yashsingh1/xdaforums huggingface dataset:
[Galaxy S II Q&A, Help & Troubleshooting] khani245:
Prior to having this wifi issue I was on this same Philz kernel.

I was having an instinct that it wont solve the problem. Can you suggest me to flash some other kernels?

Regards.
[Galaxy S II Q&A, Help & Troubleshooting] kt-Froggy:
Just a shot in the dark, but you could try latest Apolo 4.7, since it has new WiFi drivers from S4 -- see if that helps...
[Galaxy S II Q&A, Help & Troubleshooting] Sun90:
Ok, then u can try the siyah kernel from the link below:)

http://d-h.st/1kT

or even the 'Apolo' as mentioned by kt-Froggy and see :)
[Galaxy S II Q&A, Help & Troubleshooting] khani245:
Flashed the apolo kernel but no sucess... the stupid wifi doesnt turn on :(
[Galaxy S II Q&A, Help & Troubleshooting] khani245:
Will try Siyah Kernel and let you know... This wifi issue ate all of my office time today... signing off... I'll get back to update you if it worked... Thank you very much :D
[Galaxy S II Q&A, Help & Troubleshooting] khani245:
Bro I tried the siyah kernel but the wifi still doesnt turn on... :(

Please advise.
[Galaxy S II Q&A, Help & Troubleshooting] cloneme:
I have the same problem as khani245 only I had originally NeatRom XWLSS on my phone and worked well no problems until I went o/s for a couple of weeks and I changed sims and I couldn't get wifi so I had a Samsung guy look at it and to fix he put GB 2.36 and it worked sort of but when I got home and changed back to my recent NeatRom I couldn't even get the green ticks in the wifi settings. I have gon back to GB2.3.4 cleared everything installed stock rom and now get the green wifi ticks but wifi is continually searching for any connection but can't even find my modem/router 4` away. There is a problem and it seems to be a software problem.
[Galaxy S II Q&A, Help & Troubleshooting] khani245:
your problem is different from that of mine... your wifi is unable to connect to a network whereas my wifi doesnt even switch on...

Someone plz advise...
[Galaxy S II Q&A, Help & Troubleshooting] cloneme:
You said "I've tried every thing; Flashed stock GB 2.3.6 & JB 4.1.2 I9100XWLST, Did factory reset, wiped cache data, etc etc." but just try and put in a GB 2.3.4 here http://xdaforums.com/showthread.php?t=1075278 then the stock Kernel and see. I got the green ticks up where as before i couldn't even turn wifi on it was greyed out. Also I think after GB2.3.5or 6 you can't use the jig to turn your custom rom counter back to zero.
[Galaxy S II Q&A, Help & Troubleshooting] khani245:
Can u please explain little bit, i read that forum and went totally confused. Further, i no nothing about this jig thing.

Download link to download old bootloader to safely reset the binary counter with a Jig is down. Do you have a mirror link?

Thanks for helping.

Regards.
[Galaxy S II Q&A, Help & Troubleshooting] cloneme:
Looks like all those old links are gone I installed the old GB2.3.4 and stock kernel because I had save them. You will have do a seacrh reset counter jig but it's really only necessary if you root your device and want to go to Samsung service.

---------- Post added at 07:42 PM ---------- Previous post was at 07:39 PM ----------

I just found an old boatloader if you want me to up load it for you.
[Galaxy S II Q&A, Help & Troubleshooting] khani245:
Im trying my best to resolve this issue in XDA so that i need not have to go to service center. Service center will only suggest to change the main motherboard to save their time fixing the issue and make some free money.

Please guide me with this bootloader thing if it can solve the issue.

After flashing 2.3.4 can I again get back to 4.1.2? coz 2.3.4 is very old and buggy.

Thank you.

