Develop Bugs

[Q] Slow wifi on CM9

Yesterday, i have unlocked and rooted my phone to put CM9 nightly on my galaxy nexus[GSM]. Everything works fine but i have one issue, the wifi speed is really slow on my phone.
this is the rom that i flashed on my phone.
http://forum.xda-developers.com/showthread.php?t=1398495
I have tested on speedtest.net and i am getting less than 0.5mpbs. I have looked over my router and other devices, they are getting 5mpbs. Is this an issue with CM9? On stock settings for the nexus i get 5mpbs.
Is there a fix around this?

What is your broadband connection rated at? 5/10/15/20...mbps? If you are rated at 15 or 20 and your only getting 5 on other devices you could have a router issues.
Does the speed get any better when you are within 5 feet of the router?
Do you have multiple Wireless Routers/AP's?

there is no difference if i am beside or 20 feets away from it. I still get less than 0.5 mpbs. There was no issue when i was using the stock version of GNexus 4.0.2.
I only have one router.
I have managed to fix the problem, can a mod please delete this thread?

I have the same problem. When I restore back to stock, the problem goes away. I do have the FD01 radio firmware installed.
Sprint GN, Tapatalk2

DTMLY said:
there is no difference if i am beside or 20 feets away from it. I still get less than 0.5 mpbs. There was no issue when i was using the stock version of GNexus 4.0.2.
I only have one router.
I have managed to fix the problem, can a mod please delete this thread?
Click to expand...
Click to collapse
How did you fix it? You could at least share it with all the people who tried to help

Hi folks
I was having the same problems. I just upgraded to 9-20120511-NIGHTLY-maguro and my wifi issues have gone.
Sent from my Galaxy Nexus using xda premium

Try rebooting your router. I've been using CM9 for weeks now and the only time I've had issues were with my router.
This isn't even the fastest.. just a random test. CM9 Nightly 5/11.
Sent from my Galaxy Nexus using Tapatalk 2

NCguy said:
How did you fix it? You could at least share it with all the people who tried to help
Click to expand...
Click to collapse
I have the same problem after I assigned my phone a static IP on my home router. Search on MAC randomization for this issue. There are several kernels that fix this. I believe Franco, Trinity, and Imoseyon will work. I wish the stock cm9 kernels would get fixed for this issue.
Sprint GN, Tapatalk

Do you have some sort of QoS setting on your router keeping it from providing the speed to certain devices or something like that? I agree with the others, first thing I would do is factory reset my router.

Having a similar issue my epic is doing 25mbps on a 30mb line but both of my gnexs on different roms are only getting g 10-12????
Sent From My Sprint Galaxy Nexus via XDA Premium

I've also noticed that my Wifi performance is seriously degraded and very slow. At first I thought it was my connection, but further testing narrowed the issue to my Gnex only. I get very long 1000+ms ping times using the speedtest app and get a stuttery 1-2mb/s down and up, when every other device in my house (6+) is showing upwards of 20mb/s down and 2mb/s up. I have replicated the horrible ping and download times from various wifi hotspots.
To test further, I reverted to a backup nightly with no change. I went back as far as my 04/29 build and the problem remained. Maybe I just didn't notice it before, but I'm not certain. I have even flashed other ROMs such as AOKP and speedtest showed superfast results.

bryanus said:
To test further, I reverted to a backup nightly with no change. I went back as far as my 04/29 build and the problem remained. Maybe I just didn't notice it before, but I'm not certain. I have even flashed other ROMs such as AOKP and speedtest showed superfast results.
Click to expand...
Click to collapse
Wonder what AOKP did to it because myself and many others finds wifi to suck on the stock roms.

