yashsingh1/xdaforums huggingface dataset:
[Galaxy S II Q&A, Help & Troubleshooting] krizuoner:
Hi there, I partially solved the same problem with one netgear router by putting in a fixed ip address within my phone. Problem solved. (well, here)

krizu
[Galaxy S II Q&A, Help & Troubleshooting] inkyadrian:
What a strange senario, I am wondering what could cause this problem; time-out at the router or the phone? I have in the past left my wifi on, like last night and no problems occured.
[Galaxy S II Q&A, Help & Troubleshooting] LightningShark:
Blade Wifi Fix did nothing for me either.

I had two suspicions:

1. problem with internal routing of internet within the phone. The connection seems to be there, Ip address and status connected but the apps can't 'use' it?

2. timeout (like you say) or authentication issue where the router or phone is waiting for some 'key' to be passed before data is exchanged. Or thinks this key has already been passed...

Clearly I'm not a comms person but thats my 2 cents...
[Galaxy S II Q&A, Help & Troubleshooting] roymustafa:
This morning i went to Service center...They told me it is neither the phone problem, nor the firmware...it is Security Privacy...
[Galaxy S II Q&A, Help & Troubleshooting] temp9300:
i had tried that with mine but it didn't help in any way. :(
[Galaxy S II Q&A, Help & Troubleshooting] LightningShark:
Err not sure I follow. Can you elaborate on what Security Privacy they were talking about?
[Galaxy S II Q&A, Help & Troubleshooting] the_rascal:
I'm a little late to the party but I have the same issue. I use a DLink router.

I'm reluctant to mess with the security settings on my router, as there is no connectivity problem with my laptop nor did I have the problem with my previous phone, an HTC HD2.
[Galaxy S II Q&A, Help & Troubleshooting] Planet X:
Happened for me too. The solution is then to "forget"the network and add it again. This will work for a week. It's smoething like a policy.
[Galaxy S II Q&A, Help & Troubleshooting] roymustafa:
But today i had written a letter to Russian support center...They answered me that i have to install the latest Russian firmware GT-I9100 for RUSSIA I9100XWKF3/I9100OXEKF2/I9100XXKE7/I9100XWKF3 Gingerbread(Android 2.3) from 2011/07/13.

The text is this and try the help of google translate: Описанная Вами ситуация вызвана некорректной работой программного обеспечения телефона. Последняя версия микропрограммы GT-I9100 для России - RUSSIA I9100XWKF3/I9100OXEKF2/I9100XXKE7/I9100XWKF3 Gingerbread(Android 2.3) от 2011/07/13, попробуйте установить ее.
[Galaxy S II Q&A, Help & Troubleshooting] Nitrius:
Hmm my Galaxy S2 doesn't seem to have this options, maybe it was removed in the latest KI4 release?

Been to wifi settings clicked menu and advanced, but no regulatory domain option there, only wifi sleep policy and some port, ip and other network related options.
[Galaxy S II Q&A, Help & Troubleshooting] roymustafa:
May be this link will help someone ... http://android.stackexchange.com/qu...ems-with-wifi-signal-bad-reception-breaking-c
[Galaxy S II Q&A, Help & Troubleshooting] LightningShark:
@roymafsta

Im guessing here... but judging from the date of the firmware release they could be talking about 2.3.4. I upgraded to this (whatever version came to Sweden XWKI4) but it didn't fix it for me but by all means check it out and report back!
[Galaxy S II Q&A, Help & Troubleshooting] LightningShark:
I also have no idea what this is. Sounds to me like router settings...
[Galaxy S II Q&A, Help & Troubleshooting] roymustafa:
Yes you are right. I also flashed the latest firmware for Nordic countries KI4...nO RESULT...I found the app called Fix My WiFi...They say helps to solve this problem. Just installed... From this link....http://4pda.ru/forum/dl/post/1140768/FixMyWiFi_v2.9.apk
[Galaxy S II Q&A, Help & Troubleshooting] finito02:
In this days I've also discovered another interesting thing. Maybe I've just written it but i'll repeat it....When internet connection goes down if you wait for some minute (5-10) then it will work again.

Everyone should try if this is true also for you or it's just in my case.

For checking internet connection, I visit router address 192.168.0.1 .... When internet connection works any browser open this address in 1 second; when internet connection doesn't work any brower won't open it.

@inkyadrian

I've quoted your messagge because I want to say that if you want to be sure that you don't have this problem, then it's not enough that you leave wi-fi on. In fact you also have to check internet connection at regular interval ( 15-20 minutes).

