Database Users

WIFI Spectrum analyser, is there one?

Bit of an obscure request but any thoughts as to if it is possible to use the Wifi in a Tytn to scan for any wireless signals in the 2.4Ghz wifi band.
I already use sniffi but it only shows channelised info.. I need something that can show sigs from video senders etc in the nearby area...
If I'm trying to get a flakey router talking to a pc it would be nice to be able to see what else is around..
Any thoughts chaps...
Phil

Not possible on your tytn... it will only see IEEE 802.11 packets.
Google "wi-spy" for a cheap and nice solution, but not using your PDA

Wi Spy looks interesting, not sure if I can justify the cost at the mo' ....
Looks like I'll have to carry on just using sniffi for now as mini stumbler doesn't seem to work, well doesn't see the wireless chip/card in the Tytn and I can't seem to find anything else better..
Will think about WiSpy in the new year.... Cheers
Phil

[Q] 4.2.1 unsupported wi-fi?

I realized that my University's wifi somehow does not support 4.2.1
I've asked them about it, and they said 4.2's kernel might be different and it might not recognize the wifi.
What can i do about that without downgrading? (My device is rooted.)
Thanks.

Perhaps you should say a few words about your University WiFi. Same goes for what you have done to your N7 (as you stated that it is rooted). Maybe you could mention whether or not you personally had it working with a 4.1.x-derived ROM on the phone - reading between the lines it sounds like that might be the case, but it isn't clearly stated.
"Does not support" is not very descriptive.
First - does the WiFi scan on the N7 display the network? (e.g. the N7 does not support Ad-Hoc networks, so they won't even show up in the first place)
What details can you provide about the WiFi network?
- Ad-hoc or Infrastructure mode?
- is WEP/WPA/WPA2 in use?
- if Y to above question, how is key distribution performed?
Are there any other relevant symptoms, such as the N7 connecting, but then fails to get an IP address - or gets an IP, but still acts as if not connected?
If you are convinced that it is in fact a 4.1.x vs. 4.2.x issue, could you not just install a 4.1.x-derived ROM?

Note also that the n7 does not support WiFi N band. Make sure the university provides G support.
Sent from my Nexus 7 using xda app-developers app

The N7 absolutely supports 802.11 b/g/n. Take a look at the tech specs in Play store.

bftb0 said:
Perhaps you should say a few words about your University WiFi. Same goes for what you have done to your N7 (as you stated that it is rooted). Maybe you could mention whether or not you personally had it working with a 4.1.x-derived ROM on the phone - reading between the lines it sounds like that might be the case, but it isn't clearly stated.
"Does not support" is not very descriptive.
First - does the WiFi scan on the N7 display the network? (e.g. the N7 does not support Ad-Hoc networks, so they won't even show up in the first place)
What details can you provide about the WiFi network?
- Ad-hoc or Infrastructure mode?
- is WEP/WPA/WPA2 in use?
- if Y to above question, how is key distribution performed?
Are there any other relevant symptoms, such as the N7 connecting, but then fails to get an IP address - or gets an IP, but still acts as if not connected?
If you are convinced that it is in fact a 4.1.x vs. 4.2.x issue, could you not just install a 4.1.x-derived ROM?
Click to expand...
Click to collapse
I know that, Wi-Fi works with Galaxy S 3 having 4.1.1
And the setting used to access Wi-Fi are as follows:
Security: 802.1x EAP
EAP Method: PEAP
Phase 2 Authentication: MSCHAPV2
... And I put-in my username and password in the followings.
I tried to connect, it shows the signal much weaker then it actually is, then it tried to connect, but just fails...