The wifi problem goes away when i use a kernel that addresses MAC randomization.
Sent from my Sprint Galaxy Nexus CDMA using Tapatalk 2

Figured out the cause of the slow wifi
I found out what the issue was with my wifi slowness and awful ping times.
I re-installed the latest Nightly and this time I did a "wipe data" (wiping out all of my apps) and my speedtest results were awesome again. Essentially a clean install. After reinstalling my apps one by one, I've been running speedtest each time and found that Doubletwist/Airsync was the cause of my slowness. Uninstalling DoubleTwist/AirSync and then rebooting fixed the speed/ping issue right away. HTH.

bryanus said:
I found out what the issue was with my wifi slowness and awful ping times.
I re-installed the latest Nightly and this time I did a "wipe data" (wiping out all of my apps) and my speedtest results were awesome again. Essentially a clean install. After reinstalling my apps one by one, I've been running speedtest each time and found that Doubletwist/Airsync was the cause of my slowness. Uninstalling DoubleTwist/AirSync and then rebooting fixed the speed/ping issue right away. HTH.
Click to expand...
Click to collapse
You could also try AirDroid (https://play.google.com/store/apps/details?id=com.sand.airdroid) as an alternative to upload/download files to your phone.
Works great for me ^_^

[SOLVED] WiFi issues with AOKP/CM10 etc etc

Well, this is interesting and so far NO ONE has been able to resolve my issue in regards to this.
Any time I flash over anything that is associated to AOKP or CM10 (AOKP, CM10 Nightly, tMIUI, ParaNOID etc etc) .. I have an issue where my WiFi will see everything out there in the world, but will NOT attach !!!
I have tried everything that everyone has suggested in regards to different versions of CWM (5.8.4.7, 5.8.4.7 Touch and 6.0.1.2) .. different Kernel releases from Ktoonsez and Faux123 .. Different ways for full wiping everything to dirty flashing .. and nothing.
WiFi will find everything, attempt to attach and will just end up either "Saving" to "Out of Range" (even if I'm right next to it) .. I have a LinkSys/Cisco E4200 router that is WPA2 Personal protected (I have removed that and tried) .. my work router I have no idea what it is, but it is also WPA protected .. either way .. will not connect and obtain IP.
Now, I am able to connect if I enter a static IP !!!
I know this is not a hardware issue with my phone .. if I ODIN back to stock, either the official LG1 or the leaked LH1 .. everything works perfectly .. WiFi hooks immediately, no issues.
Any ideas anyone ??

I've had flakiness.
But nothing to the extreme of what you're experiencing.
Could be you have a hardware revision that is not compatible with CM kernels for some reason.
Did you try flashing a CM ROM and then using a stock kernel with it?

I'm having exactly the same issue. So far I haven't found anything to work.

CZ Eddie said:
I've had flakiness.
But nothing to the extreme of what you're experiencing.
Could be you have a hardware revision that is not compatible with CM kernels for some reason.
Did you try flashing a CM ROM and then using a stock kernel with it?
Click to expand...
Click to collapse
Yep .. tried stock also .. nothing.
Triavius said:
I'm having exactly the same issue. So far I haven't found anything to work.
Click to expand...
Click to collapse
Yeah .. interesting issue since it seems that many people are NOT experiencing this issue.
I definately cannot see it really being a hardware revision issue .. I mean, AT&T has 3 SGSIII phones, only difference between them .. Pebble Blue, Marble White and Garnet Red !!!

LordGeek said:
Yep .. tried stock also .. nothing.
Yeah .. interesting issue since it seems that many people are NOT experiencing this issue.
I definately cannot see it really being a hardware revision issue .. I mean, AT&T has 3 SGSIII phones, only difference between them .. Pebble Blue, Marble White and Garnet Red !!!
Click to expand...
Click to collapse
Yeah if it counts I have a Blue one that I got Friday. Hopefully we can figure out what's going on.

Under advanced there is a setting for 5ghz or 2.5 or auto make sure u use 2.5 i have seen threads where auto makesbit cutbin and out..also as others have said the kernel is where the wifi is..i ise toonz new kernel 8/31 i think and all is well
Sent from my SAMSUNG-SGH-I747 using xda premium

JB calhoun said:
Under advanced there is a setting for 5ghz or 2.5 or auto make sure u use 2.5 i have seen threads where auto makesbit cutbin and out..also as others have said the kernel is where the wifi is..i ise toonz new kernel 8/31 i think and all is well
Click to expand...
Click to collapse
Done that as well.. no difference. Tried Auto.. tried 2.4GHz, tried 5GHz .. still only works if static.
Sent by LordGeek via his Samsung Galaxy S™III.

