Develop Bugs

[Q]5Ghz Wifi?

Anyone been able to connect to a 5GHz WiFi network witht the Galaxy Nexus?
Forcing the "Wi-Fi Frequency band" setting to 5GHz only just results in an empty list of available networks, despite the phone being sat underneath a very decent enterprise-grade dual band AP (Ruckus 7363, Atheros chipsets). Have tried a bunch of different channels on the Ruckus AP (in both the 36-64 and 100-136 range) and switched between 20 and 40Mhz channel widths to no avail.
As far as I can tell, the Galaxy Nexus uses a BCM4330 chipset should have a 5GHz amp, would be ashame if there's no 5GHz antenna for it?!
Chris.

My bad. Think I was changing channels on the wrong AP when testing out 5GHz earlier.
The Galaxy Nexus does indeed support 5GHz, albeit on a limited number of channels (connecting at a 65MBps maximum datarate):
36
40
44
48

Just to finish up on this: After a bit of testing with an iPhone 4s (which also uses the same BCM4330 chipset and has no problems with any 5GHz channels), I'd guess that the GN's apparent limited support for 5GHz wifi is down to a software issue.
Basically the channels it supports are the ones that don't require DFS (Dynamic Frequency Selection) to be enabled on the AP, for use in the US (Europe apparently doesn't care about DFS).
I'd guess that the driver as is doesn't support interop with DFS (which I'd assume should be an AP-side function anyway) and rather than trust me that I'm in Europe, it just prevents those channels from being used.
Ashame, as it means 5GHz support is basically broken when it comes to using it with 'enterprise-grade' kit (not sure if consumer APs generally support DFS or not).

it should work with 5 Ghz WiFi
even the SGS2 works with 5 Ghz WiFi
at home i can connect using my 5 Ghz WiFi

chriscole said:
Just to finish up on this: After a bit of testing with an iPhone 4s (which also uses the same BCM4330 chipset and has no problems with any 5GHz channels), I'd guess that the GN's apparent limited support for 5GHz wifi is down to a software issue.
Basically the channels it supports are the ones that don't require DFS (Dynamic Frequency Selection) to be enabled on the AP, for use in the US (Europe apparently doesn't care about DFS).
I'd guess that the driver as is doesn't support interop with DFS (which I'd assume should be an AP-side function anyway) and rather than trust me that I'm in Europe, it just prevents those channels from being used.
Ashame, as it means 5GHz support is basically broken when it comes to using it with 'enterprise-grade' kit (not sure if consumer APs generally support DFS or not).
Click to expand...
Click to collapse
Hmmm...there's something odd going on with my GN with 5Ghz Wifi - I have a couple of Netgear routers 802.11N running on channels 36 and 44 and the GN connected no problems for the first few hours, but now it just won't grab an IP address. I've resorted to the G channels on 2.4Ghz, but have no idea why the handset suddenly won't pick up an IP on the 5Ghz even though I'm getting 'excellent' reception.
Any ideas? I've rebooted the phone and the network. The Mac and the iPad are the other devices on the 5Ghz and they're fine...

chriscole said:
I'd guess that the driver as is doesn't support interop with DFS (which I'd assume should be an AP-side function anyway) and rather than trust me that I'm in Europe, it just prevents those channels from being used.
Click to expand...
Click to collapse
Have you check if it's not just your Regulatory domain settings that are wrong? I don't have a GN yet so I can't check but used to be under Advanced in Wifi settings.

chingf0rd said:
Hmmm...there's something odd going on with my GN with 5Ghz Wifi - I have a couple of Netgear routers 802.11N running on channels 36 and 44 and the GN connected no problems for the first few hours, but now it just won't grab an IP address. I've resorted to the G channels on 2.4Ghz, but have no idea why the handset suddenly won't pick up an IP on the 5Ghz even though I'm getting 'excellent' reception.
Any ideas? I've rebooted the phone and the network. The Mac and the iPad are the other devices on the 5Ghz and they're fine...
Click to expand...
Click to collapse
Works fine on my Netgear WNDR3700, weird.