Zhoene said:
I know that, Wi-Fi works with Galaxy S 3 having 4.1.1
Click to expand...
Click to collapse
That's all well and good, but it doesn't necessarily mean that 4.1.x vs. 4.2.x is the cause of things. Different hardware, different OS, and presumably different WiFi radio hardware and firmware. Could be any of those things, the OS being one of them.
Zhoene said:
And the setting used to access Wi-Fi are as follows:
Security: 802.1x EAP
EAP Method: PEAP
Phase 2 Authentication: MSCHAPV2
... And I put-in my username and password in the followings.
I tried to connect, it shows the signal much weaker then it actually is, then it tried to connect, but just fails...
Click to expand...
Click to collapse
Association and Authentication to a WiFi AP have lots of moving parts. It is possible that the problem is with either of them. (My WAG would be the authentication process) Without a super-geek that can help you with wireless sniffing (to see if the fault location can be inferred), or your campus IT help desk being able to look at authentication logs, you don't really have much recourse but to:
- do something drastic (e.g. install new ROMs)
- experiment with the settings in the WiFi "Add network" page, and look to see if you get any meaningful or diagnostic messages in the system logs. I tried it just now, but I don't have an 802.1x AP available to test (a failed PW, for instance) with to see if anything diagnostic shows up in logcat. Is it possible that it is just a bad password entry? (I have had problems when I cut and paste in android with various apps inserting a leading space ahead of the paste).
The 4.1.2 factory image for the WiFi N7 (grouper) is still available from Google - I think the form in which they provide it to you needs to be flashed using fastboot though, and managing that seems to cause newbs trouble. You might want to just find an older ROM which is based on 4.1.x and try it to see if it fits your hypothesis. (If you fool with a factory ROM install, make sure you have backups of EVERYTHING first).
Good luck

I have taken my nexus 7 to IT they looked into it and they said its possibly that it not compatible with 4.2.1
I guess downgrading to 4.1.2 might do trick, but I also don't want to leave the awesome features of 4.2.1
I guess I will firstly try different kernels and see if they change anything.

This thread contains reports of problems with both 4.1.x and 4.2.x N7's
I suspect that just reflects a diversity of different wireless networks; but anyway - see the logcat entries with "I/wpa_supplicant" in them? Your tablet (on 4.2.1 or whatever) might have similar things in it that gives clues as to where the errors occur.
You can get logcats with adb - or failing that, there are free market apps you can get which will dump the logcat to a file of your chosing.
Good luck

Thanks I will take a look at those.

Miss-statement on my part earlier. Nexus 7 does support 802.1n operation - but only in the 2.4ghz band. 5ghz is not supported. My router supports both - and the faster ssids are not even visible on the Nexus 7.
Sent from my Nexus 7 using xda app-developers app

Is that all about hardware, or is there a software wise solution to it?

Zhoene said:
Is that all about hardware, or is there a software wise solution to it?
Click to expand...
Click to collapse
802.11n specifies channel bonding techniques as well as optional use of the 5 Ghz radio band.
So, marketers can safely say "Wifi N" or some such - as long as the hardware/software can do channel bonding (but possibly not operate in the 5 Ghz band).
Here's Asus N7 Spec Page, as you see they do not mention 5Ghz Wifi.
My thinking is that if the hardware had it, it would also show up proudly in the specs.
A to the Q: hardware.
It now occurs to me that Zhoene earlier had said
Zhoene said:
I tried to connect, it shows the signal much weaker then it actually is, then it tried to connect, but just fails...
Click to expand...
Click to collapse
A university setting probably would be a WDS (Wireless Distribution System) with many AP's. Possibly Zhoene was sitting close to a 5Ghz-only AP, and "seeing" a multi-band AP at a good distance away? Sure would be consistent with rmm200's observations on his/her router.
Also, I see reports of 5 Ghz service achieved on Galaxy S3 (Zhoene prev mentioned)
Perhaps this is exactly a 5Ghz AP vs. Nexus 7 issue.
And, oh crap after all this writing I did a search
http://forum.xda-developers.com/showthread.php?t=1777431&highlight=5ghz+802+11n&page=3
Zhoene you could ask your campus IT if there are any A/B/G- or B/G-only APs in their network & see if you can connect at those locations. If it was something weird like Beacons only in 5Ghz-band channels (I think that would violate the IEEE specs), then you could have been trying to connect to very remote APs - all the while getting clobbered by other devices sitting nearby doing 802.11n in the 2.4Ghz band, but also the nearby AP as well if it was operating in multi-band mode.

Thanks a lot for all the information, I'll try to find out what the problem really is using those informations.