LordGeek said:
I definately cannot see it really being a hardware revision issue .. I mean, AT&T has 3 SGSIII phones, only difference between them .. Pebble Blue, Marble White and Garnet Red !!!
Click to expand...
Click to collapse
I guess you don't have any manufacturing experience.
MFG's are making changes all the time. It's supposed to be MINOR changes. Like mostly firmware.
It's not the most likely issue. But IMO, it's plausible.

Whether or not there is any sort of knowledge of hardware revisions to AT&T's SGSIII's .. they all use the same firmware/software. However, if someone wants to see what they have .. under my battery, I have the standard information .. plus:
IMEI : (blah blah blah)
S/N : (blah blah blah) ZR
1207 (barcode) REV0.4
SKU : 6013A (barcode)
Made in China

Anyone want to help out here ? Let us know what is under your battery as to REV #'s.
Sent by LordGeek via his Samsung Galaxy S™III.

If ur still on and want to know ill check
Sent from my SAMSUNG-SGH-I747 using xda premium

JB calhoun said:
If ur still on and want to know ill check
Click to expand...
Click to collapse
I'm on .. be interesting to see if there is a difference in the REV #'s .. and whether that plays a part of the issues people are having with there WiFi and raw builds.

I GIVE UP
I give up .. just tried installing the new # 2 build of tMIUI (said there were WiFi fixes) .. again, same ole SH*T .. my phone refuses to connect via WiFi unless I set it to static.
I wanted to see if there was something out there that could possibly distinguish some sort of difference (if there was any) between the REV#'s .. request if ANYONE can pull there batteries out for 2 seconds and see what there REV#'s are .. got one response and even that person didn't come back.
Guess I'll stick with stock until there is some sort of miracle break through that someone can figure this out .. since I can't.

There is an option I just noticed in my WiFi settings that let it connect to WiFi even if the signal is low. You guys having real troubles might try that setting.
I think the issue is mostly just a lower sensitivity WiFi.
Stock ROM+WiFi gives me lots of bars.
CM based ROM+WiFi doesn't get me as many bars. Sensitivity is much less, so it's more susceptible to flaky signal connections.

CZ Eddie said:
There is an option I just noticed in my WiFi settings that let it connect to WiFi even if the signal is low. You guys having real troubles might try that setting.
I think the issue is mostly just a lower sensitivity WiFi.
Stock ROM+WiFi gives me lots of bars.
CM based ROM+WiFi doesn't get me as many bars. Sensitivity is much less, so it's more susceptible to flaky signal connections.
Click to expand...
Click to collapse
I had a similar issue where my phone would refuse to connect to all my routers, (2 at Home & 2 at work.) It would connect to them on stock but not on any other Rom.
I had to change the SSID's on my routers, on the new SSID's it connected perfectly..... It was a ***** to convince my IT admin at work to change the SSID's for Me.....

CZ Eddie said:
There is an option I just noticed in my WiFi settings that let it connect to WiFi even if the signal is low. You guys having real troubles might try that setting.
I think the issue is mostly just a lower sensitivity WiFi.
Stock ROM+WiFi gives me lots of bars.
CM based ROM+WiFi doesn't get me as many bars. Sensitivity is much less, so it's more susceptible to flaky signal connections.
Click to expand...
Click to collapse
Tried that also .. removed the check-mark from "Avoid low signals" .. didn't make an difference at all
rohanmaini said:
I had a similar issue where my phone would refuse to connect to all my routers, (2 at Home & 2 at work.) It would connect to them on stock but not on any other Rom.
I had to change the SSID's on my routers, on the new SSID's it connected perfectly..... It was a ***** to convince my IT admin at work to change the SSID's for Me.....
Click to expand...
Click to collapse
So what was different in the name structures ? I have right now a LinkSys E4200 which is dual-band 2.4GHz and 5GHz .. the names on my SSID's are "lordgeek_24" and "lordgeek_5" .. again, everything in the house can connected without issues (other Android phones, PS3, laptop and tablet). Compared to yours .. what did you have to change in the name in order for it to connect ?