And what's their solution to the problem?

No results for me with this solution.

I think that this is a classical answer of support center. For them upgrading the firmware is a solution for all.

I wish it could be so easy.

You're talking of something different from us.... I Only need to switch wi-fi off and on to make it works again.
[Galaxy S II Q&A, Help & Troubleshooting] Movisman:
Hi all,

First post on XDA - just picked up a Samsung Galaxy S2 last week on Vodafone UK! Just spotted this thread and I have exactly the same issue as the OP.

I have tried the carrier firmware on the device by default (BUKG2), and have also flashed the stock XWKF3 firmware, and the issue persists on both variants. I haven't tried any other firmware yet.

I am using WPA2 encryption on the router, all other devices and previous mobiles connect with no issue.

Happy to help with any testing.

Cheers
[Galaxy S II Q&A, Help & Troubleshooting] roymustafa:
They sais it is not a problem...But from Russian Service Center told me that i have to bring it for diagnostics...
[Galaxy S II Q&A, Help & Troubleshooting] finito02:
Try what I've said some post before... If you'll wait some minute (5-10) internet connection should work again
[Galaxy S II Q&A, Help & Troubleshooting] finito02:
any news? Is that program working?
[Galaxy S II Q&A, Help & Troubleshooting] Phase_:
I have exactly the same problem... I find it to be VERY annoying :( It's the only one issue I have with SGS II, otherwise it's a perfect phone.

I'm sure it's not a sleep problem in my case. I listen to internet radio (for example DI radio) sometimes and I can't listen it constantly for more than one hour because connection drops at some random point (no matter if the screen is off or am I surfing the net). I also use Skype and I can't make a call (both video and voice-only) in a single part, connection drops during a call which is driving me insane. Wifi is connected all the time, signal strength is good, but there is no access to the internet unless I turn off and on wifi. Sometimes it will start working after few minutes without restarting wifi on the device. I don't have any problems with internet radio or Skype when using 3G/HSPA.

I'm using Linksys/Cisco WAG120N router. I've tried to change almost any available setting (n only, g only, fixed IP address, changing signal intervals, setting different wifi channels). I'm using WPA2 security which doesn't make any problems for other wifi devices, but I will try to change it to WEP to check if the problem still exists on SGS II. I won't be happy if it's the only permanent solution because WEP networks are easy to hack.

I wonder if it's a hardware or software related problem (hopefully the second option...) or a problem with some specific batch (because as far as I know wifi works perfect for some users and for other doesn't).
[Galaxy S II Q&A, Help & Troubleshooting] finito02:
@ phase: You have described exactly my same situation.

But I didn't know the internet connection stops also when you're using it because I haven't test also this. This also mean that we would have problem in dowloading large file that requires more time and that don't have support for resume. And, we would have problem using IM program that requires to be online.

I would tell you that for me, changing to wep hasn't solved the problem
[Galaxy S II Q&A, Help & Troubleshooting] roymustafa:
You know, this program really made my WiFi signal stronger, but the main problem was not solved... Today I gave my phone to Sevice Center, they'll analise and flash the exact firmware. They told i have to test my WiFi with another Wifi modem...

Now i gonna take my phone...
[Galaxy S II Q&A, Help & Troubleshooting] Phase_:
@ finito02: The problem is most annoying when you have to stream some data continuously (Skype call, downloading a large file, etc.) Try to listen to any internet radio for about 2 hours - it's almost sure that you will hear silence at some point.

I wonder if Samsung will do something about it, because it's a disqualifying drawback of this wonderful phone... And it seems that replacing it is not a solution for the problem. It makes me even more curious why for one user it's working like a charm and for other it's not, even after replacing the phone for a few times. Maybe it's due to specific router-phone compatibility issue? I have the problems on two different routers (Linksys and D-Link), today I will try with the third one but I don't expect it to start working as it should :(

I'm afraid there's nothing we can do about it at the moment (maybe instead of rooting the phone, but I don't want to do this now, maybe in the future when the warranty period ends).
[Galaxy S II Q&A, Help & Troubleshooting] finito02:
I would understand why androidVNC works but I can't connect to 192.168.0.1 (Router Address).

For me this is the strangest thing
[Galaxy S II Q&A, Help & Troubleshooting] aslsthlm:
Buy a new router.
[Galaxy S II Q&A, Help & Troubleshooting] roymustafa:
An hour ago i went for my SGS2 to the Service Center. They said we are still downloading the original official firmware from Samung. He said the size of firmware i more than 1 GB :confused:. I said it has to be 514 mb. But said no, you are wrong...