Some of this talk of networking is over my head, but what I would try is flashing a 4.1.2 ROM/image and seeing if that fixes it. 4.1.1 had a bug that prevented the Nexus 7 from connecting to WPA-Enterprise networks, which is what my university uses (I know because my Kindle can't connect to it). 4.1.2 fixed this, and my Nexus 7 (on 4.1.2) can connect to my university's network. I have been rejecting the update to 4.2.1 after hearing about issues, so I don't know if it works with 4.2.1.

Wi-Fi connectivity issues

Somewhat of an odd issue with Wi-FI
First the phone is a 100% stock (unrooted) Sprint issued Galaxy S5.
Access point is a Cisco 1142 in Autonomous mode running 802.11n (2.4 & 5ghz with a 40Mhz extended channel in the 5Ghz band). Both IPv4 and IPv6 (utilizing auto configure) are on my network.
Three laptops report up to 300Mb/s connectivity and work flawlessly
Three iPhones work without any issues
Two iPads (Wi-Fi only) also work without issue
Galaxy S3 work without issue
HTC EVO work without issue
The Galaxy S5 connects and works fine for a random period of time, seems to be typically between 1 and 3 hrs and then simply stops communicating, I've tried a static (IPv4) address but to no avail. Sometimes I'll find that only the IPv4 stops working but IPv6 continues to work or vis versa.
One thing I did note was the S5 never reports a speed higher than 144Mb/s regardless of the signal strength. I haven't tried disabling the extended channel on the 5Ghz band, maybe the S5 has a problem with that?
Lastly connecting to an 802.11g AP seems to work reliably.
Any thoughts/suggestions? I'm not opposed to rooting the phone if there is a known issue that is solved by modified code.
-TL

Tried disabling Smart Network Switch in WiFi settings?

Should have mentioned that -
Under Wi-Fi advanced
Network notification - unchecked
passpoint - checked
sort by - signal strength
keep wi-fi on during sleep - always
always allow scanning - unchecked
smart network switch - unchecked
Wi-Fi timer - all times unchecked
-TL

The access point "had" two SSIDs being announced, I took one off and the stability problems seem to have gone away, now to figure out if I'm announcing the second SSID incorrectly or something else is going on.
-TL

Time_Lord said:
The access point "had" two SSIDs being announced, I took one off and the stability problems seem to have gone away, now to figure out if I'm announcing the second SSID incorrectly or something else is going on.
-TL
Click to expand...
Click to collapse
Is it a dual band router?
Sent from my Tw5ted SM-G900A using Tapatalk

Is it a dual band router?
Click to expand...
Click to collapse
It's a Cisco 1142 AP (1140 series) in Autonomous mode, 2.4/5Ghz 802.11n, Per Cisco's glossy - "The 1140 Series is a dual-band, 802.11n access point with integrated antennas."

Time_Lord said:
It's a Cisco 1142 AP (1140 series) in Autonomous mode, 2.4/5Ghz 802.11n, Per Cisco's glossy - "The 1140 Series is a dual-band, 802.11n access point with integrated antennas."
Click to expand...
Click to collapse
You might have the 2.4 GHz and 5 GHz band named the same then.
Sent from my Tw5ted SM-G900A using Tapatalk

You saying I should or should not have the band's named the same?
Sent from my SM-G900P using Tapatalk

You might have the 2.4 GHz and 5 GHz band named the same then.
Click to expand...
Click to collapse
You might be onto something, based upon what I've found and my understanding of Wi-Fi there should be no issue with putting the same SSID on both radios; however I've found that the S5 seems to be switching back and forth a lot and is failing whenever its on the 5Ghz radio. I have since turned off the 5Ghz radio (of course that reduces my throughput to 144Mb/s on Wi-Fi vs 300 but I doubt I'll see a difference).
I've seen some various comments about 5Ghz not working properly for some, I don't know if this is a real issue or not.
Also keep in mind my 5Ghz radio was set for a double wide channel (40Mhz vs. the small 20Ghz) enabling 300Mb/s.
-TL