I just put in a hyphen in between randomly.
All other devices were connecting just fine only my phone was not.
Sent from my SAMSUNG-SGH-I747 using xda premium

rohanmaini said:
I just put in a hyphen in between randomly.
All other devices were connecting just fine only my phone was not.
Click to expand...
Click to collapse
Interesting .. well when I get home .. will give it another whirl .. will change the SSID's to see what happens. Will report back once done.
rohanmaini .. for ****s and giggles, could you please check under your battery to see what the REV # is and let me know .. as posted before, mine reads REV0.4 .. be interesting to see if yours is the same or not.

LordGeek said:
Interesting .. well when I get home .. will give it another whirl .. will change the SSID's to see what happens. Will report back once done.
rohanmaini .. for ****s and giggles, could you please check under your battery to see what the REV # is and let me know .. as posted before, mine reads REV0.4 .. be interesting to see if yours is the same or not.
Click to expand...
Click to collapse
It is 0.4
Sent from my SGH-I747 using xda premium

Thank you rohanmaini for the suggestion
rohanmaini
WELL HOLY SH*T .... I got home, before doing anything else, fired up the home computer .. changed my SSID's for both bands (2.4GHz and 5GHz) .. also reinitialized my extender for the new SSID .. would you believe, my damn phone connected to the new SSID's immediately !!!!
"lordgeek_24" changed to "LordG33K24"
"lordgeek_5" changed to "LordG33K5"
Now .. the new question is:
Why would the SSID on a router cause such a huge headache between different ROM's ????

Wi-Fi unreliable

Recently I've been having problems with Wi-Fi. My phone and nexus 7. They both stay on blue bars all the time claiming they're connected to Google servers. And it'll work good for about 20 seconds and then I'll have no connection for about a minute. Bars will stay blue like its connected and WiFi show that it's fill signal but pages won't load, apps will timeout and YouTube videos won't stream. Makes it impossible to download any Roms or apps at times. This just recently started happening. Videos will stream good for maybe 2 minutes tops. Then pause, after a minute Wi-Fi will stay streaming and going again by itself and stream. I haven't changed my router or is settings. I have static ip's assigned too. All other computers work just fine for internet. Never a problem.
I've tried changing kernels, Roms, complete wipes and reinstalls. Rebooted the router. Nothing fixes it. I'm getting really frustrated. I'm at the point where I'm going trio go buy a new router just cause I want to use 5ghz. Anyways, any suggestions to solve this?

There may be an error in aosp code that can cause wifi instability: http://forum.xda-developers.com/showpost.php?p=35146886&postcount=5128

mwalt2 said:
There may be an error in aosp code that can cause wifi instability: http://forum.xda-developers.com/showpost.php?p=35146886&postcount=5128
Click to expand...
Click to collapse
Weird how it affects just my device in an entire thread with a ton of people using the rom and same kernel.
I went and picked up a new router. I'll see if that fixes it. Thanks for the input though. I appreciate it.

Didn't help with new router. My WiFi still cutting out like crazy on Franco kernel. Almost as soon as I turn off screen. But its not turning WiFi off. Just goes into some sort of state where nothing comes through. When screen on everything is fine though now.

