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I've been having issues with wifi on my tab. I visit a friends house and it won't pick up the wifi. My phone picks it up fine, laptops pick it up ect. I stand AT the router and still it doesn't pick it up.
I thought it was a 1 off but it started happening at work too. The only differenceis that is WAS working fine at work, now won't pick it up. And now I have the same issue at my parents.
Does anyone else have this issue? Does anyone know a fix?
Cheers
Try wifi sleep policy and play with the options. Mine was set to "Never" and I was having random problems. Now set to "when screen turns off", and I never lose connection, screen on or off... On the other hand your problem may be different.
/reviveThread
Can't be sleep policy as it picks up other wireless networks fine.
I was just living with this issue until it lost my Home Wifi! Now thats gone I have to turn Hotspot on my phone, which I shouldn't have to do.
I thought it might be a problem with the ROM, so I've tried Task's GalaxyTask v5.0 and I still have the same issue. Might try flashing Stock and seeing if I get the same issue.
This is doing my head in now!
I flashed 3.2 Stock (rooted) and it picked up the missing Wifi connections. The rom is full of hebrew with silly boot and shutdown animations though. Tried flashing several custom 3.2 ROMS other than that and same issue as before.
Also, added connection manually and stood next to the Wifi antenna at work. Still got nothing. WTH is going on?
I read somewhere that Galaxy tab is not able to connect to some channels of wifi.
I believe it was not working with channels above 11
Try changing the channel and check
Thanks for the reply.
My home network is on channel 3. Plus it doesn't really explain how it can work 1 sec then totally disapear forever. Also doesn't explain how it works with the stock hebrew ROM but not with any others I've tried.
Just trying to find the wireless details for work now so I can change the channel anyway.
Then go with the Hebrew Rom and select English as language
Sent from my GT-P7510
ansonantonym said:
Then go with the Hebrew Rom and select English as language
Sent from my GT-P7510
Click to expand...
Click to collapse
I'd rather have no Wifi than see that nasty looking shutdown animation.
Anyway, problem seems to be semi resolved now.
Changed my wireless from channel 2 to 12, still didn't show. Back to 2, still didn't show. Changed it to 10 and it magically appeared.
Not sure what the work one is on. Still waiting for access.
The short of it is, my Wifi crapped out for reasons beyond my experiences thus far.
The long of it. I flashed epinter's 07/25/2012 Nightly and everything seemed to be working nicely, Wifi especially. Then today, out running errands and dropped my Atrix in my Car Dock and attempted to turn on Bluetooth for the first time since flashing, and the device froze then restarted. Once back up, I tried turning Wifi back on, and the device froze again and restarted. Thinking maybe the radio driver went south, I grabbed epinter's 07/27/2012 build (epinter-cm10-20120727_1846-UNOFFICIAL-olympus.zip), and still no luck. Back into Recovery, Wiping everything and also factory resetting then flashing twice over again, boot up, still no wifi, and if it manages to seemingly fire up, the device hangs and restarts.
Within the last 2 hours (Been at this for about 12 hours now.) I grabbed Jokersax's build (Beta 0.1.0), wiped/reset/flash twice as I have before. Now as I take a breath I noticed that the Wifi Icon came up in the Notification bar, but when I go into Settings and Scan, I see none of the Networks around me. I looked under Advanced and noticed that my MAC Address is 'Unavailable' nor am I showing an IP address, even though Wifi is saying 'On'. Verified on my Router, my Phone is not connected to it.
Odd Side note, installed aLogcat just to see if I could catch any errors, and it is not giving me anything, that is, I am not seeing any logs through the app. Most likely an unrelated issue, but still a tad annoying.
Everything else seems in order, including Mobile Data (Able to access Web Pages, Market/Play Store, receive email, etc.). Just Wifi pretty much 'Lights are on, but no one is Home.'. Any suggestions on next steps?
We discussed this issue over in some other threads and conclusion is that it's a hardware malfunction Ur broadcom chip is burned,many people (including me) had that problem.
Sent from my MB860 using xda app-developers app
I need to really work on my searching, tried several variations of 'atrix WiFi cm10' and could not pin down a related thread.
But back on topic, CRAP! What I was hoping was not the case. Thanks for the reply, will continue to dig for those threads and cross fingers the chip really is not fried (doubtful but hey, people can dream right?).
Thank you for the reply.
Sent from Xoom running cm10
try making a clean install and you'll se that you won't have that problem!