Regards.
[Galaxy S II Q&A, Help & Troubleshooting] king_below_my_lord:
Try reading this http://xdaforums.com/showthread.php?p=42105936 post of mine, it's a very common problem for device's which are 1-2 year's old. If this is you're problem you will be lucky to get it fixed without a motherboard replacement, but I always have my doubts when something stops working after a flash, usually it will be some kind of driver issue. But since you have tried everything that the people here told you...

Edit :yes you can go back to jb after flashing gb, but I say it's quite unnecessary after all you did a series of flashing, but since it won't hurt to try.. Good luck...
[Galaxy S II Q&A, Help & Troubleshooting] khani245:
So u mean its a hardware issue and i must get my fone fixed by an electrician?

But... This same issue I experienced when i was on ICS 4.0.3 where the wifi used to get freeze. everybody then told the same BAT500 issue but then it wasn't... it got solved by some firmware flashes i guess (Cannot recall). I'm so damn confused...

the above guys tells me to clear binary counts or something which im still trying to understand... seems like this is my last samsung fone ever.. :(
[Galaxy S II Q&A, Help & Troubleshooting] king_below_my_lord:
Yes, why I am saying that you probably have a BAT500 acid leak is because you experienced issues before, since the acid is a corrosive substance it can damage resistors of the wifi chip, but in some cases the leak is small and will just reach the surrounding circuit and in that case the conductive nature of acids kick in, and will probably short circuit the wifi circuit(which as I said before is very near to the BAT500 capacitor) so since acids are fluids the the short circuit might be not permanent if it's leak somehow changed in flow(as we hold the phone horizontally most of the time) this might cause the problem to occur intermittently, so all I am saying is just to get the BAT500 be checked for leaks, before actually it damages the wifi chip(which then will require you to replace the motherboard), if the chip is safe, mostly cleaning the effected area with alcohol or replacing corroded resistors(out of the 5) usually will fix it, but the capacitor also might need to be removed since it's damaged and you can either replace it or leave it empty(which can probably cause problems like reduction in component life,etc etc but most people didn't experience any significant problems ), doing all these is quite cheap compared to motherboard replacement.

How much do you think 5 resistors and cleaning a circuit costs? It practically costs nothing. And usually all 5 resistors won't be damaged maybe 2 or 3.

And about the binary counter, it shows the number of flashes you have done with an unsigned package, and usually all custom roms and kernels come in this category, in other words if you flashed anything other than Samsung stock, binary counter gets triggered, it's used to check whether the user has flashed his device, resetting it to 0 is recommended before giving it to the service center as they will deny warranty if they see a change in the default value.

Edit ;You don't need to worry it may or may not be the problem, all I am telling you is just to verify with someone you can trust, and Samsung in my opinion one of the best, even though HTC One is beautiful it's plagued by design problems, every device have these kind of problems, there is no way Samsung can test a phone for long periods like 1-2 year's before releasing. This BAT500 problem occurs due to constant usage for prolonged time, heating is also highlighted as the major reason for this. It's natural for an electronic component to wear out, we just have to learn to accept that.
[Galaxy S II Q&A, Help & Troubleshooting] king_below_my_lord:
Anyway good luck pal on your issue I won't be able to personally reply to you for sometime (going to get a blindfolded treatment in an eye hospital for 7 days) but I really do hope that you resolve your problem.
[Galaxy S II Q&A, Help & Troubleshooting] khani245:
May u recover soon :)
[Galaxy S II Q&A, Help & Troubleshooting] khani245:
Just flashed back to stock ICS 4.0.4 XWLQ2 but wifi wouldn't turn on yet...

Please someone help :rolleyes:
[Galaxy S II Q&A, Help & Troubleshooting] khani245:
When i run *#*#526#*#* it says NotSet Driver loaded [NG]

How to fix this?
[Galaxy S II Q&A, Help & Troubleshooting] khani245:
Done trying every damn thing...

Tried Flashing different Roms XWKL1, XWLQ2, XWLSK, XWLST, XXLSJ, XXLSD...