Time_Lord said:
You might be onto something, based upon what I've found and my understanding of Wi-Fi there should be no issue with putting the same SSID on both radios; however I've found that the S5 seems to be switching back and forth a lot and is failing whenever its on the 5Ghz radio. I have since turned off the 5Ghz radio (of course that reduces my throughput to 144Mb/s on Wi-Fi vs 300 but I doubt I'll see a difference).
I've seen some various comments about 5Ghz not working properly for some, I don't know if this is a real issue or not.
Also keep in mind my 5Ghz radio was set for a double wide channel (40Mhz vs. the small 20Ghz) enabling 300Mb/s.
-TL
Click to expand...
Click to collapse
There's no issue until you have a device(such as the s5) that sees both bands, people do this with public WiFi as well, they put up a malicious hotspot with the same name as the public one. I would give your 5g band a different name that's what I do, its just said for 2.4 and ssid-5G for the 5.
Sent from my Tw5ted SM-G900A using Tapatalk

Any suggestions for prioritizing Wifi networks?

Now what I mean by this is if I have multiple overlapping wifi networks I want to be able to select which one the phone will prioritize its connection to
Why this is important for me is at home I have my 5Ghz network and my normal network(2.5Ghz I think).The 5Ghz network wont travel as far as my other network but speeds are much better
So basically I want my phone to use the 5Ghz network until its no longer available.Another example of how I want to use this is at work I have access to my private wifi around my desk and corp wifi around the office
The corp wifi blocks access to certain content so by prioritizing my private wifi the phone would stay connected to it unless it loses coverage and then it would switch to the corp wifi and vice versa
I tried a bunch of apps I could find and none seem to work too well. I know some versions of CM had something like this but cant seem to find anyway to do this properly on stock ROMs which I figure would be a good feature
Any suggestions would be welcome

My case the only way I have found to solve that was enabling roaming assistant on my routers (RT-AC88U's) to help my devices switch to stronger signals, and smart connect to switch from 5ghz to 2.4ghz and viceversa when bandwith on that band is saturated.
Sent from my SM-G935FD using TapaTalk

sentinelvdx said:
My case the only way I have found to solve that was enabling roaming assistant on my routers (RT-AC88U's) to help my devices switch to stronger signals, and smart connect to switch from 5ghz to 2.4ghz and viceversa when bandwith on that band is saturated.
Sent from my SM-G935FD using TapaTalk
Click to expand...
Click to collapse
Unfortunately that would only help for the area around the router. I'm looking for a phone based solution
I would figure in this day and age this should be a default feature

Yeahp... that's why I have subscribed to your thread to see if someone has phone based solution

Here it is https://goo.gl/5L6ymo
You're welcome

whynottoday said:
Here it is https://goo.gl/5L6ymo
You're welcome
Click to expand...
Click to collapse
Thanks but tried this app already but half the time it isnt doing what it should
Hasnt been updated in over a year either

fidorulz said:
Thanks but tried this app already but half the time it isnt doing what it should
Hasnt been updated in over a year either
Click to expand...
Click to collapse
Works great for me

whynottoday said:
Works great for me
Click to expand...
Click to collapse
Tried the app again to see if I missed something and it pretty much has nothing from what im looking for. There is no option to prioritize specific SSID. You can prioritize 5Ghz or setup specific signal thresholds but what im talking about is an app that will prioritize SSID
So for example if I have WIFI 1 and WIFI 2 both have great signal but I prefer WIFI 1 unless it has no service then and only then it will goto WIFI 2. Once I go back in the coverage area for WIFI 1 it switches back

Found this app and so far so good.
https://play.google.com/store/apps/details?id=app.com.superwifi&rdid=app.com.superwifi
It has the option to prioritize by SSID
Will test a little longer

