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2.4 Ghz vs 5 Ghz WiFi

I have both in my home with the same WiFi ssid (and pwd). How do I know to which I am connected? Is there a way to have the Note 5 default to 5 Ghz before trying to use the 2.4 Ghz?

You'd know which one you are connected to because the 5 Ghz usually has "-5ghz" written after the ssid. If not, then settings have been changed in the router and it would be a good idea to revert it back.
To have your phone only connect to 5ghz, just make it forget the other one and it will connect to 5ghz every time. There may be a more technical way to favor 5ghz that I'm unaware of, but this is the most simple.
Sent from my SM-N920V using Tapatalk

He already said they use the same ssid, so your advice doesn't apply.
I have a similar setup as OP - both 2.4 and 5 are identical and AP does automatic band steering. I look at the phone Mac address, and then compare on the list of connected devices on my AP to see what band it is using. Might be an easier way but that's how I do it.
Sent from my SM-N920V using Tapatalk

Thanks guys. I actually have two wireless routers in my home that each have both 2.4 and 5.0 ghz. I have them both set up with the same ssid and pwd so all the connections are seamless for any device anyone may be using in the home (on different channels of course). Just thought there'd be a way to tell with this setup:

Here are pictures of my setup (FIOS-WYLIC) across both bands using WiFi Analyzer -

Update - on my router page it shows all the connections and my Note 5 is automatically connecting to the 5ghz channels instead of the 2.4ghz ones. Excellent to know when both are available with the same ssid and pwd that your phone selects the 5ghz. Well designed Note 5!

I have my frequencies setup under different SSID's. I've had it where both frequencies had the same SSID but different passwords - which frequency you connect to would then only depend on which password you enter. It's all about your setup.

"Good" access points (certainly anything business rated or better) do automatic band steering, where the AP directs a device to 2.4ghz or 5ghz depending on loading and client capability.
In those cases it requires the ssid and passwords to be identical on both 2.4ghz and 5ghz bands.
Sent from my SM-N920V using Tapatalk

No 5GHz Wi-Fi issue

Hello, my Galaxy S7 doesn't detect any 5GHz WiFi AP's.
Have searched some and see that I'm not the only one and some S6 users also have this issue.
Can anyone who also have this issue report it here with firmware versions. (Dial *#1234# to get the info)
My phone came With build G930FXXU1APB6 and now updated to G930FXXU1APF2, but that didn't fix the problem.
The csc is G930FOJV1APF2
And of course if anyone knows if there is a fix please post .
Is it software or hardware broken or did Samsung make some phones with 2.4GHz WiFi only modules?

is your phone stock? have you tried connecting to other 5ghz network other than your home´s? could be a router issue
1. try doing a factory reset (will lose your data) to see if it fixes the problem
2. consider installing new firmware

Maybe your router is not configured correctly. You can choose that the 5ghz network only supports 802.11b for instance. Check that your settings allows all WiFi.

ramanmono said:
Hello, my Galaxy S7 doesn't detect any 5GHz WiFi AP's.
Is it software or hardware broken or did Samsung make some phones with 2.4GHz WiFi only modules?
Click to expand...
Click to collapse
You need to check your Router settings.
If your router has the same SSID for the 2.4GHZ and 5GHZ bands rename the 5GHZ SSID also if you have an option that says Sync with 2.4GHZ under the 5GZ settings set that to No, if it is not already set to No..
For example if they are both called Router just make the name of the 5GHZ SSID Router-5GHZ, save the changes and wait a couple of minutes.
Turn off the wifi on your phone then back on again (do this in the Settings>WiFi) you should see the 5GHZ router name appear in the list of available devices as well as the normal one, just tap that put in the password and connect
This should work, the usual problem is that the router SSID where the names are the same the phone will connect to the 2,4GHZ as default, not always the case but the general cause of it not connecting to Smartphones.

I use the same name for 2.4 and 5 GHz, the phone automatically connects to the best available network. 5 GHz when I'm close to the router, 2.4 GHz when I leave the range of the 5 Ghz. When I return to the 5 Ghz range it connects to it automatically, but not always, then I have to stop and start the WiFi on the phone again to get on the 5 ghz.
Sent from my SM-G930F using Tapatalk

Still no 5GHz Wi-Fi
Hello, I have checked my router and also tried on other 5GHz routers, but still my phone doesn't see any 5GHz channels.
Has anyone tried a firmware for another region?
Am I really the only one on XDA with this problem?

WiFi country code
I have noticed that my 5 GHz does work, but ONLY if the router is manually switched to channel 36 for 5 GHz. My router is WRT 1900AC (4 antennas, bought from US)
I have read that it could have something to do with the wifi country code.
Max link on 5 GHz it is max 200 mbps, which still seems very low, since my non MIMO/single channel crappy laptop wifi also gets 200mbps.
And I heard people getting more then 800mbps ont their S7 phone.
Flashing my phone with an official unbranded firmware from the Netherlands (PHN CSC file), did not fix the WiFi issue.