animaleyes76 said:
Works fine on my Netgear WNDR3700, weird.
Click to expand...
Click to collapse
It's very strange (I've got older DNDR3300 and WNDR3300 in the house) - it can see the SSIDs for 5Ghz, but just won't allocate me an IP address...I've looked at the wifi diagnostics through the *#*#info#*#* and there's nothing I can really do. I'm taking the thing back to '3' tomorrow.

chingf0rd said:
It's very strange (I've got older DNDR3300 and WNDR3300 in the house) - it can see the SSIDs for 5Ghz, but just won't allocate me an IP address...I've looked at the wifi diagnostics through the *#*#info#*#* and there's nothing I can really do. I'm taking the thing back to '3' tomorrow.
Click to expand...
Click to collapse
have you tried allocating it an ip address manually in the router, basically forcing dhcp to allocate a specific one? Did you try connecting with no encryption as well (def worth a go)

animaleyes76 said:
have you tried allocating it an ip address manually in the router, basically forcing dhcp to allocate a specific one? Did you try connecting with no encryption as well (def worth a go)
Click to expand...
Click to collapse
Yup - did all that. turned off encryption, added guest networks, turned off DHCP and entered manual IPs. The GN picks up the G and obtains the IP address no problem, but it just won't with the N...

chingf0rd said:
Yup - did all that. turned off encryption, added guest networks, turned off DHCP and entered manual IPs. The GN picks up the G and obtains the IP address no problem, but it just won't with the N...
Click to expand...
Click to collapse
Bummer. assumed you would have had done all that..

Just to add to the body of knowledge surrounding this. I have an Airport Extreme (Gen2), which had a recent firmware upgrade. This set it's automatic channel selection to use channel 100 - which my GN could not see. It took a downgrade from 7.6 to 7.4.2 for it to use channel 36 - and now I'm happy and connected. (I have other b/g APs in the house, but its nice to be on the fastest!)

clotheyes said:
Just to add to the body of knowledge surrounding this. I have an Airport Extreme (Gen2), which had a recent firmware upgrade. This set it's automatic channel selection to use channel 100 - which my GN could not see. It took a downgrade from 7.6 to 7.4.2 for it to use channel 36 - and now I'm happy and connected. (I have other b/g APs in the house, but its nice to be on the fastest!)
Click to expand...
Click to collapse
Was it a case that the GN could not see your network at all before?
I mean, my GN can 'see' the N networks, it just won't grab an IP - it just says 'Saved, secured WPA2 etc...' and will not obtain an IP.
I'm gonna replace the handset soon anyway with the volume 2g problem.

For reference: The 5Ghz spectrum isn't required to use N-based routing. It'll give you a bit more distance and speed, but not very much (think in the range of an extra ~10%). It's a misconception that 5Ghz is the only way to use the N-band.
As far as distance goes, that shouldn't really matter for your phone unless you're on the absolute fringe of the range. As for speed, you'll absolutely never notice a difference using a phone. The only time you'd notice a difference in speed is when transferring large files from computer to computer (or if your data connection is upwards of 25Mbps, but this wouldn't matter for the phone, either).

OK, if this is just for reference, we'd best get it right ;-) All slightly off topic, but it goes someway to explaining why having the GN support for all the 5GHz channels would be useful.
Signal propagation at 5GHz is generally worse than at 2.4GHz. All other things being equal (xmit power, antenna gains, interference, etc) a 5GHz signal will actually have less range than a 2.4GHz one.
The 2.4GHz/5GHz issue isn't so much about range or relative throughput in the best case scenario. It's about the worst case scenario - what happens to your speed when there's interference.
The 2.4GHz band has three, useful, non-overlapping 20MHz channels (1,6 and 11). 5GHz has around 19 non overlapping 40MHz channels (of which the Galaxy Nexus supports a measly four) *and* a scheme for dynamically avoiding interference on-the-fly (DFS).
This translates into significantly more stable performance on 5GHz compared to a congested 2.4GHz band (as it is in most built up urban areas - eg I see about 30APs broadcasting on 2.4Ghz now from my home in central London).
TLDR; If you live in a field - 2.4GHz is fine. If you live in a city, 5GHz is the future.
I'd suggest the following for a good bit of background on WiFi, along with some useful benchmarks showing just why most domestic APs/Wifi routers are crap in any case:
http://www.tomshardware.com/reviews/wi-fi-performance,2985.html
http://www.tomshardware.com/picturestory/571-wi-fi-beamforming-networking.html