If they are right and it will help for solving WiFi problem, i will never flash myself another firmware... Only from Kies...
[Galaxy S II Q&A, Help & Troubleshooting] finito02:
It's not a ruoter problem. Everyone in this thread have to buy a new router? I don't think....

Let us know...

Anyway I don't think this will solve the problem. I have KG1 flashed with Kies
[Galaxy S II Q&A, Help & Troubleshooting] inkyadrian:
I was just thinking about wifi and connection drop. I was having this problem on my pc and was thinking it was my isp. When I rang them they directed me to the settings of my router. My pc is ethernet connected to the router, so it was not the wifi causing the problem. I will get back to you when I get to look at the settings when I get home. I do know the channel and security settings were changed but cannot remember the actual info.
[Galaxy S II Q&A, Help & Troubleshooting] ss786:
I have been having the same problem and i tried different routers..different firmwares, modems and also different security settings on router. None of this has helped. I personally think that the problem has something to do with drivers installed on the mobile as this was the case when nexus one was first released too
[Galaxy S II Q&A, Help & Troubleshooting] roymustafa:
Hey man...yes you are right. Today in Service Center i was told that it happens with noutbooks and netbooks...

God bless you...If you will help i'll pray for you...
[Galaxy S II Q&A, Help & Troubleshooting] dubart:
I bought SGS2 two months ago. The WiFi problem appears every single day with my D-Link home router, but not even once at my office. Prior to SGS2, my SGS1, HTC's Desire and Legend behave the same. On the other hand, iPhones I used worked flawlessly (?!). Could it be general Android's fault, not Samsung's?
[Galaxy S II Q&A, Help & Troubleshooting] roymustafa:
Yes I think so...If it is firmware problem, it means it is Android fault, not Samsung
[Galaxy S II Q&A, Help & Troubleshooting] razorpixel:
my Belkin modem router give me same problem...after replace with new TP Link modem router, the problem solved.
[Galaxy S II Q&A, Help & Troubleshooting] finito02:
I don't even know if changing the router would solve the problem...

But do you really believe that I have to change the router when three PC work perfectly with wifi? Why I have to change my router only because GsII has a problem?I think it's not normal...

It's not a router problem, it's a GSII problem.... and at Samsung Service could say what they want.

In this thread everyone has a different router but we have the same problem.

Maybe Samsung should release a list for compatible router with gsII........ :eek:
[Galaxy S II Q&A, Help & Troubleshooting] roymustafa:
hahahaha...With my Dlink modem i had not that problem, but now with TPlink modem i have...:D
[Galaxy S II Q&A, Help & Troubleshooting] inkyadrian:
Ok, I am back and with a twist to the answer. In the router I set the security to:

wpa2-psk [aes]

802.11 mode set up to 145 mbps

Channel set to 9

What is interesting is that I installed a ROM with a kernel that is known to cause problems and my wifi was in range then out of range and vice versa, all the time kept changing the state of connectivety. It is ok now because I have changed the kernel. So beware, the kernel can cause wifi problems.
[Galaxy S II Q&A, Help & Troubleshooting] finito02:
So, according to you it's a kernel problem? What kernel do you have now? I have official kg1...

On the router I also have wpa2-psk [aes] encryption but i haven't understand what you mean for " 802.11 mode set up to 145 mbps ". I have 802.11 b+g but i haven't any parameter of mbps that I can set.
[Galaxy S II Q&A, Help & Troubleshooting] LightningShark:
If I understand..some people seem to be experiencing wifi connection drop outs and signal issues. There are many threads about having simply this.

I believe the issue here relates to wake up from connection idle or phone standby. In this case the connection does not simply drop out. The wifi connection is still 'there' just not usable.

Replacing the router may be a workaround...in the case where replacing the router is not possible it is not a fix.

I can't see that fixing an ip address or changing a router channel would work. The ip address should already be stored in the router and would not be renegotiated unless it gets reassigned. Most likely not a problem on private low turnover home networks. Router channel may fix signal issues especially where you are competing with other wifi networks.

Authentication still seems to be a potential un-diagnosed issue. Not seen so many comments about if relaxing wifi security has helped anyone..
[Galaxy S II Q&A, Help & Troubleshooting] inkyadrian:
It could be but if you are on official kernel then I dont think it is that. As for the router settings it is official that my settings were to blame for wifi dropping off.
[Galaxy S II Q&A, Help & Troubleshooting] ayamary:
Same thing happened to me too, I moved onto a new router and its only happened once so far, do me! (cognition rom)

Sent from my Samsung Galaxy S II
[Galaxy S II Q&A, Help & Troubleshooting] inkyadrian:
Bloody hell, MY phone and laptop keep getting disconnected now. A replacement router is being sent to me because there are no settings that control this behaviour
[Galaxy S II Q&A, Help & Troubleshooting] rocketjack13:
I had the same problem.

I think i solved the problem by changing the IP to static.

Do try this and let me know what happens for you guys.
[Galaxy S II Q&A, Help & Troubleshooting] LightningShark:
So.. 2.3.5.. Maybe this gets tested for Wifi issues sooner than first thought...
[Galaxy S II Q&A, Help & Troubleshooting] Doopliss:
I had the wifi-but-no-internet thing a few months ago, soon after I got the phone. It was fixed by a simple reboot of the router (which is a Netgear DG834PN). The problem hasn't happened since then, although it's possible that the permanent fix was in a firmware update (I'm currently on Cognition 1.5.1).
[Galaxy S II Q&A, Help & Troubleshooting] roymustafa:
I tried 2.3.5...Nothing helped..Still this problem...
[Galaxy S II Q&A, Help & Troubleshooting] LightningShark:
Big sigh again...
[Galaxy S II Q&A, Help & Troubleshooting] inkyadrian:
I have plugged my Belkin router via ethernet into my Netgear and now my wifi is ok when using Belkin. The Netgear router has problems with wifi, the power is up and down and my computer and phone keep losing their connections.
[Galaxy S II Q&A, Help & Troubleshooting] LightningShark:
Problem persists on 2.3.5. +1
[Galaxy S II Q&A, Help & Troubleshooting] Movisman:
Hi,

Yep I had already tried everything you suggested previous to my posts, and I was getting exactly the same behaviour.

I would say since changing to a static IP has improved things for me though?

I need to test some more really, as I don't feel it's solved the problem entirely though...will keep you posted.

Cheers
[Galaxy S II Q&A, Help & Troubleshooting] finito02:
Just tested wifi without encryption.... problem still occurs.
[Galaxy S II Q&A, Help & Troubleshooting] jcolak:
hey I solve my wifi problem.

On router I had wifi pas WEP 3022b3022b and I changed to 1234567890 and no wi fi problem.

Sh*t my bad again not working I will someone ¨!"#$%&
[Galaxy S II Q&A, Help & Troubleshooting] roymustafa:
wHERE it is? I cant find? Which router do you have?
[Galaxy S II Q&A, Help & Troubleshooting] Phase_:
I've tried the third router (Asmax) and I was thinking that everything is OK - internet connection was available constantly for few hours - but in the late evening I wanted to open my mailbox and I figured out that exactly the same problem appeared once again - wifi was connected but there was no internet access at all. Turning off and on wifi "solved" the problem immediately.

So I have tried three different routers so far (from Linksys, D-Link, Asmax) and the problem persist on all of them (I get most frequest disconnections on Linksys and the least frequent on Asmax). We really need a fix, maybe some kind of driver update...
[Galaxy S II Q&A, Help & Troubleshooting] inkyadrian:
I take it that everyone has the wifi settings of the phone to NON-sleep when screen is off?

I have just replaced my Netgear for a new one, everything is fine sofar. I did notice that my power adapter for the old router was 10 volts, whereas the new one was 12 volts.

:D
[Galaxy S II Q&A, Help & Troubleshooting] jcolak:
I change router, so far so good. New router TP Link TL-WR340G. Old one Billion ....
[Galaxy S II Q&A, Help & Troubleshooting] LightningShark:
Wifi sleep set to 'Never'. Believe this is the stock setting.

3 diff routers with problems for one dude :-(

Clearly this only affects some people.

Have borrowed a router and want to test here. Keep u posted.
[Galaxy S II Q&A, Help & Troubleshooting] inkyadrian:
Ok, I guess it is not the router in your cases. So that leaves the roms or defective sgs2's. I am on Revolution rom at the mo. What roms are you lot using?
[Galaxy S II Q&A, Help & Troubleshooting] k1000716:
I've tried various versions of Lite'ning, Cognition, Villain, SkyRom, DarkyRom2 and CheckRom. The problem has always been there, including the three stock firmwares before I flashed custom roms. I've tried different router settings, but not a different router (for any decent length of time anyway). Mine lasts a little while before dropping out but I have no idea how long - don't have the time to sit down and figure that one out!

My way of dealing with it has been to make the wifi sleep when the screen is off. That way each time I go to use it the connection is fresh.
[Galaxy S II Q&A, Help & Troubleshooting] inkyadrian:
I did lose my signal and it came back 15 minutes ago. My router is 1 floor above me. It is on 1 bar at the moment. As I am writing this it went to 2 bars but went to 1 again.
[Galaxy S II Q&A, Help & Troubleshooting] LightningShark:
Cheers for the idea :-) I do like the sound of this as a workaround.

If I understand the setting correctly then background downloads with screen off switch over to packet data. A small compromise in my opinion. Will def test...
[Galaxy S II Q&A, Help & Troubleshooting] LightningShark:
I'm not sure I get your point. It sounds like you are having router/signal problems...
[Galaxy S II Q&A, Help & Troubleshooting] sewe:
I don't have the exact same problem but after a while the speed decrease till I turn off and on the wifi
[Galaxy S II Q&A, Help & Troubleshooting] inkyadrian:
Been on to isp again today. New router yesterday. I am next to the router with my phone and yet not a full sign. I have changed the channels, unticked: firewall,ipsecpassthrough,pptppsssthrough,multicast,portscan detection and ipflood detection; thats what they said do.
[Galaxy S II Q&A, Help & Troubleshooting] finito02:
It's a good idea if you don't have push email.

Let us know if, unticking all , the problem disappear... Just this morning I have tried to untick the firewall but nothing has changed (except 30 min of illusion)
[Galaxy S II Q&A, Help & Troubleshooting] inkyadrian:
It did not change a thing! I have also changed rom radio and it may be slightly better. Also, it is a known fact, that the antenna strength signal is wrongly reported on the sgs2.

I had my cpu undervolted too, I changed back to stock but it did not change the wifi. Might try a stock rom!
[Galaxy S II Q&A, Help & Troubleshooting] LightningShark:
Not wanting to sound overly rude here but you are not running stock rom and uv cpu with a router that doesn't seem reliable.

You really need to work on getting a stable testing environment without meddled firmware.

Edit: check your setup with something that you know works first...
[Galaxy S II Q&A, Help & Troubleshooting] inkyadrian:
I was running stock rom with a new router. I can comfirm that the os is not to blame for the weak wifi, unless there is a bug which is consistent in the roms that I have used.
[Galaxy S II Q&A, Help & Troubleshooting] inkyadrian:
I am downstairs, away from the router and I have 1 bar showing out of 3. I have a ping of 50 millisecs and download of 5 megs. 5 minutes later 2 bars on wifi, ping is 27 and 10 meg download. I give up!
[Galaxy S II Q&A, Help & Troubleshooting] k1000716:
Now you're getting somewhere. :D

You've finally realised that nothing you do will have any positive effect at all. Congratulations, yuo're now where I was two months ago. I gave up too. ;)
[Galaxy S II Q&A, Help & Troubleshooting] inkyadrian:
I am on a train at the mo. My wifi connection is much better than my router, even when I am sat on top of it. The router will be sent back as I am not putting up with something less than full strength. Wifi on train = -40 db, at home, next to the router = -60 db :(
[Galaxy S II Q&A, Help & Troubleshooting] yrekik:
I was in the situation as many of you but the problem was solved by using CM7
[Galaxy S II Q&A, Help & Troubleshooting] finito02:
I've just discovered another really strange thing...There's another way to make wifi connection works again when the bug happens.

I usually have "data connection" disable because I don't have data-flat on my phone. Moreover I have a fake apn for data connection and use the correct apn only when i need it. This means that if I press the power button for 2 seconds and active "data connection" gsII still can't connect to internet because the apn is fake.

Now the strange thing is this... when the bug happens, if I switch on and off the "data connection" (so I don't touch in any way the wifi settings) internet will work again!

I'm without words.
[Galaxy S II Q&A, Help & Troubleshooting] Planet X:
At home I use a Cisco WRT-320N and never lost signal in two months. At my work I don't know which router they have but I keep loosing connection after wake the phone. It's WEP security btw. At home I use WPA mixed.

The strange thing is I had a Nexus S before and I had the trouble at home and at my work. So at least the home situation is better now. But I want to have it stable everywhere grgrgr.
[Galaxy S II Q&A, Help & Troubleshooting] inkyadrian:
Tried cm7 but I want an fm radio that works!
[Galaxy S II Q&A, Help & Troubleshooting] kalki:
Hi guys. I have sgs 2.3.5 android. the same problem with my tp link.

I think this is some android problem.