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[Q] No 5ghz 802.11n after Jelly Bean update?

more information found... see additional notes later in this thread.
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Hi folks,
Just updated my P6210 to Jelly Bean (KIES_HOME_P6210XXMD3_P6210OXAMD3) and now it won't see any 5ghz wifi. Connects just fine to 2.4ghz. ICS had no problems seeing that there were 5ghz networks and connecting to them.
I've done a lot of searching and it looks like this issue has come up on other devices as well. People have recommended everything from doing a factory reset and suggesting it will start working again. I've also seen folks say this happens if you don't clear cache and factory reset before updating the firmware. Nothing has worked for me.
I've gone back and reloaded ICS and 5ghz immediately works again just fine, so the issue is obviously something to do with the Jelly Bean update or somewhere in how the update is loaded. I've just cleared cache/factory reset/updated to jelly bean again, and the 5ghz networks are gone again.
Apologies if a clear explanation is out there already; I haven't been able to find it.
Is anybody able to help me understand exactly what is going on and if it is possible to get the 5ghz wifi working under Jelly Bean on the P6210 without rooting the device?
Thanks very much for any help,
rjb

rjbeep said:
Hi folks,
Just updated my P6210 to Jelly Bean (KIES_HOME_P6210XXMD3_P6210OXAMD3) and now it won't see any 5ghz wifi. Connects just fine to 2.4ghz. ICS had no problems seeing that there were 5ghz networks and connecting to them.
I've done a lot of searching and it looks like this issue has come up on other devices as well. People have recommended everything from doing a factory reset and suggesting it will start working again. I've also seen folks say this happens if you don't clear cache and factory reset before updating the firmware. Nothing has worked for me.
I've gone back and reloaded ICS and 5ghz immediately works again just fine, so the issue is obviously something to do with the Jelly Bean update or somewhere in how the update is loaded. I've just cleared cache/factory reset/updated to jelly bean again, and the 5ghz networks are gone again.
Apologies if a clear explanation is out there already; I haven't been able to find it.
Is anybody able to help me understand exactly what is going on and if it is possible to get the 5ghz wifi working under Jelly Bean on the P6210 without rooting the device?
Thanks very much for any help,
rjb
Click to expand...
Click to collapse
What country are you in? The current update is a UK ROM, if you are in the US, it may not see all the wifi channels properly.

DigitalMD said:
What country are you in? The current update is a UK ROM, if you are in the US, it may not see all the wifi channels properly.
Click to expand...
Click to collapse
I am in the US and the device has been configured for US for language, etc... Wouldn't they all need to have visibility to all frequencies for when folks travel with their devices or is it generally accepted that WiFi may not work as expected when you travel abroad? I don't travel much so I have no experience with that.
Thanks very much for the response. I really have no idea if that might impact WiFi access.
When I initially updated from Honey Comb to ICS, it was a European firmware that was available first. I had no problems reaching 5ghz wifi with that firmware. I did eventually update again when the US firmware came out, however it was just because it was available and not to address any deficiencies.
So far... here's what I've used:
Honey Comb - Factory Installed - 5ghz & 2.4ghz worked
ICS - United Kingdom / Ireland - P6210XXLPN/P6210OXALPN - 5ghz & 2.4ghz worked
ICS - Cellular south - P6210UELPC/P6210XARLPC - 5ghz & 2.4ghz worked
Jelly Bean - United Kingdom / Ireland - P6210XXMD3/P6210OXAMD3 - 2.4ghz works but no 5ghz
ICS - Cellular south - P6210UELPC/P6210XARLPC - 5ghz & 2.4ghz worked again (downgraded)
Jelly Bean - United Kingdom / Ireland - P6210XXMD3/P6210OXAMD3 - 2.4ghz works but no 5ghz (even after clear cache/factory reset, etc.)
again... appreciate the thoughts.
rjb