In Wifi settings, you could try unchecking "Avoid Poor Connections" and see if that helps.
Also do you have any other devices at home on the same wifi network - do they experience the same issues, I know where I am if we get a lot of rain, it causes intermittent internet slowdowns, I had similar issues and after testing other devices found this to be my problem not my Wifi.
Also, have you got any cordless phones in the house that might run on the same frequency?
I still have an issue keeping wifi at 100% d/l when the phone is asleep, even though the setting is for always on. It must be a hardware thing for me because every rom I've tried from ICS to the latest JB exhibit the same issue. If I am in a desperate need to d/l a large file on my phone, I just temporarily change the screen display off timer to 10 minutes of so so the wifi will stay at max d/l speed.

https://play.google.com/store/apps/details?id=com.ratcash.wifiperf
Could try this I use on my gnex for voip
Edit I am on a galaxy nexus forum
Sent from my Nexus 7 using Tapatalk 2

Ya avoid poor connections is unchecked. And wifi optimization is unchecked. I've tried putting my router on full auto, tried setting static ip addresses for everything. Changing from wireless n to wireless g. Changing security to off as well. Using the 5ghz band instead of 2.4. The nexus 7 is working perfectly fine with the new router. But my galaxy nexus is totally unreliable. Weird is that it just started happening within past couple weeks. And actually, it was good for the first day or so after new router. I can confirm all other wifi devices jn the house work just fine without any hiccups. I've never had a problem with other devices. No dropouts or anything. It's really puzzling me!
One thing I found weird, if I disable wmm on my router, my nexus 7 and galaxy nexus will not connect. Anyone else get this?

I hope you also have your router firmware completely up to date.

Please read forum rules before posting
Questions go in Q&A
Thread moved
Thank you for your cooperation
Friendly Neighborhood Moderator

CADude said:
I hope you also have your router firmware completely up to date.
Click to expand...
Click to collapse
Ya my router auto updates itself. Its a Cisco EA6500 in case your wondering and is helpful.

I use my wifi at work and it's very unreliable. At times going into an endless disconnect/reconnect loop. Sometimes restarting the wifi helps or putting it in and out of airplane mode. Other times nothing helps except a reboot of my phone. Some apps may make the issue worse. I don't think there is a fix and waiting for google to fix the flaw a user pointed out earlier.
Sent from my Nexus 7 using Tapatalk 2

chrisinsocalif said:
I use my wifi at work and it's very unreliable. At times going into an endless disconnect/reconnect loop. Sometimes restarting the wifi helps or putting it in and out of airplane mode. Other times nothing helps except a reboot of my phone. Some apps may make the issue worse. I don't think there is a fix and waiting for google to fix the flaw a user pointed out earlier.
Sent from my Nexus 7 using Tapatalk 2
Click to expand...
Click to collapse
Possibly a 4.2 issue. But its not affecting everyone it seems. But i see that there is a huge thread about this at the google site. Not an isolated case

When you say you set a static ip, you set one from the router, have you tried setting a static ip on the phones wifi advanced options as well?
Have you tried different radios?
Sent from my Galaxy Nexus using Tapatalk 2

Yup has happened to me mine connects to the net but has grey bars and doesn't open any websites and apps dont connect to the net a reboot solves the problem

chrisinsocalif said:
When you say you set a static ip, you set one from the router, have you tried setting a static ip on the phones wifi advanced options as well?
Have you tried different radios?
Sent from my Galaxy Nexus using Tapatalk 2
Click to expand...
Click to collapse
I set static on both router and the phone. I've tried all the north american radios. None of the euro ones. no effect. Sticking to the latest North American radio for now. I've managed to make it work sorta with CM10.1 with stock kernel on completely fresh install. It works, but the down arrow on the Wi-Fi icon stays lit almost 100% of the time. no idea why, only other device that was on all yesterday was the nexus 7, and that was on the 2.4ghz and phone the 5ghz. Huge wlan_rx_wake!

It's likely this:
http://code.google.com/p/android/issues/detail?id=40065&colspec=ID%20Type%20Status%20Owner%20Summary%20Stars&start=1000
See if that sounds about right and if so, you'll just have to wait for a Google Patch.

whitedragonz83 said:
It's likely this:
http://code.google.com/p/android/issues/detail?id=40065&colspec=ID%20Type%20Status%20Owner%20Summary%20Stars&start=1000
See if that sounds about right and if so, you'll just have to wait for a Google Patch.
Click to expand...
Click to collapse
Yeah. Just don't understand how so few here experience this. And only my phone, not my nexus 7 gets this.