WiFi Country Code in System file
I have come across this forum in which a user claims a fix, but the phone needs to be rooted.
Does anyone know if this is really the case? My phone is not rooted.

Was there ever a fix here?
My S7 (SM-G930F - BTU, using Oreo build U5ESD2) does not see any of the upper 5 GHz bands. I am trying to connect to a router that is configured to output ONLY on band 149, so there can be no 2.4 GHz "confusion." Changing the configuration to other upper 5 GHz bands doesn't help.

ramanmono said:
Hello, my Galaxy S7 doesn't detect any 5GHz WiFi AP's.
Have searched some and see that I'm not the only one and some S6 users also have this issue.
Can anyone who also have this issue report it here with firmware versions. (Dial *#1234# to get the info)
My phone came With build G930FXXU1APB6 and now updated to G930FXXU1APF2, but that didn't fix the problem.
The csc is G930FOJV1APF2
And of course if anyone knows if there is a fix please post .
Is it software or hardware broken or did Samsung make some phones with 2.4GHz WiFi only modules?
Click to expand...
Click to collapse
just change 5ghz ch no, 149 to 161 । that's it , no need to change firmware

Wifi roaming bug is back on S7

I have two wifi APs with the same SSID and it will stick to one of them with next-to-useless connection while standing near the other one. which would have much better connection.
This works fine on my Nexus 9 tablet and even better on my iPad and my wifes iPhone..
I tried some possible workarounds like Always allow wi-fi roam scans but I didn't see any effect.
This fix for SG3 might work but i havn't rooted.
Even more solution suggestions
Doesn't this bother anyone else ?

wifi has a bug in 6.X and its been talked about before.
my problem some times when i want to connect to another wifi it connects for a 1 sec and then drops it
i turn off wifi and back on and it will connect

i'm trying the app "Wifi roaming fix" but i think it causes the wifi to disconnect for a couple of seconds when it switches.

Strange that this seems to be of no interest to anyone. Is there indeed nobody who is using one or more WLAN APs in addition to his/her WLAN router? I can't believe that.

I have two APs (Main router and 2nd router as AP) but not for more coverage, my main router pushes 5GHz wifi, the second AP pushes 2.4GHz for older clients that can't connect to 5GHz
The 5GHz router is placed on a wall in the middle of the house and the entire house has great coverage so no need for more APs

I have more APs in my house with OpenWRT and 802.11r aka Fast Roaming configured and roaming between all my APs is working perfectly with all my devices.
Note 10.1 2014 Wifi, S7 Exynos and all other also.
With APs configured as "normal" ap with the same SSID and key i had the same issue as you mentioned.
I think your phone dont know that it could roam between your two APs.
If you could not run OpenWRT on your APs for 802.11r, you could try to enable WDS on both APs even if your APs connected by wire.

Android 9 (Oxygen 9.02) wifi keeps switching between 5ghz and 2.4ghz connection

Hey everyone,
So I've been expernecing this problem for over month. Basically im connected to my wifi on 2.4ghz and suddenly my connection will drop and I check that its now connecting to 5ghz but it doesn't actually connect to it its just keeps connecting and disconnecting every second until it finally connects back to 2.4ghz. And then after few minutes of strong connection ill drop again and same thing.
Im only experiencing this at work. There isn't 2 different ssid for 5ghz or 2.4ghz just one ssid, I was able to find out that they are using dual band router so I can't change anything the router part. is there an app or some setting I can toggle with to enforce 2.4ghz band only? Ive already turned off smart switch and scanning but problem still here.
Thanks in advance!!

Force wifi to connect to only 5ghz

i am using a router which broadcast both 2.4ghz and 5ghz band using single SSID. how do i force my phone to only allow to connect to the 5Ghz wifi network. i cannot turn off the 2.4ghz band as there are other devices in my house that only support 2.4ghz or do i want to split the bands into 2 SSID.
Thank you.

i was able to split my router to 2 different SSID for both bands

In the past there used to be an option in advanced wifi settings that made the 5GHz "preferred" but Google took it out for some reason.
The disabling of the 2.4 GHz or having 2 separate SSIDs might be the only way right now (not sure for a rooted phone tho)
Sent from nowhere over the air...

Yes not sure why did Google remove that option. Any hidden secret code i.e. *#00*# etc that allowed us to make changes to network setting.

Some routers have band steering which will force devices to 5ghz if supported while keeping 2.4ghz for devices that can't.
Sent from my SM-N986U using Tapatalk

I turned off Auto Connect on my 2.4ghz, so it stays on 5ghz all the time.

Eagle 3 said:
I turned off Auto Connect on my 2.4ghz, so it stays on 5ghz all the time.
Click to expand...
Click to collapse
Mine only 1 ssid for both band. Seem like there is no solution and i had to split the bands into 2 ssid.

angka8 said:
Mine only 1 ssid for both band. Seem like there is no solution and i had to split the bands into 2 ssid.
Click to expand...
Click to collapse
I only have 1 ssid. Like I said, I turned off Auto Connect for 2.4ghz so it always stays on 5ghz.