Setting my Linksys 610 DDWrt router to channel 36 with a channel width of 40MHZ did the trick. Thanks!

chriscole said:
The 2.4GHz band has three, useful, non-overlapping 20MHz channels (1,6 and 11). 5GHz has around 19 non overlapping 40MHz channels (of which the Galaxy Nexus supports a measly four) *and* a scheme for dynamically avoiding interference on-the-fly (DFS).
Click to expand...
Click to collapse
Does anyone know if the "measly four" is a mistake by the firmware, a regulatory thing or just a hardware limitation?
My router performs best at channel 161 (it's a DD-WRT firmware thing) which means I can't see it on my phone, but I'm fine to access it on both my netbook and laptop.

Just want to thank the OP for this truly excellent thread. I also uncovered that the GN can also connect to the UNII-3 and the 5.8 ISM bands (channels 149-165), which are also non-DFS.

BinkXDA said:
Just want to thank the OP for this truly excellent thread. I also uncovered that the GN can also connect to the UNII-3 and the 5.8 ISM bands (channels 149-165), which are also non-DFS.
Click to expand...
Click to collapse
Seconded, I must have missed this post originally. I was pleasantly surprised to find that my GN connected to my Linksys E3000 running DD-WRT on channel 161 (40 MHz width).

chriscole said:
My bad. Think I was changing channels on the wrong AP when testing out 5GHz earlier.
The Galaxy Nexus does indeed support 5GHz, albeit on a limited number of channels (connecting at a 65MBps maximum datarate):
36
40
44
48
Click to expand...
Click to collapse
Thank you very much. Simple, concise, worked perfectly. Cheers mate.

[Q] Loss of 802.11a (5ghz) after i747UCLH9 OTA

I am new to the GS3 on AT&T (or will be when it gets here in the mail, yahoo!!).
I have been a Droid X user for 2+ years, on the Verizon network.
Jumped ship over to AT&T for discount reasons, and decided on the GS3. Wife's arrived last yesterday... horrible WiFi connection issues on our network, but the GS3 would identify both the 2.4 ghz and 5 ghz networks from our Netgear router.
After beating my head agains the wall, I ran the UCLH9 OTA update and if fixed the wifi issues, but all we can see is the 2.4 ghz network, and not the 5 ghz anymore.
Any ideas? Thoughts? Discussion?

More of a though than a solution, but maybe they decided to remove the 802.11a functionality from the radio since it is an antiquated standard, not to mention 802.11g for all intensive purposes is exactly the same only on the 2.4Ghz frequency. This could have also been handed down from higher up, from the IEEE or even FCC to make room on the 5Ghz band for new technology. New technology such as 802.11n which runs on both 2.4 and 5Ghz, i'm going out on a limb and guessing your router ins't wireless N capable or you would probably see this. There is also a new wireless standard in development (802.11ac) which will be exclusively on 5Ghz. Spectrum is like land, they* quit making it long ago...the only way to move forward is utilize what is there better and tear down the old stuff in favor of the new.
* I use the term 'they' vaguely, i'm not here to start a theological debate.

I believe our router (Netgear WNDR3700 Dual band) has both. I have a dell laptop that 'sees' both the 2.4 ghz and 5 ghz SSID's. So I'm relatively sure the router has both.
I was unaware that N technology runs on both the 5 ghz and 2.4 ghz simultaneously. I'll have to look into this to see if this is related.
The loss of detecting the 5 ghz still makes me go hmmm?
Thanks for the reply.