M3drvr said:
Yeah. Just don't understand how so few here experience this. And only my phone, not my nexus 7 gets this.
Click to expand...
Click to collapse
When i first updated to 4.2, I was getting crazy dropouts. After unchecking the Wi-fi optimization, it was more consistent but still drops out frequently while at work. There is a known bug with the wifi driver that hasn't been addressed for years, but still trying to find the original articles describing the problems.
It seems you are having tons of issues, worse than most.
If you are having a problems suggested on this site, maybe this can help.
http://goo.gl/voSxF

It affects me as well. Completely random. Everything appears fine except that instead of blue, the icons are grey. Turning off wifi and turning it back on fixes it.
In the link above, there is a comment where you can submit more info for Google to help solving the problem:
http://support.google.com/nexus/bin/request.py?contact_type=bugreport&src=7679593

chrisinsocalif said:
When i first updated to 4.2, I was getting crazy dropouts. After unchecking the Wi-fi optimization, it was more consistent but still drops out frequently while at work. There is a known bug with the wifi driver that hasn't been addressed for years, but still trying to find the original articles describing the problems.
It seems you are having tons of issues, worse than most.
If you are having a problems suggested on this site, maybe this can help.
http://goo.gl/voSxF
Click to expand...
Click to collapse
the weird thing is, it just started happening about 2 weeks ago. It was perfectly fine up until then. Never had an issue with Wi-Fi. If this don't work i might try doing an entire wipe right back to stock and locking bootloader.

[Q] Why does JB 4.1.2 not connect to wifi properly??

Hello all. I have been playing with the new 4.1.2 JB ROMs on my 7100 Note2 and have been having one major and repeatable issue, that I have seen mentioned a few times by others, with no obvious resolution.
I have tried the various leaks of the 4.1.2 that were floating around (the stock one, Wannam and Android Revolution HD 5) and now I have just tried the final Polish PLAY version of 4.1.2 as well as the latest Wannam as well. All do/did the same thing:
They can see my wifi SSID and they can BEGIN to connect and "obtaining IP address" comes up. EITHER they then fail and tell me connection is poor and to try again, or they will connect and then drop within a minute. Just today I made some kind of movement on this by trying different kernels. Perseus25 gives up and tells me signal is poor. Perseus27 WILL actually connect and stay connected but can never actually surf anywhere. Note2Core will either connect or tell me my authentication is wrong (which it isn't) and when connected, it too refuses to surf. RedPill is same as Note2Core. BTW, even when they DO connect, they do so at a measly 5Mbps (and cant find internet)
Now, you are all probably thinking "his wifi is rubbish!" but I REALLY cant see how that can be! Firstly, there are other users out there who have mentioned this in a few threads but I have never seen any useful replies as to a solution (or a cause!). But also, if I restore back to my usual ROM which is Android Revolution 4.1 HD (=JB 4.1.1) with a perseus25 kernel, then I connect immediately and stable at 54Mbps and works great. (all it takes is a CWM restore back and it is working 100%. same location in my office, same router, wifi etc!) Plus same wifi serves two laptops, wife's Galaxy S2, and has seen many iphones, ipads, and other laptops all fine.
Back in the days of the leaked 4.1.2 I DID try jumping wifi channels on the router just to prove a point. Every single one did same thing.
Flashing procedures have been the 'standard' method: boot into CWM, wipe data/cache/dalvik/battery, then flash new ROM, boot OK.
I had assumed that the early leaked version of the ROM had some bug but very disappointed to find same behavior in the Polish PLAY version which is final release AFAIK. It makes all these subsequent ROMs based on it totally useless to me.
I even extracted and flashed the modem.bin from my working ARHD4.1 ROM but nothing changed. So modem and kernel same as working systems but something clearly broken somewhere.
If you are one of the other folks out there who also has this issue, might be helpful if you give some info about your setup, so somebody clever out there can help us join the 4.1.2 club?!
Any thoughts?
(setup: UK VirginMedia 120Mbps down/10Mbps up. Cisco Linksys E4200 router. about 10 feet from router with one 'paper wall' between! ARHD4.1 finds full signal and surfs fast. 4.1.2 totally unusable)
Help me Obi-Wan Kenobi(s), you are my only hope!