This also seems very promising
https://play.google.com/store/apps/details?id=org.za.flash.wifiprioritizer&hl=en

fidorulz said:
Now what I mean by this is if I have multiple overlapping wifi networks I want to be able to select which one the phone will prioritize its connection to
Why this is important for me is at home I have my 5Ghz network and my normal network(2.5Ghz I think).The 5Ghz network wont travel as far as my other network but speeds are much better
So basically I want my phone to use the 5Ghz network until its no longer available.Another example of how I want to use this is at work I have access to my private wifi around my desk and corp wifi around the office
The corp wifi blocks access to certain content so by prioritizing my private wifi the phone would stay connected to it unless it loses coverage and then it would switch to the corp wifi and vice versa
I tried a bunch of apps I could find and none seem to work too well. I know some versions of CM had something like this but cant seem to find anyway to do this properly on stock ROMs which I figure would be a good feature
Any suggestions would be welcome
Click to expand...
Click to collapse
You know Tasker? With the autotools plugin you might be able to do this. You could make it search for ssid and if xx ssid is available, connect to it. I don't have time for more in depth before the day after tomorrow, but quote me if you need help.

Faspaiso said:
You know Tasker? With the autotools plugin you might be able to do this. You could make it search for ssid and if xx ssid is available, connect to it. I don't have time for more in depth before the day after tomorrow, but quote me if you need help.
Click to expand...
Click to collapse
Thanks ill tinker around with it for a while

https://play.google.com/store/apps/details?id=com.seah0rse.swififree
Lets you prioritise 5ghz, and also set at what difference in signal strength it should switch to better network

asjstian said:
https://play.google.com/store/apps/details?id=com.seah0rse.swififree
Lets you prioritise 5ghz, and also set at what difference in signal strength it should switch to better network
Click to expand...
Click to collapse
Thanks but mainly looking for SSID filter vs signal or 5Ghz.
You can have different SSID for 5Ghz vs regular which is what I do at home but at work 5Ghz isnt available to I mainly need to prioritize one SSID over another unless its not available

Did you try Tasker o Automate? (I didn't try it yet, that's why I'm asking). Tasker is a very powerful tool which can help on such things.

sentinelvdx said:
Did you try Tasker o Automate? (I didn't try it yet, that's why I'm asking). Tasker is a very powerful tool which can help on such things.
Click to expand...
Click to collapse
I use Tasker but only for simple tasks such as when bluetooth connects change audio info
Otherwise many of the options go over my head

sentinelvdx said:
My case the only way I have found to solve that was enabling roaming assistant on my routers (RT-AC88U's) to help my devices switch to stronger signals, and smart connect to switch from 5ghz to 2.4ghz and viceversa when bandwith on that band is saturated.
Sent from my SM-G935FD using TapaTalk
Click to expand...
Click to collapse
Eh . I'm going to buy AC88U later this month. I wanna know. So. I know that if you enable roaming assistant on 5ghz. It'll switch your phone to 2.4 when the RSSI match the settings. But the thing I don't know is. If we can do the same for 2.4ghz. so when it reaches how much high strength it'll disconnect it. So making the client connect to the 5ghz. Well I know smartconnect can do it. But smartconnect disables the channel selection. Thanks [emoji4]

Samsung Galaxy A20 5ghz Wifi not working.

To be clear off the bad, its not the router. Every other device in the house that connects to the 5ghz band works flawlessly. This is a brand new international phone being use with AT&T in the US, calls and texts function fine. Phone is fully updated and so is the router.
Wifi however is only picks up 2.4ghz bands. Not 5ghz.
Wifi analyzers pick up 2.4ghz but when switching to 5ghz I get a messages stating my phone does not support 5ghz. Anyone else with this issue?

@aq3e No. It doesn't have 5GHz.
2.4GHz has better penetration through walls anyway.
5GHz is really only good if you're in the same room.

physwizz said:
@aq3e No. It doesn't have 5GHz.
2.4GHz has better penetration through walls anyway.
5GHz is really only good if you're in the same room.
Click to expand...
Click to collapse
The phone does 5GHz as mentioned on samsungs website : 802.11 a/b/g/n/ac 2.4+5GHz