The router you listed is an N capable router, why your phone isn't seeing the 5ghz band i'm not sure. As my signature shows im running AOKP and the KT747 kernel which uses different wifi drivers. I currently don't have a wireless N network thanks to some lightning earlier this year to check, but i can say i've never had any problem with connecting to any wifi networks. I would start with the router and check the settings there as to how the network broadcasts, what frequencies its on etc. I have had problems in the past with running on the 20/40z frequencies so you might change that to 20 exclusively and see if that helps you.

[Q] Nexus 7 (2013) wifi speeds / which router do you have

Hi everyone,
I have my Nexus 7 connected to a Linksys WRT160N router with tomatoRAF firmware installed. This router+firmware+configuration setup was the best I could do without constant dropping of connection or not connecting at all, but still at very slow speed of 0,5 - 1,5 MB/s (average is more around 0,6) when copying files on local network (SMB) with ES File Explorer. Which is good enough for web surfing and emails, but not enough for IPTV and youtube (youtube works, but i have to wait for it a lot).
So far i have tried numerous configurations of my router, nothing works. I tried other routers, 9 to be exact, but i have never seen more than 2MB/s.
Now i'm thinking about buying new router, and I want to know what wifi speeds do you get with which router.
thanks

Hi,
what's your net speed? mine is 26 mbit/s and this is what i get. however, IF you stream sound with BT/have any BT service up and running and your wifi runs at 2.4ghz it is highly probable the two (bt and wifi) interfere. This was the problem i had and which i found out after buying soundbar which links with its subwoofer via BT(BT butchered my wifi, i was scoring 1mbit to up to 26). I have switched to dual band modem/router (tp link td-w8980). now, i have two WiFi networks at my place, one which runs at 2.4ghz and the second at 5ghz. the 5ghz is used only by my nexus :]

N7 2013, Buffalo N300 router, Verizon FiOS 75/25. The router is dual channel, but not dual band: 2.4GHz only.
Sent from my Nexus 7 using XDA Premium 4 mobile app

enlev said:
Hi everyone,
I have my Nexus 7 connected to a Linksys WRT160N router with tomatoRAF firmware installed. This router+firmware+configuration setup was the best I could do without constant dropping of connection or not connecting at all, but still at very slow speed of 0,5 - 1,5 MB/s (average is more around 0,6) when copying files on local network (SMB) with ES File Explorer. Which is good enough for web surfing and emails, but not enough for IPTV and youtube (youtube works, but i have to wait for it a lot).
So far i have tried numerous configurations of my router, nothing works. I tried other routers, 9 to be exact, but i have never seen more than 2MB/s.
Now i'm thinking about buying new router, and I want to know what wifi speeds do you get with which router.
thanks
Click to expand...
Click to collapse
I had throughput issues with a Linksys WRT54GL and Tomato, was not a configuration problem. Loved the way Tomato worked, how it looked, it's options... but in the end, all I really cared about was throughput. Are you able to replicate the throughput issue on stock router firmware? You said you tried other routers. All the same model (RMA)?
Tell me more about your connectivity issues.
If you've used different routers from different manufacturers (with their respective stock firmware), then it's probably a problem with your tablet.

Aerowinder said:
I had throughput issues with a Linksys WRT54GL and Tomato, was not a configuration problem. Loved the way Tomato worked, how it looked, it's options... but in the end, all I really cared about was throughput. Are you able to replicate the throughput issue on stock router firmware? You said you tried other routers. All the same model (RMA)?
Tell me more about your connectivity issues.
If you've used different routers from different manufacturers (with their respective stock firmware), then it's probably a problem with your tablet.
Click to expand...
Click to collapse
I had this throughput issue from the day I received my nexus 7 (2013), with stock firmware on router. But with stock firmware, the connection would drop randomly (from 5 minutes to 12 hours) and to reconnect i had to restart the router and nexus - this was corrected only with this firmware TomatoRAF (i tried dd-wrt and 2 more tomato firmwares - all kept disconnecting). I never had this throughput issue with any laptop, only this nexus.
The other routers i tried were all different routers, but all at least 3 years old.
Another information: friends nexus 7 (2013) WIFI, flo, also had same speeds on my router.
today i will try to test a few phones and a laptop on my router and will post results as soon as i can

