First off: I'm located in Canada, could be different in another region.
I have a unlocked bootloader
latest stable Xiaomi.eu rom for the Redmi 8 installed
Official TWRP installed..
2: *Root Required*
Download and Install latest version of Magisk and flash via TWRP
3: Download and install Service Disabler from Playstore and Grant su permission after opening the app .
4: Search for Google Play Services and click on that .
5: Scroll down the list till you find NearbyMessagesService and click it to disable it permanently.
6: Now Make sure you have Google's "Nearby" functionality disabled
Go-to your Google account - Device connections - Devices - Show Notifications off.
Now back to settings - Passwords and security - Location - Scanning - turn all off
And reboot.
Now my other device is on stock MIUI and I haven't tried this on stock rom as of yet. It's my wife's device so if she lets me I will test this on her device as same issue is present.
In time I will try to see if this "fix" will retain if I unroot the device after..
*Update* this will continue to work if you unroot device.
Click to expand...
Click to collapse
Also working for descendant os thanks
ahmedsheme said:
thanks for sharing
but for me I just changed the Channel used in my router and everything works fine
Click to expand...
Click to collapse
i have the same problem, i change the channel in my router, but still the connection is cut half when i turning bluetooth
ariw182 said:
i have the same problem, i change the channel in my router, but still the connection is cut half when i turning bluetooth
Click to expand...
Click to collapse
try channel nom 10 or 11
guys you have slow wifi because your wifi and bluetooth are using 2,4ghz they interfere with eachother you need to download an app like wifi analyzer and go to the last tab then look which channel isnt used and use the channel which isnt used i hope i helped you
without root is there any fix?
Yes WiFi and Bluetooth in same frequency range but that should not cause problem. My mi 8 lite manages to communicate with my mi band 3 and use WiFi ok. I had an ulefone and that worked ok. I had a blackview and that worked ok. The redmi note 8 pro did not. At first I thought it was maybe a bad chip that was leaking so tried another with same result. So its hardware related or software. But it's not the fact of both using same frequency band. As Bluetooth is not as strong a signal I would have expected that to drop not WiFi.
Xiaomi should have sorted this by now. Miui 12 still hasn't fixed this.
Fix for home wlan use
Skinupanother said:
Yes WiFi and Bluetooth in same frequency range but that should not cause problem. My mi 8 lite manages to communicate with my mi band 3 and use WiFi ok. I had an ulefone and that worked ok. I had a blackview and that worked ok. The redmi note 8 pro did not. At first I thought it was maybe a bad chip that was leaking so tried another with same result. So its hardware related or software. But it's not the fact of both using same frequency band. As Bluetooth is not as strong a signal I would have expected that to drop not WiFi.
Xiaomi should have sorted this by now. Miui 12 still hasn't fixed this.
Click to expand...
Click to collapse
This is a big problem and Xiaomi should fix in the next update!
However if you mainly use Wifi at home, change the wifi frequency to 5ghz and the problem is gone.
In my modem/router you can do separate 2,4ghz and 5ghz networks (both work at same time), so my Laptop and Xiaomi phones are on 5ghz (a lot better speed in both) and old hardware are in the 2,4ghz network.
Didn't know this before, but now also my laptop wifi speed came from 30-40mb-> 120mb.
NokiaMokia said:
This is a big problem and Xiaomi should fix in the next update!
However if you mainly use Wifi at home, change the wifi frequency to 5ghz and the problem is gone.
In my modem/router you can do separate 2,4ghz and 5ghz networks (both work at same time), so my Laptop and Xiaomi phones are on 5ghz (a lot better speed in both) and old hardware are in the 2,4ghz network.
Didn't know this before, but now also my laptop wifi speed came from 30-40mb-> 120mb.
Click to expand...
Click to collapse
Redmi 8 doesn't support 5ghz network as stated in first post ...
Skinupanother said:
Yes WiFi and Bluetooth in same frequency range but that should not cause problem. My mi 8 lite manages to communicate with my mi band 3 and use WiFi ok. I had an ulefone and that worked ok. I had a blackview and that worked ok. The redmi note 8 pro did not. At first I thought it was maybe a bad chip that was leaking so tried another with same result. So its hardware related or software. But it's not the fact of both using same frequency band. As Bluetooth is not as strong a signal I would have expected that to drop not WiFi.
Xiaomi should have sorted this by now. Miui 12 still hasn't fixed this.
Click to expand...
Click to collapse
Are you kidding me? Well, what a waste of mobile I have bought ... everything is fine except for something as important as connectivity. Ok Xiaomi ... Does anyone know of any ROM that this failure does not pass? so far all the ones I've tried happen the same ... :crying::crying:
I also tried the proposed fix (on latest Stock rom / Android 10) and unfortunately it did not work Any other suggestions how to solve this extremely annoying bug?
hollol said:
I also tried the proposed fix (on latest Stock rom / Android 10) and unfortunately it did not work Any other suggestions how to solve this extremely annoying bug?
Click to expand...
Click to collapse
Install a custom rom like HavocOs
I have the solution ===>>> youtu . be / WMksEEKXlJY
The problem is interference with Wi-Fi and Bluetooth Scanning.
DISABLES THESE TWO CONFIGURATIONS
On MIUI 11:
SETTINGS >> Passwords & Security >> Location >>> Scanning >>>
Wi-Fi scanning> (OFF)
Bluetooth scanning> (OFF)
On MIUI 12
SETTINGS >>> LOCATION >>> Scanning >>>
Wi-Fi scanning> (OFF)
Bluetooth scanning> (OFF)
This will solve the problem of drops in the wifi.
It is NOT POSSIBLE to use Bluetooth in conjunction with wifi. But with these settings disabled, you can use wifi with better quality (as long as Bluetooth is disabled).
WEDSON said:
I have the solution ===>>> youtu . be / WMksEEKXlJY
Click to expand...
Click to collapse
Thanks. I watched the video, but unfortunately it is not in English, so I didn't really understand what the actual solution is. For me it seems, that your main "trick" is to switch from 2.4GHz to 5GHz WIFI, is this right?
Would it be possible for you to write a short manual on your steps here in English, that would be great!
Thanks, Lars
hollol said:
Thanks. I watched the video, but unfortunately it is not in English, so I didn't really understand what the actual solution is. For me it seems, that your main "trick" is to switch from 2.4GHz to 5GHz WIFI, is this right?
Would it be possible for you to write a short manual on your steps here in English, that would be great!
Thanks, Lars
Click to expand...
Click to collapse
The problem is interference with Wi-Fi and Bluetooth Scanning.
DISABLES THESE TWO CONFIGURATIONS
On MIUI 11:
SETTINGS >> Passwords & Security >> Location >>> Scanning >>>
Wi-Fi scanning> (OFF)
Bluetooth scanning> (OFF)
On MIUI 12
SETTINGS >>> LOCATION >>> Scanning >>>
Wi-Fi scanning> (OFF)
Bluetooth scanning> (OFF)
This will solve the problem of drops in the wifi.
It is NOT POSSIBLE to use Bluetooth in conjunction with wifi. But with these settings disabled, you can use wifi with better quality (as long as Bluetooth is disabled).
Thanks for the update.
Have already disables these options, but was hoping to be able to use Bluetooth in conjunction with WIFI, since my smartwatch is always connected to the phone by Bluetooth
So unfortunately no final solution for me :crying:
WEDSON said:
The problem is interference with Wi-Fi and Bluetooth Scanning.
DISABLES THESE TWO CONFIGURATIONS
On MIUI 11:
SETTINGS >> Passwords & Security >> Location >>> Scanning >>>
Wi-Fi scanning> (OFF)
Bluetooth scanning> (OFF)
On MIUI 12
SETTINGS >>> LOCATION >>> Scanning >>>
Wi-Fi scanning> (OFF)
Bluetooth scanning> (OFF)
This will solve the problem of drops in the wifi.
It is NOT POSSIBLE to use Bluetooth in conjunction with wifi. But with these settings disabled, you can use wifi with better quality (as long as Bluetooth is disabled).
Click to expand...
Click to collapse
ahmedsheme said:
try channel nom 10 or 11
Click to expand...
Click to collapse
It worked!
Thanks for the suggestion, moving from channel 6 to 13 did the trick! I can finally watch videos with Bluetooth speakers.
Would Xiaomi.EU fix these issues? If so, I'll aim for that ROM!