Tried Flashing different Kernels PhilZ-cwm6-XWLSK-ODD-4.92.8-signed, Siyah-s2-v6.0b5-CWM, ApoloJB_4.7_Regular_TWRP

But the wifi just won't turn on !!!

I DO NOT UNDERSTAND WHY NO SENIOR EXPERIENCED MEMBERS ARE STEPPING IN FOR HELP !!!
[Galaxy S II Q&A, Help & Troubleshooting] MistahBungle:
Hey ! Lose the sense of entitlement. Did it not occur to you that nobody has helped you for a few days because nobody knows how to fix your problem ? Nobody here owes you squat, so quit acting like they do

And do not post about the same issue in two separate threads within a few minutes of each other; I'm asking mods to delete your post in that other thread.
[Galaxy S II Q&A, Help & Troubleshooting] khani245:
Have somebody ever told you that your way of talking is not polite and is kind of rude?

People never gain anything with sharp words mate... :o
[Galaxy S II Q&A, Help & Troubleshooting] Sun90:
Now u have tried all the possibilities from the software side and ur issue still hasn't been resolved, then to conclude IMO , its a possible hardware issue, henceforth just approach a samsung service center and see what they are giong to tell.

And do please relax no need to get frustrated for now :)

And these ^^ type of sentences some times do have its own negative effects over here, so do please avoid them in future :)
[Galaxy S II Q&A, Help & Troubleshooting] khani245:
Ya bro that seems to be the only option i have now...

BTW i was just wondering if running a nuke script before flashing a rom would make any difference or not?
[Galaxy S II Q&A, Help & Troubleshooting] khani245:
ok :o
[Galaxy S II Q&A, Help & Troubleshooting] trigga30:
I have the same problem with the wifi not turning on. It happened after i updated it through kies (pos) to jelley bean 4.1.2 Mines is a AT&T branded but unlocked S2 When it was on ginger bread before i updated it, it was working properly. I Tried Going through Odin to put back official att rom. but restarted still with no WIfi working. Is it possible to revert back with odin on my device to ginger bread?? its not rooted so could i brick it? Any thoughts thanks.
[Galaxy S II Q&A, Help & Troubleshooting] Sun90:
yes, its possible to rewert back to GB, but getting a stock GB firmware pertained to ur service provider is an issue, just try www.sammobile.com and see if u can get one :)

if its available then u can do the flashing :)

---------- Post added at 11:02 AM ---------- Previous post was at 10:57 AM ----------

May be or May be not, but there is no harm in giving it a try ma8, just do it and see, if it resolves ur issue (wifi) then its good for u (u will be spared ) :)

here is the link for the same :)

http://xdaforums.com/showthread.php?t=2100558
[Galaxy S II Q&A, Help & Troubleshooting] khani245:
thanks :)
[Galaxy S II Q&A, Help & Troubleshooting] naesioow:
I have similar problem. I don't think it is a hardware issue. Try this if you wish:

Plug in your charger and turn on wifi, it will show light green and leave it connected with charger and wait till the wifi is fully on, if it is unsuccessful try a few more times (I did get it on after few days, be patient). If you are lucky enough to get your wifi fully on as normal. Go to your saved wifi connections and forget (delete) them all. Then turn wifi off, and turn it on again. If you still manage to turn it on you will be able to use it as normal (except when battery is low), then set up your preferred connection (but just a few and not too many as I suspect it can't handle too many saved connections). After this, you wifi won't be able to turn on if battery level is low (less than 20%), so avoid using wifi if your battery level is low.

Try it and let me know.
[Galaxy S II Q&A, Help & Troubleshooting] evilpig:
temp solution

I've been having a problem lately, and I have a solution.

So I have been trying some new roms after my device imploded on itself and corrupted my current install (was on slimbean) so I was temporarily using SuperNexus 2.0 which worked fine, I just wanted more features.

So I tried using ReVolt, PA, and now currently on PAC. And wifi has been messing up on all three. I can see and try to connect to networks, but it gets stuck on authenticating or obtaining IP address.