I have noticed similar problems on my SGH-i317 using CleanROM 3 (4.1.2). The wireless connection randomly drops while browsing. This happens even in areas with excellent signal quality.

-Sn1PeR- said:
I have noticed similar problems on my SGH-i317 using CleanROM 3 (4.1.2). The wireless connection randomly drops while browsing. This happens even in areas with excellent signal quality.
Click to expand...
Click to collapse
Thanks for contributing. Helps prove the point that it is something in the new ROM as our wifis are fully functional otherwise. I have matched the modem and kernel from my working 4.1.1 system and still failing....
I hope we get some help.

I also got this problem from latest WanamLite & Omega ROM. Both are using 4.1.2 JB.
Wifi detected and connected but always obtaining ip address..
Sometimes it tooks so long and can get ip, but still cannot access internet or can't even ping different ip address from the same network.

hendry said:
I also got this problem from latest WanamLite & Omega ROM. Both are using 4.1.2 JB.
Wifi detected and connected but always obtaining ip address..
Sometimes it tooks so long and can get ip, but still cannot access internet or can't even ping different ip address from the same network.
Click to expand...
Click to collapse
strange, i've been running omega 7 to 7.4 but dont have any problems with wifi.
i've connected to home wifi (TP-Link), workplace (Cisco/Linksys) and some coffe-shops without any problem.
most of them using WPA2 or WEP. sometimes obtaining ip address with WEP could take a lil longer about (10-15sec) but always a success.
but never used wanamlite for my note2 so cant comment any, srry

I'm not saying the issue is in the wifi itself, but it can probably be fixed by disabling n mode and only using b and g. Also try to make sure the phone gets assigned a static ip.
Issue seems to be 4.1.2 related.
Sent from my GT-N7100 using Tapatalk 2

yes.. i'm also facing the same problem.. whenever i flashed custom rom based on 4.12, like wanam 2.0, 2.1 n crash rom, i cant connect to the wifi.. it always shows optaining ip address and it never connected.. now i m using stock rom 4.11 n there is no problem to connect to the wifi..
i juz wonder why it happens to several devices only?

I having the same wifi problem with 4.1.2 firmware...revert back to 4.1.1 wifi connection run flawlessly..strange !

I have tried switching OFF the 5GHz signal from my modem and sticking to 2.4GHz.
Have also tried turned off N and locked it down to just B & G.
Have tried turning off the WMM in the QoS section.
All of these have been mentioned around the place as possible solutions, and I am afraid none of them changed anything at all for me. Also read that one person had his wifi issues resolved when he dropped WPA2 security and went back down to WEP. This is an unacceptable solution to me as I don't want to make my WiFi so insecure, and also, what happens when I go to my friends and family who all (rightly) use WPA2?! So wont even be trying that.
I am actually getting a new Virgin Media Superhub in about 2 weeks so will revisit the issue then to see if 4.1.2 just doesn't like my Cisco router.
Just weird. And frustrating as wanted to move on to 4.1.2!

have you tried changing the channel on your n router?

Ok. I here is my evo 4G lte story. I flashed cm10 as soon as I got this phone a month and bit ago. I totally had wifi connectivity problems at work and at my house. One worked better and one had to be spammed to connect 20 times to connect and would still occasionally drop. I went to sense is from there and found it to be reliable. Though I just moved to the ota, I find this sense to be just as reliable.
In all. The new ota let me move to jb with reliability.
Sent from my EVO using xda app-developers app

I dun think it is about router.. because with 4.11, I found no problem to connect.. when I use 4.12, I cant connect to any other wifi network..
Sent from my GT-N7100 using xda app-developers app

Why not all people getting this wifi problem using 4.1.2 ROM? Does the device something problem? But why going back to 4.1.1, wifi problem dissapeared and can connect directly?
Really2 weird....
Sent from my GT-N7100 using xda premium

hendry said:
Why not all people getting this wifi problem using 4.1.2 ROM? Does the device something problem? But why going back to 4.1.1, wifi problem dissapeared and can connect directly?
Really2 weird....
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yes.. i also wonder why this happen..