more info: "WiFi 5ghz Auto (DFS) channel setting not compatible after upgrade to JB?
Update:
I poked around more and found
"Issue 37482:Galaxy Tablet ICS 4.0.4 Update Disables 5GHz Wifi"
(https://code.google.com/p/android/issues/detail?id=37482)
regarding the same issue but with ICS 4.0.4 on a what is only identified as a "Samsung Galaxy tablet"
There was a response noting a similar experience and suggesting that the OP change their 5ghz channel setting on their router from auto to 36 as this resolved the issue for the responding poster.
Well... it also worked for me.
So the issue now is redefined to:
"WiFi 5ghz Auto (DFS) channel setting not compatible after upgrade to Jelly Bean???"
The issue poster had this happen when they updated to 4.0.4 (albeit we have no idea what device they were using) while 4.0.4 worked fine for me. I run into the same issue when I update to 4.1.2.
Anybody have any idea what is going on here? Does anybody have one of these working with 5gh Auto (DFS)? Any guesses what would change between the 4.0.4 firmware and the 4.1.2 firmware for this device that would require a change to the wifi settings on the router?
Samsung Model GT-P6210MA w/ Jelly Bean 4.1.2
Cisco (Linksys) WRT610N w/ firmware 2.00.01
Router Config #1
5ghz Wireless Settings that don't work (P6210 doesn't even see the 5ghz network when scanning)
Network Mode: Mixed
Channel Width: Auto(20MHz or 40MHz)
Wide Channel: Auto (DFS)
Standard Channel: Auto (DFS)
SSID Broadcast: Enabled
Router Config #2
5ghz Wireless Settings that do work (P6210 sees the 5ghz network and connects just fine)
Network Mode: Mixed
Channel Width: 40MHz only (can't be auto if you want to select the wide channel)
Wide Channel: 38 (maybe others would work, too... haven't tested.)
Standard Channel: 36-5.180GHz (can't be left at auto once other parameters are changed)
SSID Broadcast: Enabled
I'd be interested in any explanation why this is happening. Thanks very much for any help.
rjb

DigitalMD said:
What country are you in? The current update is a UK ROM, if you are in the US, it may not see all the wifi channels properly.
Click to expand...
Click to collapse
It's not a router , or even software issue, its probably a parameter in the Android system/build.prop file that is hardcoded to GB or UK, since this is a UK release.. This would tell the drivers to use UK wifi channels instead of your chosen local. and NO the channels are not the same in the US as in GB/UK, some are the same and some are not the UK has several channels that are not used by US routers , not permitted by the FCC and vice versa..., That's why forcing your router to channel 36 or 1 might work while auto might not work or randomly might work depending on what channel your router finds is clear..
Remember these first single country releases by Samsung are done as really a test or beta. It helps find problems which will be fixed in the broader releases.

DigitalMD said:
It's not a router , or even software issue, its probably a parameter in the Android system/build.prop file that is hardcoded to GB or UK, since this is a UK release.. This would tell the drivers to use UK wifi channels instead of your chosen local. and NO the channels are not the same in the US as in GB, some are the same and some are not the UK has several channels that are not used by US routers , not permitted by the FCC and vice versa..., That's why forcing your router to channel 36 or 1 might work while auto might not work or randomly might work depending on what channel your router finds is clear..
Remember these first single country releases by Samsung are done as really a test or beta. It helps find problems which will be fixed in the broader releases.
Click to expand...
Click to collapse
gotcha...
Thanks for helping me understand what's going on here. Appreciate the help.

rjbeep said:
gotcha...
Thanks for helping me understand what's going on here. Appreciate the help.
Click to expand...
Click to collapse
No problem, If i were near a 5ghz router right now, I'd check it out and find the problem, but Im not.

I haven't experienced a problem yet running JB on the 6210 connected to the 5 GHz AP on my router.
Linksys E3000 running Tomato USB FW (Tomato Firmware v1.28.9054 MIPSR2-beta E3000 USB Ex)
2.4 GHz AP:
MAC Address 98:FC:11:7C:69:27
Wireless Mode Access Point
Wireless Network Mode Auto
Radio Enabled
SSID bwifinet
Security WPA2 Personal (PSK) + AES
Channel 11 - 2.462 GHz
Channel Width 20 MHz
Interference Level Acceptable
Rate 72 Mbps
5 GHz AP:
MAC Address 98:FC:11:7C:69:28
Wireless Mode Access Point
Wireless Network Mode N Only
Radio Enabled
SSID bwifinet5G
Security WPA2 Personal (PSK) + AES
Channel 64 - 5.320 GHz
Channel Width 40 MHz
Interference Level Acceptable
Rate 108 Mbps
You could try installing and playing around with the Wifi Analyzer app on your tablet to see what channels are best, available, etc.

[/COLOR]
k_t_b said:
I haven't experienced a problem yet running JB on the 6210 connected to the 5 GHz AP on my router.
You could try installing and playing around with the Wifi Analyzer app on your tablet to see what channels are best, available, etc.
Click to expand...
Click to collapse
Like I said, if its a hard coded parameter in one of the build files, like build.prop... it will tell the drivers to use a UK configuration in which case they will not even see some US channels. It won't matter what you set your locale in settings to... For example US uses 802.11G channels 1-11 only whereas other parts of the world use additional channels up to 14. Same applies to 5ghz, so it could randomly work or not work depending on what channel your Wifi router happened to working on. And if you Wifi AP is doing auto channels, it could work today and not tomorrow.
See here for additional info
http://en.wikipedia.org/wiki/List_of_WLAN_channels 2.4ghz
http://www.digikey.com/us/en/techzo...erence-between-24-ghz-5-ghz-wireless-lan.html
5 ghz