And when I goto my backup of supernexus wifi works fine. I even installed the newest dorimanx kernel but it didn't fix it.

I'm currently using PAC rom. I like the features but don't know why wifi is acting up.

So the fix that is working for me is:

When connecting to your network, click advanced settings. Change from DHCP to static and fill out your IP, Gateway and DNS servers to your network (might be kind of confusing) but it worked for me instantly.

But if anyone knows what is causing this issue, please let me know... thanks!
[Galaxy S II Q&A, Help & Troubleshooting] virgo79:
Wifi during low battery

Any luck with your wifi issue ? I am facing same problem and after reading 'naesioow' post I recollect I am facing this problem since I tried to turn on wifi when my battery was around 15-18%. Is this a S2 bug ?

I cant enable portable hotspot, while trying to turn on its says' Hotspot will disable wifi' and on pressing ok it says 'error'.

I am using Alliance Rom V8.0(JB) and ApoloJB_4.7_ExtremeV2_TWRP Kernel

Hope some guru's can help us out.

:)
[Galaxy S II Q&A, Help & Troubleshooting] khani245:
No luck bro.. :(
[Galaxy S II Q&A, Help & Troubleshooting] s0higher:
I had the same problem and it`s not a software bug !!! Take your phone back to Samsung Service or do what i did :) READ THIS
[Galaxy S II Q&A, Help & Troubleshooting] khani245:
can u post a tutorial of how to dissemble the fone & clean BAT500?
[Galaxy S II Q&A, Help & Troubleshooting] s0higher:
Read that post. I did not take it to samsung service, i've repair it myself
[Galaxy S II Q&A, Help & Troubleshooting] s0higher:
I think you can find 10+ vids on youtube about that mate !!! Just just remove the motherboard and clean it on the back with a brush and some alcohol. Not Vodka :)
[Galaxy S II Q&A, Help & Troubleshooting] khani245:
any substitute for alcohol?

will shaving lotion serve the purpose?
[Galaxy S II Q&A, Help & Troubleshooting] arinsms:
I have problem with WIFI previously, wifi connected but no page display/no access.

3G works fine

SOLUTION:

Wifi Setting Advance, turn DHCP to Static ip, put ur router ip. SOLVED
[Galaxy S II Q&A, Help & Troubleshooting] manish_:
hey guys....i have a similar issue.

i once installed dorimanx kernel in my omega v23 JB rom and i tried to increase the volume through stweaks. The volume went high and everything and i was happy but all hell broke loose with wifi...it just wont turn on and phone heats up very much. i installed stock rom and the wifi won turn on even then. it just becomes dull green and stays like that. After few days wifi started turning on by itself and i flashed omega rom again and everything was fine. but there was an updated omega rom and i tried it with combination of dorimanx kernel and again wifi wouldnt work now...now for me its just like i have to wait untill wifi sets back to normal or hope it does...

this post may not have solution but i think that a little detailed input would allow us to understand the problem...if anybody else had such issue due to stweaks pls help me out guys...
[Galaxy S II Q&A, Help & Troubleshooting] Zack.TheDark:
Yeah--- I seriously doubt its hardware.

I'm having EXACT issues as the OP. I seriously doubt its hardware; because it happened as I upgraded to JB, and the OP had similar issue.

Full Story:

I was running bluekuban rom (ICS) for a very long time (6-8 months). But there are a few apps that I wanted to use that I couldn't run on ICS (google now, and instagram video). So I decided to upgrade to JellyBean. I'm usually very thorough about flashing roms, modems, and kernals to my phones. I have 2 evo3d, and 1 s2 and flash them regularly with new stuff.

So, I decided to try the latest from Resurrection Remix JB. Everything was fine, until the setup screen couldn't start WIFI. So I went online, tried at least three different kernels and two different roms; and mixed matched them. Nothing would start WIFI.