Snekxs said:
The phone does 5GHz as mentioned on samsungs website : 802.11 a/b/g/n/ac 2.4+5GHz
Click to expand...
Click to collapse
I have dual band and can only see 2.4
Might be different in other countries.
Australia had only 2.4 as shown here.
Connectivity
ANT+
No
USB Interface
USB Type-C
USB Version
USB 2.0
Location Technology
GPS, Glonass, Beidou
Earjack
3.5mm Stereo
MHL
No
Wi-Fi
802.11 b/g/n 2.4GHz
Wi-Fi Direct
Yes
Bluetooth Version
Bluetooth v5.0 (LE up to 2 Mbps)
NFC
Yes
https://www.samsung.com/au/smartpho...-Q3bFagLE-84I8pWNocaAq5vEALw_wcB&gclsrc=aw.ds

I also dont have 5ghz and dont have the advacned wifi option to change bands... Why this model suck this much? Probably a OS stupid limitation...

rophiroth said:
I also dont have 5ghz and dont have the advacned wifi option to change bands... Why this model suck this much? Probably a OS stupid limitation...
Click to expand...
Click to collapse
5ghz is only good if you're in the same room

The A20 does support dual band, but it's disabled. I tried to enable it by replacing the mx140_wlan.hcf file located at /vendor/etc/wifi/ with the one from the A30 and it worked, but there's a problem.
For some reason the signal range is terrible, to detect a 5 GHz network the phone needs to be next to the router, if it gets some centimeters away the signal drops at the point where the network is not detected anymore.

physwizz said:
5ghz is only good if you're in the same room
Click to expand...
Click to collapse
5ghz wifi is certainly not only good in the same room, check online heatmaps of 2.4 vs 5ghz to compare, it's not a huge difference. Given how much less interference you will get on the 5ghz it often works a lot better than 2.4ghz even at longer ranges. Fix peoples internet for a living and I've seen thousands of peoples speeds double or even triple from changing to 5ghz even when router is on the first floor and they use it on the second.

FrankdonkeybrainReynolds said:
5ghz wifi is certainly not only good in the same room, check online heatmaps of 2.4 vs 5ghz to compare, it's not a huge difference. Given how much less interference you will get on the 5ghz it often works a lot better than 2.4ghz even at longer ranges. Fix peoples internet for a living and I've seen thousands of peoples speeds double or even triple from changing to 5ghz even when router is on the first floor and they use it on the second.
Click to expand...
Click to collapse
Read the article here.
It shows that 5ghz suffers from greater attenuation rates than 2.4
2.4 GHz vs. 5 GHz WiFi
Learn about when to use 2.4 GHz vs. 5 GHz WiFi with CenturyLink. The difference between these frequencies can affect your speed.
www.centurylink.com

physwizz said:
Read the article here.
It shows that 5ghz suffers from greater attenuation rates than 2.4
2.4 GHz vs. 5 GHz WiFi
Learn about when to use 2.4 GHz vs. 5 GHz WiFi with CenturyLink. The difference between these frequencies can affect your speed.
www.centurylink.com
Click to expand...
Click to collapse
(I know this doesn't help much with the OP's question but to dispel hearsay I felt it needed to be said.)
I know you don't know me, but I said I resolve peoples internet problems for a living both on supplier and consumer side and have tested this with thousands of customers but you trust a random article with very little info more and don't even bother to look at heat maps? This article has been made by someone who read a blurb about wifi, but they did get one thing right...
"A lot of electronic devices and appliances use the 2.4 GHz frequency, including microwaves, baby monitors, and garage door openers. If you have many of these in your home, or if you live in apartments or condos surrounded by other people, that 2.4 GHz band is likely to be congested, which can damage speed and signal quality."
That list is very short, it also includes lots of computer peripherals, security cameras, smart home devices, walkie talkies, radios, remote controls, wireless handsets (landlines, not mobiles) basically every wireless device you can think of uses 2.4ghz and even your microwave! all these devices on a long range signal means your neighbours devices also overlap to combine together to make the 2.4ghz band for most consumers a disaster for anything requiring more than slow speeds. This goes without even mentioning that the 2.4 ghz band only has 13 channels (3 none overlapping) to spread every wifi device out on to stop interference, in most residential are this is simply not enough. In many cases this is so bad that even next to the router people can lose 80 - 90% of their speeds or have so much interference that even loading webpages takes a long time due to the amount of data being lost.
Like I said before, even if the 5ghz DOES have shorter range, it is not so short that you have to be in the same room, what would be the point? That is a something people assume because it's a "shorter range signal" but it's not that short! the 5ghz is usually faster due to it's naturally higher data rates and more consistent due to the lack of interference from intermittent signals. Most things that interfere with 5ghz are constant and therefore it's much easier to test and know what speed you can get in other rooms away from the router, unlike the 2.4 which has the same issues with passing through anything only with a load of other issues on top too!. The 5ghz also has the advantage of having over 100 wifi channels to spread networks out on to avoid them interfering with each other, a vast upgrade to the 2.4ghz.
Here is an example of a heatmap comparing 2.4 and 5ghz but just looking at any article that goes beyond a very brief description will show you why the 2.4ghz is often so much worse than the 5ghz.
What's the Difference Between 2.4 and 5 GHz WiFi?
What do these numbers actually mean? Does it realy matter? Is one better than the other? How many questions are we going to ask in this description?
socialwifi.com
2ldr - It depends on your house and nearby networks, test both bands with different devices in different rooms and compare speeds, outside of doing more thorough testing with other apps and equipment this is the easiest and quickest way to see which will work better.