Question Does Xiaomi 11T Pro support Wifi 6Ghz (Wifi 6E)?

I lived in apartment and wifi 5Ghz channel is quite crowded. So, I'm considering move to 6Ghz.
According to GSMArena. Xiaomi 11T Pro is not support 6E. However, Qualcomm page do mention that Snapdragon 888 has WiFi 6E built in.
So, I wonder that is Xiaomi 11T Pro support 6Ghz or not?
removed*
The fact that the number 6 appears on the Wi-Fi icon does not mean that it is on the 6ghz frequency, it means that you are connected to a network with Wi-Fi 6 technology, that is, 802.11ax, but going back to the original question in the post, the snapdragon 888 mounts the FastConnect 6900 chip, which does have support for wifi6E.
mixelyn88 said:
The fact that the number 6 appears on the Wi-Fi icon does not mean that it is on the 6ghz frequency, it means that you are connected to a network with Wi-Fi 6 technology, that is, 802.11ax, but going back to the original question in the post, the snapdragon 888 mounts the FastConnect 6900 chip, which does have support for wifi6E.
Click to expand...
Click to collapse
It was Xiaomi who decided that the 11 t pro only has Wifi6.
As with some other devices like the 12 pro may have WiFi 6E depending on the country.
https://www.qualcomm.com/products/technology/wi-fi/fastconnect/fastconnect-6900
HI , yes it's support 6Ghz , i'm using it right now .
Click to expand...
Click to collapse
No, I do have 6 numbers even though I running 5Ghz but with 802.11ax
It was Xiaomi who decided that the 11 t pro only has Wifi6.
Click to expand...
Click to collapse
This is the software level or hardware level? Can we root and enable wifi 6e ?
pureexe said:
No, I do have 6 numbers even though I running 5Ghz but with 802.11ax
Click to expand...
Click to collapse
Oh ok sorry , I will delete my post.
It would be more beneficial to move to the 2.4ghz band rather than up. the range and coverage is typically better. You should be able to reach 150mbit with 2.4ghz band.
If your 5ghz band is overcrowded you may need a more powerful AP.
Alternatively you could use an ethernet cable and connect the ethernet adapter on your usbc port.
2.4 GHz also crowded and I already have a Gigabit internet. So, I don't move to 2.4GHz.
A USB port is not practical. because it is a phone.
My temporary solution is to move AP close to my bed as possible because I mainly use my phone on the bed. but it make a wifi randomly disconnect when go to the toilet.