Two roms I tried (I would try more if my Internet connection was fast to download them):

Resurrection Remix

NeatROM_Lite_v4.9

RR_JB_V3.1.3_AOKP_4.2.1

Kernals I tried:

Dorimanx-V9.40

Siyah-s2-v6.0b5-CWM

XWLSW-5.11.2-PhilZ

Any mix match I do, I can't get wifi to work; Ive been working on it all day today. I'm going to try to go back to BluKuban tonight and see if wifi starts back up. Any advice would be great, thanks.

Edit:

I also wanted to add that none of the solutions provided here on this thread fixed the issues.

---------- Post added at 03:56 AM ---------- Previous post was at 03:40 AM ----------

Went back to blukernal ics and my wifi works fine now. So obviously there is an issue with jb with my devices wifi.
[Galaxy S II Q&A, Help & Troubleshooting] Zack.TheDark:
Eh; I figured out my problem; and truly I feel like I have egg on my face.

Apparently; there is a difference between Epic 4g touch and a regular Galaxy S2. I have been trying to flash Galaxy S2 Jellybean packages and not ones made for Epic 4g touch. I have successfully installed a JellyBean rom / kernel / modem. Hope everyone else finds solutions to their problems.
[Galaxy S II Q&A, Help & Troubleshooting] Daemon_necis:
Same issue here with a german I9100 with Android 4.1.2.

I have done some LogCat'ing:

I/WifiManager( 4797): setWifiEnabled : true
E/WifiHW ( 2137): ##################### set firmware type 0 #####################
D/WifiStateMachine( 2137): setWifiEnabled : WifiNative.setFwType(0)
D/WifiService( 2137): setWifiEnabled: true pid=4797, uid=1000
D/STATUSBAR-NetworkController( 2411): onReceive() - RSSI_CHANGED_ACTION, WIFI_STATE, NETWORK_STATE
I/power ( 2137): *** release_dvfs_lock : lockType : 1
I/PowerManagerService( 2137): Light Animator Finished currentValue=40
D/PowerManagerService( 2137): releaseDVFSLockLocked : all DVFS_MIN_LIMIT are released
D/STATUSBAR-WifiQuickSettingButton( 2411): Wifi onReceive(2)
D/STATUSBAR-QuickSettingButton( 2411): Button DIM
E/WifiHW ( 2137): Cannot open "/data/.cid.info": No such file or directory
E/WifiHW ( 2137): ==========[WIFI] Station firmware load ===========
E/WifiHW ( 2137): return of insmod : ret = -1, No such device
E/WifiStateMachine( 2137): Failed to load driver!
D/STATUSBAR-NetworkController( 2411): onReceive() - RSSI_CHANGED_ACTION, WIFI_STATE, NETWORK_STATE
D/STATUSBAR-WifiQuickSettingButton( 2411): Wifi onReceive(4)
E/WifiStateMachine( 2137): DriverFailedState
D/STATUSBAR-QuickSettingButton( 2411): Button OFF
W/PowerManagerService( 2137): Timer 0x3->0x3|0x1
E/Watchdog( 2137): !@Sync 230

Especially

E/WifiHW ( 2137): return of insmod : ret = -1, No such device

seems to show a complete failure of the wifi chip.

Can anybody confirm this issue?

I hope I can have a look at the wifi chip soon, cheking the mentioned Bat500 issue. Maybe Samsung build in a breaking point for devices OOW ;)
[Galaxy S II Q&A, Help & Troubleshooting] Mentalist_:
Had to register to thank you,worked perfectly, problem solved! :)
[Galaxy S II Q&A, Help & Troubleshooting] amitsch:
SOLVED!!!

I had the same problem. Wifi would turn on anymore and getting stucked greyed out.

Also i experienced bigger battery drain during the last days before i realised it. Maybe because the device got stucket in a loop-attenpt to activate/access the Wifi module.