Eagle 3 said:
I only have 1 ssid. Like I said, I turned off Auto Connect for 2.4ghz so it always stays on 5ghz.
Click to expand...
Click to collapse
thanks, but for me both the bands are broadcast into one SSID. which means i can only find one wifi connection and the wireless router will change the band connection based on the signal strength when i am moving around the house. it will change the connection to 2.4ghz when i am in some place where the 5ghz connection is weak. why i wanted to stay with 5ghz when the connection is weak because it give a much higher download/upload speed compare to the 2.4ghz connection which somehow got much weaker internet speed to the extent of unusable.

angka8 said:
thanks, but for me both the bands are broadcast into one SSID. which means i can only find one wifi connection and the wireless router will change the band connection based on the signal strength when i am moving around the house. it will change the connection to 2.4ghz when i am in some place where the 5ghz connection is weak. why i wanted to stay with 5ghz when the connection is weak because it give a much higher download/upload speed compare to the 2.4ghz connection which somehow got much weaker internet speed to the extent of unusable.
Click to expand...
Click to collapse
Buy a new router where you can separate them and then disable or turn off the 5ghz connection

Looks like this is quite an issue for N2Us. I have a 4 year old iphone and it stays connected to 5GHz in the same place and N2U reverts to 2.4. I have band steering and have been really well on all other devices. Issue lies only with N2U.

Snowleopard1900 said:
Buy a new router where you can separate them and then disable or turn off the 5ghz connection
Click to expand...
Click to collapse
Mine can separate them but since it is only affecting my phone, I hope the change can be on the phone instead. By separating them, I will need to configure all those devices that can only connect to 2.4ghz. e.g. ring peephole

Did you solve issue? Same problem here :/

Eagle 3 said:
I only have 1 ssid. Like I said, I turned off Auto Connect for 2.4ghz so it always stays on 5ghz.
Click to expand...
Click to collapse
Errr...you actually DON'T have one SSID but 2. The band is appended on the name and they are actually 2 different WiFi networks with different names so you could turn off auto-connect on the 2.4GHz one

I use the Wireless Mac Filter on my router to block 2.4Ghz Band for my phone mac address, so the phone can only connect to 5Ghz

If you are using a Samsung phone in the advanced settings for wifi, turn off use randomised MAC address and use the phones actual MAC. This fix has been tested on Netgear routers and works, phone will join the faster 5ghz and still be able to switch to 2.4 if you are at a distance from the router

SenatorDC said:
If you are using a Samsung phone in the advanced settings for wifi, turn off use randomised MAC address and use the phones actual MAC. This fix has been tested on Netgear routers and works, phone will join the faster 5ghz and still be able to switch to 2.4 if you are at a distance from the router
Click to expand...
Click to collapse
Thanks, this worked with Pixel 4a on ruckus WiFi as well!

angka8 said:
i am using a router which broadcast both 2.4ghz and 5ghz band using single SSID. how do i force my phone to only allow to connect to the 5Ghz wifi network. i cannot turn off the 2.4ghz band as there are other devices in my house that only support 2.4ghz or do i want to split the bands into 2 SSID.
Thank you.
Click to expand...
Click to collapse
This is what i did .
(It might give you an very easy option /idea .)
My current setup is a Nokia fibre router that has 2.4 ghz and 5 ghz bands
I bought a reasonable priced wifi mesh 'TP DECO M4 "then
connected it to my fibre router ( ethernet cable )
The TP wifi mesh comes with an Android app fo configure it (settings )
All i did was swicth off the 2.4 ghz band in app, for my TP decom 4 model .
So if i wand to use only 5ghz i connect to my TP DecoM4 ( which is connected to my Nokia fibre router)
My othe devices( that only use 2.4 ghz bands ) i connect dirrectly to my Nokia fibre router, that has 2.4ghz band active ...and also the 5ghz ,
So fo me its a matter of to switch 2.4 ghz on and off in the Android TPlink app .
Hope this give you an very straightforward option ?
good luck
see screenshots below

Hi...
I don't if you already solved you problem but, probably, if you have router which broadcast both band with the same SSID you have option, in router settings, called SMART CONNECT set to the "ON"...

I found a solution that worked for me, i am using a xiaomi router and a s21
Samsung S21 Ultra 5G not connecting to 5Ghz wifi channel
Hi folks . I have a Samsung s21 ultra 5g. I can connect to the 2.4ghz WiFi but more than often I can't seem to connect to the 5ghz wifi channels .I'll have my laptop right infront of me onnected to the 5ghz wifi channel , yet my phone won't be able to the same. My router is netgear nighthawk...
eu.community.samsung.com
"in the settings of your phone / Connections / Wifi / settings of your network put:
IP-DHCP Settings
Phone MAC-MAC address type"