I also have exactly the same problem. I have tried every single 4.1.2 ROM but I can't keep my wifi working. I have had to go back to 4.1.1 as well. My wifi is perfect on 4.1.1. I use Cisco e4200 with ddwrt flashed. Very frustrating!

kobykoby said:
I also have exactly the same problem. I have tried every single 4.1.2 ROM but I can't keep my wifi working. I have had to go back to 4.1.1 as well. My wifi is perfect on 4.1.1. I use Cisco e4200 with ddwrt flashed. Very frustrating!
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have u tried 4.12 stock rom before u flash 4.12 custom rom?

All 4.1 2 rom having same wifi problem for me..i guess the problem from firmware itself ...
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Try changing channels to below 11 if you're in Europe and the router uses channels above.
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I`am on ARHD 6.0 currently and i never had problems with wifi on all the previous ARHD rom`s. Try doing a full wipe or at least also do a system wipe (and wipe cache/dalvik cache, data/factory reset and format preload) before flashing a rom. I`am sure that will help guys.

i have same problem no ip adressing and when i set statique ip no internet
i test Omega wanam mondx... same issue
omega 6.1 works great but at 7 version no internet by wifi, but ok in data
i have a logcat if help (catlog app)
i test rest router, change wpa2 to wpa, change channel, wps, super wipe (allll format) every omega rom, set mac adress in router with static ip
i become crazy why not on all device its n7100 XEF french buy on amazon
Sorry for my poor english

[Q]Wifi problems

I've done some searching and have found some of the dumbest things that make no sense. I have 2 problems. 1 - If the wifi shuts off it will not reconnect to my router. This only happens when the router is on N only (both 2.4 and 5ghz). And 2 - The download over wifi is incredibly poor. I get speedtest results turning back 3mbps down 6mbps up. Why is the download so poor? This is on wifi NOT 4glte. on 4g I see around 13/9 with 3 bars.
I've also tried all the modem firmwares and all were bad except the previous one before the current update. using CSrom

To my knowledge the modem file will have nothing to do with the wifi radio or its firmware.
The connection errors seem to be wpa. Wep or running open and I can connect every time.
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spasch said:
To my knowledge the modem file will have nothing to do with the wifi radio or its firmware.
The connection errors seem to be wpa. Wep or running open and I can connect every time.
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Ok well I got the problem solved some how by changing roms. The rom I used moved to graviton so I switched, No problems with that now. Its just the download is terribly slow for wifi. The upload goes higher than the download.
Not to mention I'm not even 15 feet from the router getting 1 bar for wifi.

My speedtest app was botched. I redownloaded it and suddenly 12/5 easily. Not sure if thats the max the GS3 wifi can do but thats where it topped on 2 different GS3. One running stock 4.1.1 and mine running graviton 4.1.2.

Herox said:
My speedtest app was botched. I redownloaded it and suddenly 12/5 easily. Not sure if thats the max the GS3 wifi can do but thats where it topped on 2 different GS3. One running stock 4.1.1 and mine running graviton 4.1.2.
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I personally get 19/8, im running quantum v1.15. what kind of speeds do you get on a computer?

chapelfreak said:
I personally get 19/8, im running quantum v1.15. what kind of speeds do you get on a computer?
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My desktop gets 56/5.8 wired. The wireless pcs in the house get 20 - 30 on wifi. My package is 50/5. I'm beginning to think my router and extender both dislike the GS3. My old ass LG optimus was able to get 20down and its ancient.

Ok so it turns out its because my router/extender are dual band? Is there anything I can do besides buy another router? The ones I have are fairly good and I don't want to replace them.