Samsung Dex HDMI wifi problems

hello good evening colleagues
I have an issue that had already happened to me on my samsung S9 and now it happens to me on my s20 FE 5g
the problem occurs in samsung Dex HDMI
when using any app or game
the internet is slow and does not load or loads very slowly and disconnects me.
It had happened to me before, but I don't remember how I solved it.
this happens when i connect my HUB + HDMI adapter and start samsung Dex . Network speed drops drastically.
Hello partners
after an insatiable fight.
after buying another HUB + usb + HDMI. and HDMI 2.0 cable
the problem persisted.
until I remember that the problem lies in the internet modem.
hahaha
The problem is exactly in the channel where the modem is configured, you have to find which channel is less saturated
in automatic mode it showed me very slow.
I hope this information is useful.
since in automatic channel the speed of the s20 FE can drop very drastically (of course it also depends on the modem if it is modern or old)
Can this thread be closed?
the problem comes from android 13 update
apologies...
Walmart onn adapters work perfect , no lag.
Tigerevo said:
Walmart onn adapters work perfect , no lag.
Click to expand...
Click to collapse
hello colleague
yes, you are right
my problem is with wifi usually in 2.4 ghz networks.
in online games.
It lags, in an unenjoyable way.
Since android 13 this problem arose.
At the moment I only have a router 1 band 2.4
mezacorleehone said:
hello colleague
yes, you are right
my problem is with wifi usually in 2.4 ghz networks.
in online games.
It lags, in an unenjoyable way.
Since android 13 this problem arose.
At the moment I only have a router 1 band 2.4
Click to expand...
Click to collapse
You can try getting closer to router , also on phone go to dev settings and limit background apps to none or 1 at bottom. That usually gives a little speed boost. You can prob find a 5g router at goodwill , and if it doesnt work out of box you can go look up dd wrt for it !
Tigerevo said:
You can try getting closer to router , also on phone go to dev settings and limit background apps to none or 1 at bottom. That usually gives a little speed boost. You can prob find a 5g router at goodwill , and if it doesnt work out of box you can go look up dd wrt for it !
Click to expand...
Click to collapse
hello colleague
Thanks for your reply.
I already tried everything on my Router.
With Android 12 everything was running fine.
It is a 2.4ghz router.
Already modify any type of parameter. (scope, channels, etc)
but everything stays the same.
I clarify, the failure is in online games, there is a delay.
on facebook it may take a while to load between other apps.
in another house there is a dual band router.
In 5g there seems to be no delay, everything flows fine.
but i connect to 2.4 and it starts the delays.
something that did not happen to me in android 12.
mezacorleehone said:
hello colleague
Thanks for your reply.
I already tried everything on my Router.
With Android 12 everything was running fine.
It is a 2.4ghz router.
Already modify any type of parameter. (scope, channels, etc)
but everything stays the same.
I clarify, the failure is in online games, there is a delay.
on facebook it may take a while to load between other apps.
in another house there is a dual band router.
In 5g there seems to be no delay, everything flows fine.
but i connect to 2.4 and it starts the delays.
something that did not happen to me in android 12.
Click to expand...
Click to collapse
Yes 5g is faster up close . The 2g is slower also bc everything ran off 2g . Think about 2g house phones everyone had. Theres more traffic on those . 5g has less traffic which helps increase your bandwidth.
Hi,
just wanted to mention, that i have the same issue
* on a Galaxy S22 with android 13 (regardless of Dex, but whenever screen is shared via a usb-c to hdmi adapter) and
* on a Huawei P20 Pro with android 12 (sometimes, not always)
replugging the usb-c adapter always immediately solves the issue but only for a brief time.
I hit this problem while traveling and using the hotel tv to watch movies that I stream via the phone over the hotel wifi (80mbits, but when the bug is on: <1 mbit) (changing the router is obviously not feasible in my case )
Could that be a general android / kernel bug?
Does anyone have a hypothesis for a technical explanation?
The bug is not occuring on 4G cellular network. Didn't test for 5ghz Wifi

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