[Q] Galaxy Note Pro 12.2 WiFi Connection Problem

Hi All, I've bought one of these beauty's and am well pleased with it. However I have come across a small but annoying problem that I hope someone can help me out with.
At initial set up I connect to my home network. This works absolutely fine. When I set the tablet to connect to my tethering hotspot on my S4 that is when problems occur. It connects initially but then shows disabled. The same now happens with the home network. The home network is via a HH5 which has both 2.4GHz & 5GHz. enabled. Telling the device to forget each of the AP's and reconnecting them does not work. Other devices (W7 PC's, the telly & another S4 ) can connect to my tethering hotspot without any problem.

My Sitecom Router did this, I had to disable OPS on it and do a hard reboot on the router. Give that a try.

I have the same problem...continue disconnection and reconnection...help me!!!

Try switching the channel. Use this APP to find the best one: https://play.google.com/store/apps/details?id=com.farproc.wifi.analyzer

For me, adding the Note to the static DHCP List in my router settings (trendnet TEW-652 BRP) seemed to do the trick. Some people also recommend changing 802.11 mode to single (g or n) as opposed to mixed (g and n), and changing IP to static in the Note Wi-Fi settings.
... Note Pro 12.2 (900) ...

I have the same problem
tierrebi said:
I have the same problem...continue disconnection and reconnection...help me!!!
Click to expand...
Click to collapse
I have the same problem. I tried adding DHCP and all the other suggestions. None of them is solving the problem.

zubazuba said:
I have the same problem. I tried adding DHCP and all the other suggestions. None of them is solving the problem.
Click to expand...
Click to collapse
I had to change the broadcast channel on my hotspot to 2.4GHz to get the Galaxy Note Pro 12.2 to see the WiFi network.

Mine's doing same thing. Turn off DHCP in wifi settings of 12.2 Pro and use a Static IP way the hell up there on the range so one of your dynamic devices doesn't grab it.
This tablet is such a piece of crap. Been trying to sell it forever. Definitely the worst display on any of the newest-generation Samsung devices. Plus it has these retarded problems with completely rudimentary technologies.

[Q] No 5ghz wireless detection with Lollipop

Hi all,
Strange problem following my OTA lollipop update yesterday. My (UK WIFI version) Shield tablet is unable to detect my router's 5ghz signal. Kit Kat had no problems and all my other devices can still see it fine. I have also tried changing the settings on my router to see if Lollipop is more fussy about frequency/band etc, but still no joy
Anyone else having strangeness with this? Or is it just me?

ClownShoes said:
Hi all,
Strange problem following my OTA lollipop update yesterday. My (UK WIFI version) Shield tablet is unable to detect my router's 5ghz signal. Kit Kat had no problems and all my other devices can still see it fine. I have also tried changing the settings on my router to see if Lollipop is more fussy about frequency/band etc, but still no joy
Anyone else having strangeness with this? Or is it just me?
Click to expand...
Click to collapse
I flashed the US ROM last night, and during setup it took maybe an additional 20 seconds before the 5ghz routers (including mine) to show up in the list. 5ghz has always been kinda weird for me though. On a few occasions I've had to disable WiFi, wait 10 seconds, then restart so that the tablet will connect.

I also have the UK wifi version, and my tablet even connected first to the 5ghz network, I was actually surprised.

No issues here with 5ghz wireless.

pyro9219 said:
I flashed the US ROM last night, and during setup it took maybe an additional 20 seconds before the 5ghz routers (including mine) to show up in the list. 5ghz has always been kinda weird for me though. On a few occasions I've had to disable WiFi, wait 10 seconds, then restart so that the tablet will connect.
Click to expand...
Click to collapse
flakz0r said:
I also have the UK wifi version, and my tablet even connected first to the 5ghz network, I was actually surprised.
Click to expand...
Click to collapse
Thanks guys,
It's very odd, because I run wifi analyzer at home and it doesn't show my 5ghz network at all, yet in the office it does show the 5ghz one.
It was working before the update and all my other devices can still connect fine, so a real mystery

NZtechfreak said:
No issues here with 5ghz wireless.
Click to expand...
Click to collapse
Thanks. Does sound like just me then

Reboot the router?

I'm having this issue with my Nexus 4: http://forum.xda-developers.com/nexus-4/help/lollipop-5ghz-wifi-t2945330

Upon further inspection, it appears the only 5ghz channels that work are the first couple in band A (36 - 48) Nothing else seems to work.
Can anyone else confirm this behaviour? Try using a 5ghz channel other than 36 - 48
Band A : 5150 - 5350 MHz (channels 36 - 64)
Band B: 5470 - 5725 MHz (channels 100 - 140)
This is pretty rubbish if this is the case, as the band B channels allow a higher output and give me a much stronger signal in my house

ClownShoes said:
Upon further inspection, it appears the only 5ghz channels that work are the first couple in band A (36 - 44) Nothing else seems to work.
Can anyone else confirm this behaviour? Try using a 5ghz channel other than 36 - 44
Band A : 5150 - 5350 MHz (channels 36 - 64)
Band B: 5470 - 5725 MHz (channels 100 - 140)
This is pretty rubbish if this is the case, as the band B channels allow a higher output and give me a much stronger signal in my house
Click to expand...
Click to collapse
I can only connect when I use channels 36-48, Band A UNII 1. Can't even detect the AP with WiFi Analyzer on the shield if I go above 48.
Using the non-US 32GB LTE version in the EU, btw, same frequencies are allowed here as in the US.

debunk said:
I can only connect when I use channels 36-48, Band A UNII 1. Can't even detect the AP with WiFi Analyzer on the shield if I go above 48.
Using the non-US 32GB LTE version in the EU, btw, same frequencies are allowed here as in the US.
Click to expand...
Click to collapse
Sorry, you're right 48 does also work.
So that's confirmed then, they have for some reason heavily limited the 5ghz channel selection! I wonder why?
It's not a hardware limitation as it was working fine with KitKat, so I wonder whether it's possible to get the other channels unlocked?

Just to be sure, ClownShoes, does channel 140 work for you? I can't test this because my fritzbox router doesn't have an option to change channel width to 20MHz, and channel 140 isn't available to me for this reason.

Same problem for me here. No 5ghz detected when my Xperia Z1 Compact detect it . Even Wifi Analyzer can't see it . I restarted my tablet & stuff, nothin' . I'll try to make a nandroid backup, make a fresh install and I will see the result.

Same problem for me here with my samsung galaxy note 3 32 gb(sm-n9005). If I restart router phone view and connect to 5 GHz. When phone leave coverage are for same hours when come back don't see 5 Ghz wireless. This is strange because I have another phone with windows which work perfect. I will try to change wireless channel if don't work, I thing serious to go back at android 4.4.2
Update: I changed channel from auto to 48 and works.

Just dropping in to say I had the same issue: I had my router on channel 112 and the Tablet wasn't even seeing it.
Switched to 48 and everything works fine now.

Same issue here, hoping Android 5.1 fixes this silly issue. I was wondering why i couldnt see the 5Ghz network at channel 140, 80mhz. had to bring it down to channel 48.

US wifi version here. 5.1 Lollipop, stock rooted.
I can connect to channel 149 with turbo mode (40MHz channel width) & the upper Extension channel, but WiFi analyzer shows my router is broadcasting on channel 153. I tried so many other channels & combinations but this is as high up as I could go & have the tablet connect. It did, however, see channel 161 but got an authentication error & wouldn't connect with the router.
So, back to 149. The signal is slightly stronger & have better throughput than channel 48!
On a side note...I use 5GHz here in this LARGE apartment complex because everyone here is on Verizon FIOS or Cox Communications, so Wi-Fi Analyzer sees 17 (give or take a few for signal strength or weakness) access points around my place & the 2.4 band is completely choked up! There is only 1 other router close by on 5GHz, so using that band is the only option for wireless internet here. I don't use Verizon's wireless AP. They only have 2.4 wireless, no 5. My Netgear simultaneous dual band router is plugged into the back of their cable modem & my Netgear is on 192.168.2.1. That way I can use DD-WRT & my own router instead of theirs for wireless. Easy-Peasy!:good:

I have the same issue. After switching my channel from 100 to 40 the 5GHZ wifi showed up on (two) shield tablets just fine

I believe the SHIELD Tablet only supports United States Non-DFS channels, so 36-48 and 149-165. I personally have mine on Channel 149 and 80MHz bandwidth.

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 Keeps Dropping on the NEW Pixel 2

I just got my pixel 2 today and whenever I'm connected to my wifi it keeps dropping. My S7 is perfectly fine tho. Has anybody found a solution to this issue?

I've had this from time to time. Do you know what channel your router is on? I've seen 5ghz channrls which work on some devices but not others. Some routers will scan for available frequencies and pick one. 802.11ac allows for the bonding of multiple 5ghz channels (in groups of 4), one of those will be the primary channel. Depending on which it picks will determine if a device is compatible.
I normally end up turning scanning and auto channel off on the router and picking a known default (5180) for instance. No idea if this is your issue though.
Sent from my Pixel 2 using Tapatalk