You have 2 choises use BT modem BT modem Plan A: one Device in 5GHz network one device sharing Internet from BT modem feature. +Advance use Open Garden mesh client for better Internet throught BT modem. Construction of my plan:One or two devices in 5GHz WiFi network and 3 devices creating PAN network trought Bluetooth.if Your Bluetooth version is 5.0 you can use Mesh network profile. than using Mesh network structure. Mesh Bluetooth network structure helping one device to other. but you need to know you will use 2.4GHz trought BT modem and Mesh networks.

TBM 13 said:
The A20 does support dual band, but it's disabled. I tried to enable it by replacing the mx140_wlan.hcf file located at /vendor/etc/wifi/ with the one from the A30 and it worked, but there's a problem.
For some reason the signal range is terrible, to detect a 5 GHz network the phone needs to be next to the router, if it gets some centimeters away the signal drops at the point where the network is not detected anymore.
Click to expand...
Click to collapse
I fixed this issue on crDroidAndroid-13.0-20221126-a20-v9.0 by copying both mx140_wlan.hcf and mx140.bin taken from this a30 git. Works great on my a20.

shammoi said:
I fixed this issue on crDroidAndroid-13.0-20221126-a20-v9.0 by copying both mx140_wlan.hcf and mx140.bin taken from this a30 git. Works great on my a20.
Click to expand...
Click to collapse
Interesting. What's your A20 model? I believe I also tried to do that, but I'm going to retry it.

Done it on a SM-A205W.

shammoi said:
Done it on a SM-A205W.
Click to expand...
Click to collapse
No luck. I still have the signal issue

Do it again in the following order maybe ?
1. Download both mx140_wlan.hcf and mx140.bin from the git I gave you above.
2. Turn your wifi off.
3. Reach /vendor/etc/wifi folder using your favorite file browser ( Mine is Mixplorer ).
4. Overwrite both files.
5. Reboot your device.
6. Turn Wifi back on.
7. Do a Wifi speed test ( Wi-Fi Sweetspots app for me ).

shammoi said:
Do it again in the following order maybe ?
1. Download both mx140_wlan.hcf and mx140.bin from the git I gave you above.
2. Turn your wifi off.
3. Reach /vendor/etc/wifi folder using your favorite file browser ( Mine is Mixplorer ).
4. Overwrite both files.
5. Reboot your device.
6. Turn Wifi back on.
7. Do a Wifi speed test ( Wi-Fi Sweetspots app for me ).
Click to expand...
Click to collapse
I use a Magisk Module instead of directly overwriting the files, but this should make no difference. I believe it may be a hardware difference between our devices. On the schematics the 5GHz antenna seems to be marked as optional, maybe that has something to do.
I tried to put my device next to the router, and when I did it the network got detected (with bad signal tough), I could connect and the download speed oscillated between ~50-200 mbps (my network has 300 mbps). Once I moved further from it, the WiFi disconnected as the signal was lost.