32gb lte model, I use an Asus ac66u and Comcast 105\25 Mbps. 5ghz WiFi gets me 90 Mbps down and 22-30 up, 55 Mbps down and 22-30 up on 2.4 GHz.
Sent from my Nexus 7 using XDA Premium HD app

This is what i get (copying files from server with es file explorer):
nexus 7 2013 (kitkat) - 760kB/s
1st xperia ray (kitkat) - 750kB/s
2nd xperia ray (jellybean) - 530kB/s
xperia mini pro (jellybean) - 560kB/s
galaxy s4 mini - 1070kB/s
laptop - 6500kB/s
I used to get 10MB/s+ on my laptop with original linksys firmware, but now i configured router to be more "reliable" and i would be more than happy if nexus had 6,5MB/s connection.
I attached some info about router configuration. If there is an "expert" reading this willing to help, i can post more complete configuration.

DeathmonkeyGTX said:
32gb lte model, I use an Asus ac66u and Comcast 105\25 Mbps. 5ghz WiFi gets me 90 Mbps down and 22-30 up, 55 Mbps down and 22-30 up on 2.4 GHz.
Sent from my Nexus 7 using XDA Premium HD app
Click to expand...
Click to collapse
Are you happy with ac66u? any problems? what about lan to wifi speeds (with laptop/ac adapter)? i am asking as it is a serious contender for my next router

DeathmonkeyGTX said:
32gb lte model, I use an Asus ac66u and Comcast 105\25 Mbps. 5ghz WiFi gets me 90 Mbps down and 22-30 up, 55 Mbps down and 22-30 up on 2.4 GHz.
Sent from my Nexus 7 using XDA Premium HD app
Click to expand...
Click to collapse
I think I hate you! Ok... maybe I'm just a little jealous!
enlev said:
Are you happy with ac66u? any problems? what about lan to wifi speeds (with laptop/ac adapter)? i am asking as it is a serious contender for my next router
Click to expand...
Click to collapse
Considering how inexpensive it was I"m extremely happy with the TP-Link WR1043ND that I use. With aftermarket antennas I bought as an experiment and the current firmware installed signal strength through walls and general performance is great. I thought about installing third-party firmware on it when I first got it a couple years ago but see no need. For the package I have from Comcast they advertise I think 25 Mbps down and 5Mbps up and I usually see 28/6. If you haven't already done so make sure your router is using the best channel for your location. Also, I see a lot of people move off of channels 1, 6 and 11 which can make them see/cause more bleedover from/to adjacent channels. You can see that in my screenshot with networks MercedesBenz and Sandvik. I live in a house but the effect in an apartment or condo would be worse. I also use a repeater because my router is at the opposite end of the house from my backyard patio and this house has insulated steel siding. Wifi Analyzer is a free app and works great to figure out what channel would work best for you.
Also in the N7's wifi advanced settings I use "2.4 GHz only" which seems to make it reconnect faster when waking up the device because I also use "only when plugged in" during sleep.

enlev said:
Are you happy with ac66u? any problems? what about lan to wifi speeds (with laptop/ac adapter)? i am asking as it is a serious contender for my next router
Click to expand...
Click to collapse
I haven't had any problems. All my large lan transfers are done over Ethernet cat 6. If it can pull down 90mbps from wan to wlan on two phones and a tablet, well then there's your sign lol. All these speeds are on n WiFi, I haven't even tried ac because all my machines that need all available bandwidth are hardwired. The router hasn't even required rebooting unless one counts firmware updates and such. Hardline lan to lan is right about 100 MB/s.there's an even faster model out called the ac68u but it's significantly more expensive.
Sent from my Nexus 7 using XDA Premium HD app

I have the 32GB LTE version... Using an Asus RT-N66U as my access point...
On 2.4 ghz I get 22.5 mbps down and 7.5 mbps up*
On 5 gzh I get 68.4 mbps down and 11.5 mbps up... which is the max speeds I see from my ISP.
*note: there are about 18 strong 2.4 ghz networks visible at my location (surrounded by apartment buildings). 2.4 ghz performance consistently suffers with this level of interference across all of my connected devices.
As far as the RT-N66U goes... I'm very happy with it's performance and range of signal. I was a long time WRT54G user with tomato. This matches almost perfectly.