After reading about the BAT500 problem here and in other forums i remembered that my clock and calendar would never work after replacing the battery. This problem occured already ages ago and i solved it that time by installing a little app that is connecting to the internet in start-up and checking the actual time and adjusting it.

That solved the clock problem but what i didnt know that time, is that the BAT500 is not only broken but will also start leaking acid on the Wifi module. Now, 1 1/2 years later, the Wifi module stopped working.

I opened the devise, disassembled it like in this video: (Cant post links but just google for "Samsung Galaxy S2 Disassembly") and immediately saw the acid-affected area. I cleaned it with a little brush ( tip of old toothbrush)and put the device back together.

WIFI was still not working- damn it!

I decided to give it another try, re-opened it, started cleaning again and *plop* - the BAT500 button cell came off the platine!!! :(

Hoping that it wouldt make a difference since it was already broken and leaking anyway i acried on cleaning, put everything back together aaand:

IT WORKS AGAIN!!!!

Of course the clock still does not remember what time it is after you take the Battery out but of course, there is no BAT500 anymore ;)

But Wifi seems to work again. Sice the BAT500 is not not inside anymore and cannot leak any more acid, i hope its not only a temporary solution...

Tanks for all your Infos!!!!
[Galaxy S II Q&A, Help & Troubleshooting] virgo79:
Did u change any resistor near BAT500?
[Galaxy S II Q&A, Help & Troubleshooting] amitsch:
No.

In my case it was fortunately not necessary and would have been way beyond my soldering skills ;)

I think if you start the cleaning procedure soon after the first malfunctions occur, you dont need to replace the resistors.

BTW:

Its still working fine :D
[Galaxy S II Q&A, Help & Troubleshooting] hussy22:
Hi khani:)

Its seems ur problem is similar to all S2 devices even mine too I als having the same problem wen im in ics wen ever I turn on the wifi my phone get hangs an aft tht auto restart :mad: then im in jelly bean now but the problem still remains. Here I saw many posts regarding ur problem it seems u have not found the fix yet..

Here is the simple solution fix for our S2 wifi drivers you don't have to flash different kernels or Roms its just an simple App called "WIFI PASS RECOVERY" just download the App an open it > go to settings> backup&restore there u can see Reset wifi settings (if wifi gives error) tap on it an wait for while it will fix the problem an u can able to turn on ur WiFi :thumbup: jus try it an let me knw it works for u r not ?

If i have helped pls don jus say thanks in words click the thanks button :p;)

Here is the linkhttps://play.google.com/store/apps/details?id=com.ryanamaral.wifi.passwords&hl=en

sent from I9100 XWLSS
[Galaxy S II Q&A, Help & Troubleshooting] ddulic:
Didn't work for me sadly :/
[Galaxy S II Q&A, Help & Troubleshooting] kasparb:
cleaning fixed my wifi problem.

===================

Hello, I'm new here. fixed a lot of s2's allready, and getting more and more interrested.

I read your posts about the wifi issue, and cleaning did the job for me.

the bat500 was indeed leaking (see pics) and shorted two or three pins of the wifi IC.

i carefully cleaned the corroded pins with a very thin needle, and after that with a toothbrush with alcohol. let it dry, put my phone back together, restarted and... voila! wifi back again and working!......... for 2 minutes that was :) .

opened the phone again, and spotted the area of the wifi IC more carefully and found out that there was some corrosion left on the IC. this time I took more time cleaning everything and till now it's up and running. if the problem comes back i'll post it here.

But maybe somebody can help me with this: now i cleaned the pins from the IC it's obvious that they aren't protected against corrosion and other influences anymore, because the acid from the battery destroyed the protecting film of the IC contacts, and cleaning with the thin needle must have left tiny scratches. (sorry for my sometimes bad english).

how can i protect that? can i use some automotive clear varnish? any suggestions someone ? i mean, how to protect the mainboard circuit properly.

thanks in advance, and i want to thank all the people posting on this board, they helped me with a lot of issues! :good: