[Q] No Wifi after Wifi Analyzer... - Galaxy S II Q&A, Help & Troubleshooting

Hey guys,
I have a problem with my wifi...
Here is the before: Wifi works about 70% of the time, occasionally the connection would be dropped (as in "no network access", it still said it was connected).
Here is what then happened (in that order): Wanted to find a less crowded channel and installed Wifi Analyzer. Quickly decided that Channel 1 would be cool, browsed to the router configuration on the Desktop machine (LAN connection), changed the channel. Back to home on Android (don't remember whether via the home or back button). Into settings to see whether I would have to rescan or whether it would pick up the change of channel itself. It couldn't connect... It scans and attempts to connect, but doesn't
What I tried:
I restarted the Galaxy. Still couldn't connect.
Deleted the connection and re-entered the passphrase. Still couldn't connect.
Uninstalled Wifi Analyzer. Still couldn't connect.
Restarted device again. Still couldn't connect.
(At some point during all this, probably quite early, the Wifi symbol also stopped showing up in the status bar. Doesn't appear no matter whether Wifi is on or off)
Switched back to the channel I came from. To no avail
Switched of encryption on the Wifi. Still to no avail
Any ideas as to what might have happened and, more importantly, how to fix it? As I said the connection itself has never been the most reliable, but this is a different league
Thank you everyone!
Sandro

If you haven't tried it yet, reset your router. That fixes the majority of Wi-Fi issues out there. If that doesn't work, it may be your router itself. Certain routers have more issues with mobile phones than others.
You may want to go to a friends house and try connecting to his router and see if you can troubleshoot and isolate the issue. Either way, best of luck...
Sent from my GT-I9000 using xda premium

Damn you sitecom router!!!
Alright, one thing I hadn't tried until now was to restart the router. That fixed everything including (for whatever reason) the lack of the Wifi symbol!!
So if that is possible feel free to delete this thread! I didn't find the option anywhere...
Sorry for the unjustified disturbance
Sandro

Related

[Q] WIFI connection stops transfering data

Hi, is anyone has the same problem? When I'm connected at home to my Tenda router (WIFI b/g/n) after cca 30 min. my phone WIFI stops sending and recieving data, Skype is offline, etc... but WIFI in phone is stil switched on. After I switch WIFI off and back on (on my Samsung, not on my router), everything works good for a while and after cca 30 min. is situation the same. Is there in Samsung any WIFI sleep mode or something like that? Or some settings, which is not visible? Any other suggestions? Sorry for my poor English. Thanx in advance.
I'm having the same problem. But I did a factory reset and it works fine afterward.
And just few hours ago, I encountered this problem again. What did to get this error was, I pressed "on samsungapps" and it failed to update and thus results wifi connection stopping. What about you? Also my Kies air is not working.
are you guys sure you have wifi sleep policy set correctly? just to be sure, settings, wireless, wifi, menu button, advanced, wifi sleep policy to NEVER.
Yes. And also even if i manually disconnect and reconnect the wifi back. The data still doesn't come in. It is stated there as connected but no data at all.
Somehow Wifi keeps searching every few seconds, even thought it's connected.
This is bound to cost in battery life too.
I have reseted router to default settings, disabled n mode, disabled security (only mac filtering is on), disabled all unnecessary features and PROBLEM IS SOLVED !!! Thanx God Tomorrow I will experiment with router settings to know, what was causing this error ;-)
Well at least u're connected, I'm facing the same problem as the thread starter. No data flow at all. Browser showing me offline msg. I had the same problem on the 1st day with the phone after I woke up. previously playing with most of the default aps. So i'm not sure what went wrong, did a factory reset and it works fine.
Until, few hours ago, I tried my kies air which didn't work. Browser couldnt load the address given. And I thought i had an outdated kies air, so i went to click on samsungapps, which failed to update me. At that point the wifi is still working, i leave my phone for about 30 mins, and when i came back. The same problem which happened on the 1st day came back. I was hoping to find an answer here so I didnt do the factory reset it. On another note, the phone wifi works after restart, but wouldn't last.
Edit: The wifi works after i resetted my modem to default. oh well. at least that solved it.
lukecz said:
I have reseted router to default settings, disabled n mode, disabled security (only mac filtering is on), disabled all unnecessary features and PROBLEM IS SOLVED !!! Thanx God Tomorrow I will experiment with router settings to know, what was causing this error ;-)
Click to expand...
Click to collapse
Hi,
Did you find out what setting was causing the connection issue? I also have this problem with my Tenda router. I thought it might be the wireless N, but disabling that doesn't fix it. I have a wireless distribution system set up with other tenda routers so didn't want to disable all the settings to troubleshoot if i can help it!
Thanks
spen2 said:
Hi,
Did you find out what setting was causing the connection issue? I also have this problem with my Tenda router. I thought it might be the wireless N, but disabling that doesn't fix it. I have a wireless distribution system set up with other tenda routers so didn't want to disable all the settings to troubleshoot if i can help it!
Thanks
Click to expand...
Click to collapse
I have the same problem, my router is N and the conection between SGS2 and my router is bad. Any idea?
Same problem here, I'm running WZR-AGL300NH in access point connected to my Ubuntu Server. Everything else works in the house just fine but SG2 stops transmitting data after a while.
I recently upgraded to KF1 firmware (and unknowingly wiped out whole phone, being on the bleeding edge and that didn't seem to help.
I would very much appreciate all tips because this problem is very annoying!
Additional Info:
- Buffalo is running latest firmware
- Authentication WPA2-PSK
- Encryption AES
paranoidi said:
Same problem here, I'm running WZR-AGL300NH in access point connected to my Ubuntu Server. Everything else works in the house just fine but SG2 stops transmitting data after a while.
I recently upgraded to KF1 firmware (and unknowingly wiped out whole phone, being on the bleeding edge and that didn't seem to help.
I would very much appreciate all tips because this problem is very annoying!
Additional Info:
- Buffalo is running latest firmware
- Authentication WPA2-PSK
- Encryption AES
Click to expand...
Click to collapse
Same symptoms here. Cisco DDR2200. WPA2 PSK. Haven't tried fiddling with the router yet.
This seems to be a common problem. Anyone knows of a definitive fix?
Bump...I have the same problem and the issue persists even after i reset the phone
Sent from my GT-I9100 using XDA App
Glad I found this, thought it was the ROM I had flashed to the phone (which is VillainROM)
I keep losing connection from my phone via wifi like everyone else in this thread
edit: I've just assigned my phone an IP address via my routers settings and I can connect to the net again
Also when it wasn't working, I couldn't ping the phone. When I assigned the IP just now I still couldn't ping it.
When I did a tracert to it, I could get to it when the IP was assigned and when it wasn't.
I have no removed the assigned IP for the phone from the router. Wifi connection is still working after disconnecting/reconnecting wifi on the phone.
I can also now ping the phone, where as before it was getting timeouts.
Also when it wasn't working the first time when I did a tracert it was showing up as HPsomething (didn't make note of the numbers)
this time when it is working it's just showing up as the IP address when doing a tracert.
Another update:
Just checked my printer, it has an IP address manually set on it, which at one stage when the phone wasn't working for internet it had the same IP as the printer, hence when tracert'ing it I was going to the printer instead of the phone and getting the HP etc back.
When it wasn't working at that time and looking at my routers DHCP list, it had the MAC Address of the phone against the IP that the printer has....
So I've got some issues with how my own network is setup ^_^ which looks like is causing me grief.
So the issue is with DHCP? Setting a static IP fixes it? I'll have to try, but I doubt this is a problem with the network, as all my other devices use DHCP without this problem.
I have the exact same problem!!
It's really annoying.
i was having problems with wifi too.. it keeps scanning and checking, etc, signal dropping for no reason..
fixed mine..well for me it worked
backup ur phone ( i dont take responsibility if ur phone catches fire or dies or chases u around )
u need to be rooted
download FXR WiFi fix and rescue from market
and just run the app.
now my wifi signal stays constant speed and i get good speeds
alternatively try
WiFi Fixer
both of them will cause high battery usage..i think since it keeps the signal at maximum.. so only enable wireless when i need it or use juice defender or green power.
greenpower seems great. using this at the moment

Is wifi in webOS supposed to be buggy as well?

So I know wifi in android is buggy, this isn't a question about that.
My Touchpad won't connect to my wireless network at work. (in webOS or android) It always fails the IP configuration part. My android phone connects fine, and my laptop, and my iPad.
Kind of kills the usefulness of the tablet for me. Wondering if I should call up HP before my 90days are up.
Thanks in advance
I have had no issues with webOS 3.0.2 or 3.0.4 at work or home (and I run a number of access points at both locations). Always connects by itself everytime. Too early to tell with 3.0.5 but no issues so far.
Have you tried other routers? It could be just some issue with your router. Have you tried to manually assign an IP, I know you can in android.
spunker88 said:
Have you tried other routers? It could be just some issue with your router. Have you tried to manually assign an IP, I know you can in android.
Click to expand...
Click to collapse
It connects to my home network fine, just not the work one. Tried manually assigning an IP and that didn't work in either OS. Going to install the update to webOS and see if that fixes things.
As poster above mentioned, corporate/work networks seem to be the only thing that webOS MIGHT not play well with occasionally. I've gotten it to successfully connect to my work's 802.1x EAP network. It actually worked quite well, but then sometimes it stumbles a bit before connecting.
For the most part though, webOS wifi works just fine. Of course, this is because HP dev'd it with the drivers they have, that we DONT have, and most likely will never have.
Wifi now connects on both OS's after updating webOS to 3.05
Lol go figure
R1ptide said:
Wifi now connects on both OS's after updating webOS to 3.05
Lol go figure
Click to expand...
Click to collapse
It hasn't before for you? I'm curious about your experience.
The deal with Wifi in android is multi-faceted:
1. Accessing the wifi options sometimes crashes the thing, and you have to force close the settings app and try again.
2. With Wifi on, the wifi menu can be quite sluggish
3. A lot of times, it wont even scan for networks. It just says disconnected for ages, or will eventually scan, then try to connect, but never get past "Acquiring IP address".
4. A lot of times it will randomly lose its connection, yet still indicate that it's connected just fine. A toggling of the wifi usually fixes this, but also starts you at square 1 with attempting to connect to an AP. For some people, this process can be a nightmare.
5. Some people simply cannot connected to their secured network at all. Period.
Are you experiencing any of these issues still?
nickmv said:
It hasn't before for you? I'm curious about your experience.
The deal with Wifi in android is multi-faceted:
1. Accessing the wifi options sometimes crashes the thing, and you have to force close the settings app and try again.
2. With Wifi on, the wifi menu can be quite sluggish
3. A lot of times, it wont even scan for networks. It just says disconnected for ages, or will eventually scan, then try to connect, but never get past "Acquiring IP address".
4. A lot of times it will randomly lose its connection, yet still indicate that it's connected just fine. A toggling of the wifi usually fixes this, but also starts you at square 1 with attempting to connect to an AP. For some people, this process can be a nightmare.
5. Some people simply cannot connected to their secured network at all. Period.
Are you experiencing any of these issues still?
Click to expand...
Click to collapse
Before update:
never had any problems with wifi at all, except it just wouldn't connect to either of my two networks at work in either OS. Neither OS could get past the IP config stage. Tried manually assigning IPs in both OS's but that accomplished nothing. Home 5ghz network zero issues.
After update:
Instant connection, no issues.

Help with this very frustrating wifi problem on my Tablet S!

Hi,
I got a new Sony Tablet S a few weeks back and I have this really weird problem.
As soon as I on Wifi and connect to my college network, it connects fine and webpages open as expected.
But after a minute or so, all data transfer stops even though I am connected to the network. Initially I thought
it was a hardware issue with my tablet but when I went to my nearest McDonalds and connected to their connection, everything
worked fine and there was no interruption in the data transfer.
I tried a couple of other hotspots around town and they seemed to work fine.
So, now obviously its a problem with my college network. The funny thing is that my laptop, my cellphone and about a thousand other devices
connected to the same network work just fine and do not stop exchanging data all of a sudden.
I have tried various apps available on the Play store but none helped.
My (geeky) friend told me that the issue may be some sort of interference between the routers (Cisco Aironet series, I think), as every floor in my hostel has 4 routers, but he could not give a solution. I have also referred the problem to my system administrator but he too could not come up with a solution.
If anyone has a solution to this, please help!
Thanks in advance
Really strange.
I have a rule that occasionally works, strange probelms can be sorted out by a restart, if not, a reset mostly helps.
Can I suggest resetting your tab if not done yet!
Sent from my Desire HD using XDA
Did both. Doesn't help.
you need to re-flash the wifi modules, which comes with the kernel usually. But I dont think that possible at the moment.
Can you elaborate?
I have the same problem with my tablet, and when I called Sony for technical support, they said that the tablet is not compatible with the router I have. Which in my honest opinion dont think is the problem.
But as a way around, what I do is turn off the wifi for few seconds and then turn it back on.
This way the problem gets resolved.
I hope it helps you.
I have exactly the same problem, unfortunately the problem is with the wifi in my home, my sony tablet connect and disconnects, or it stop transmitting after a while, but other devices (my htc phone, my tablet, ipad, iphone) doesn't have this problem.
and as you said, when I go to other places the tablet works fine.
Someone said me that the tablet is not compatible with the motorola router of my ISP
I've been searching but there is no solution, by now I turn off and turn on the wifi every time I lost internet
Thanks people, but this is hardly a solution. It means I need to turn on and turn off the wifi every 60 seconds to browse the internet. Bye bye downloads, buffering videos and installing apps through the play store
Is the Sony Tablet S the only tablet in the world that is incompatible with routers? Then Sony should make sure that its clearly listed on their website that routers from major companies are not compatible with our Tablet
I solved the problem .. at last for me,
1 - turn off wifi.
2- in accounts - turn off "auto connect"
3- turn on wifi ( test if work )
4- reconect the accounts
too simple .. but works , try it..
I am sorry but its not working (that is if by auto connect, you meant auto sync)
Are you sure you are telling the solution to the problem I mentioned or something else?
Hi, I was suffering exactly the same problem and it boiled down that was a compatibility issue with the router. Unfortunately I could not find any other solution but replace the router itself!
Sent from my Sony Tablet S using XDA
Looks like I have to do the same. except I cant make my institute change their routers
What kind of encryption are you using on your router? Try disabling the encryption and see if the problem persists.
Also, what channel are you broadcasting on? It could be a highly populated channel, try changing that if you can.
I don't know what options are available through your routers configuration page.
I will enqure with my system admin and get back.
Meanwhile, I got a workaround to this problem. There is a freeware called MyPublicWifi which creates a virtual hotspot on my computer. This hotspot works fine and I can share my router's internet through this, even though it means I need to keep my PC on while browsing on my tablet.
I have experienced exactly the same problem since I bought the tablet. The router I have at home is a Buffalo WZR-HP-G300NH2. After a very long time trial-and-error, I have found a solution to it.
(1) Router setting: Force to set the 300Mbps mode of Buffalo router to 20MHz, not auto nor 40MHz. Some routers may display 150Mbps mode.
(2) Tablet setting: Settings->Wifi->advanced->Wi-fi disconnect policy, set to "Never"
You may try it and I think this will resolve the wifi disconnection problem. As for the reason, I think it is related to 11n because I have not found any problem with 11a/b/g router yet.
Hope this helps!!

Problems connecting to some wifi networks (GT-i9100M)

Hey all,
I've had my Galaxy S II GT-i9100M for a bit more than two months now. It's been on ICS 4.0.3 since the first day I got it, and is unrooted.
Wifi was working fine the first month or so that I've had it. However, in the last month, while trying to connect to my university's networks from the wifi settings screen, it will display "connecting" for a long time, then change to "saved", without successfully connecting to the network. Odd thing is, if I turn the wifi on and off repeatedly, it may connect eventually, with around a 5-15% success rate each try. However, there's also a relatively high chance it will automatically disconnect itself within a few minutes.
The school has three main wifi networks: one is unsecured, while two are secured with exactly the same authentication methods (PEAP + MSCHAPv2) and takes the same login credentials. All three have the same problem when I try connecting. It's not a problem with signal strength, either, since my friends nearby can connect using their phone or laptop without any problems.
Here's what I've already tried to do to fix this:
Asked the school's IT helpdesk
Forget both secured networks so the phone can autoconnect to the unsecured one
Tried wifi diagnostic tools, such as Wifi Analyzer and Wifi Fixer, and tried changing to a better channel
Deselected "back up my data" in the Back Up and Reset settings screen, deleting existing wifi settings from Google's servers
Connect using a static IP address rather than DHCP. Either it has the same Connecting->Saved issue, or says something about "avoided a poor connection"
Did a factory reset, including wiping all user data
The wifi has no problems connecting to my home wireless network, and to most, though not all, other public networks I've tried (same problem as above if it doesn't work).
On a somewhat different note: there are two networks (each of which I've only connected to once at most) that are permanently saved on the list of access points; there's actually no way to forget/delete the network. They even survived the hard resets, and are listed before I link the phone to my Google account. Could this be related to the main issue above?
Is there a fix for this issue? Thanks in advance for any suggestions!

[Q] Connection issues

Hey everyone, I got myself a Z2 recently and have been very happy about it for the most part. However, some things seem to not function a 100% the way it's supposed to.
Some times after it's been to sleep and I try browsing online with it using either 3g/4g or wifi the phone says it has a connection, but nothing loads. All I have to do to solve this is to refresh the wifi/3g connection manually, and then it works. It's rather annoying to always go through that procedure every time I want to use my phone, so I'm wondering is there anything I can do about this? Or anyone experienced anything similar?
Vegard
I have the same issue with WiFi while the phone sleeps or is active (no probs with mobile data though!), but I was not able to determine whether it's my router, the phone, or a combination of the two (though I have a hunch).
When I'm in my room which is unfortunately the farthest from the router, and the connection drops, my Z2 is not able to reconnect on its own. Have to disable/enable WiFi or else it's stuck in an infinite loop of connecting and obtaining an IP.
Now, I'm fine with a dropping connection occasionally given the distance and the... quality of my router. However, my laptop is able to reconnect automatically.
I have tried lots of possible solutions: WiFi sleep policy, static IP or DHCP, disabling/enabling WiFi optimisation or Auto-IP, switching WiFi channels, and various WiFi fixer apps. Nothing worked.
My guess? There is a bug in the stock firmware that makes the phone unable to reconnect if a connection is forcibly dropped . Pair this with a crappy router and you have a recipe for inconvenience.
Unfortunately, I have no spare router to confirm this, and with the bugs in CyanogenMod I am reluctant to flash for now.
Also, I am sure this is not a hardware fault of the phone in my case since I notice this behaviour at home in my network only.
Do you guys possibly know where I could find some logs related WiFi? I wanna get to the bottom of this.

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