Does Galaxy Note 2 support 5G wifi?

I bought a dual signal wifi router recently and was surprised that my note 2 can connect with 5G,but it is not stable. My rom is DN3 4.4.2. Does anyone can help?
thanks

Alexsandra said:
I bought a dual signal wifi router recently and was surprised that my note 2 can connect with 5G,but it is not stable. My rom is DN3 4.4.2. Does anyone can help?
Click to expand...
Click to collapse
My router is dual band and I have not noticed any instability. I have not tried fixing the connection to 5GHz only though. (It's an AVM 7390)
I may try later.

only the n standard, not the newest ac standard (which is wifi in the 5 GHz frequencies) as far as i know (and the spec sheets i looked up)
Routers are usually downwards compatible, so thats why your note can connect I think

Mine connects to the 5Ghz spectrum just fine, though it's worth remembering the range is severely crippled compared with 2.4Ghz

A70 wifi network speed

Is this max network speed for a70?
This is screenshoot form wifi settings.
On other phones i get 130mbps.

mine says 65. Ultra slow downloads. Heard some people talkin about using the 5 Ghz band of certain equipped routers or n band. It is just so slow downloading from my wlan I figured it must have something greater wrong with it. Like hackers again...who knows.

This is what mine says

On mine is 72mbps network speed and cant get over 49mbps download speeed on speedtest.net

433Mpbs on 802.11AC for me

I get a picture 130 mbps on my oreo device but both pie devices say 65 mBps.
My 1000/100/10 switch connects ethernet to various devices which easily shuttle the expected 80-130 actual MB/s around of large filetypes.
I don't have any sort of 5 Ghz router just the crappy device that the company sent out. And on that the MAC filter keeps getting disabled which increases my paranoia. Till 2 weeks ago I used the same crappy standard gateway/router for 6 years and frankly it was equal or better experience. At least that one started up reasonably fast. And its MAC filter was always on. But that could just indicate that the neighborhood brats had an easy backdoor to that one and didn't have to brute force off the MAC filter.
In my opinion the MAC filter getting disabled (now a few different times it has happened) indicatives a much much larger problem
I have been intending to get my own personal router for a while but there are too many options so I haven't had the scope to choose one yet.
Other phone in network displays 117mbps and is a Pie.

On same network 2.4ghz on s8,s7 i get 130mbps and on a70 72mbps max.
Just tried 5ghz on same network and got 150mbps it is a little faster.
But on 2.4ghz 72mbps is max.

hi guys
i have also same problem . cannot connect more than 72mbps , with 5ghz 150mbps max . something wrong but i could not find what is the problem .
you guys found any solution ?

mine has 72mb on 2.4 and 433mb on 5g...

Tactman said:
mine has 72mb on 2.4 and 433mb on 5g...
Click to expand...
Click to collapse
i think all a70 phones are like that

I just tested and got 158Mbs with a 5Ghz wifi connection, although only around 60Mps on 2.4Ghz.
Andre

I'll check mine later and see if I can figure out what's happening

Right next to the router I can see 96mbps in 2.4Ghz

Must be something wrong. I got 433mbps.

Nothing is wrong.
The Snapdragon 675 supports 2x2 chains on WiFi, but the A70 only has a 1x1 antenna so it connects at half the speed.
Link speeds on the A70 are as follows:
2.4 GHz = 72 Mbps
2.4 GHz (with 256 QAM) = 96 Mbps
5 GHz = 433 Mbps
On all devices with 2x2 on WiFi, the speeds above will be doubled on those.
These are in ideal network conditions with great signal strength and low interference. These numbers could reduce if you are far from the router.
This is not abnormal. A lot of mid-range devices only have 1x1 for WiFi.