Stark5 said:
I need to really work on my searching, tried several variations of 'atrix WiFi cm10' and could not pin down a related thread.
But back on topic, CRAP! What I was hoping was not the case. Thanks for the reply, will continue to dig for those threads and cross fingers the chip really is not fried (doubtful but hey, people can dream right?).
Thank you for the reply.
Sent from Xoom running cm10
Click to expand...
Click to collapse
I can't search the threads right now as i am typing from my phone-search is limited to 20-30 posts... But keywords for ur search should be : "atrix wifi error" or "wifi and bluetooth error on atrix" Several forums have this kinda threads,not just xda unfortunately ... seems like it's very often malfunction on this lovely phone. I couldn't repair my previous atrix so i bought another one.
Sent from my MB860 using xda app-developers app
imarmand said:
try making a clean install and you'll se that you won't have that problem!
Click to expand...
Click to collapse
We're talking fastboot wipe kind of clean install? Going to give that a go as a last attempt, will post results here.
Glimmer of hope tonight, was discussing the problem with a friend, went to turn on WiFi and it actually scanned and connected for about 2 minutes before crapping out. This tells me there maybe life to the chip still. Now to get fastboot to connect and try a wipe and see what happens.
Sent from Xoom running cm10
Any news on this front? I am one of the afflicted as well.
I'm having a similar issue. though my BT works just fine, no delays, no errors, no intermittance.
Wifi, I can scan for networks just fine. i click on mine to connect. it shows connecting, noting that when it says connecting the signal shows 1 bar as compared to the full set of wifi bars when scanning, i am also right next to the AP. is tries connceting for about 20 seconds or so. then goes back to saying "saved" under the SSID, other networks showing "disabled" when this happens. i originally noticed this after flashing epinters cm10. i tried flashing 37p, 36p and 30p radios with no difference.
EDIT: also want to note that i HAVE disabled the "avoid poor connections" option. and have tried setting static IP.
I flashed the same and I am unable to get my wifi to work after clean wipe, radio install or anything else that I have tried. Could software have really burned up a wifi radio????
johnmartin1981 said:
I flashed the same and I am unable to get my wifi to work after clean wipe, radio install or anything else that I have tried. Could software have really burned up a wifi radio????
Click to expand...
Click to collapse
Mine works occasionally so I don't think the radio is dead. The rom just acts like it's not there most of the time and doesn't give a mac address. Sometimes it works though after a reboot. Would flashing a different radio help? My baseband version says N_01.77.37P
I had an IP and a MAC, but no wifi internet.
Using mobile data, I downloaded Set DNS and then enabled wifi, works fine.
Now it's working but mobile data is going very very slow, it took 5min to download Set DNS.
I have a skyrocket but the "no wifi" issue is probably the same - your not getting DNS
I'm going back to CM9 for now.
+1 wifi matter under CM10
Try rebooting the router.
Experienced same issue (unable to connect, showing full bars, dropping to 1 bar when connecting and never being able to complete a connection) rebooting my router has fixed the issue. I'm not technical but it might have to do with the DNS release for addresses .. in any case unplugging my router for a bit and restarting it fixed the issue for me.
I updated to OTA jb 4.1.1 3-4 days ago
till yesterday, wifi was working normal but from today morning I see some weird problem.
When i try to connect my phone to my home's wifi, it gets connected. After that I open any internet based app, for the first time it works. then the internet stops.
I mean the wifi symbol is still there on the status bar but. it doesn't work.
I can't open any web pages, i have to turn wifi on-off to make it works, after loading one page it stops again.
But internet from the pc is working.
I tried restarting, keeping battery out for sometime, nothing happens.
What should i do?
Facing this problem first time in 5 months after updating to Jelly bean/
swapniltiwari said:
I updated to OTA jb 4.1.1 3-4 days ago
till yesterday, wifi was working normal but from today morning I see some weird problem.
When i try to connect my phone to my home's wifi, it gets connected. After that I open any internet based app, for the first time it works. then the internet stops.
I mean the wifi symbol is still there on the status bar but. it doesn't work.
I can't open any web pages, i have to turn wifi on-off to make it works, after loading one page it stops again.
But internet from the pc is working.
I tried restarting, keeping battery out for sometime, nothing happens.
What should i do?
Facing this problem first time in 5 months after updating to Jelly bean/
Click to expand...
Click to collapse
1) re-start ur home wifi router once and see
2) delete the exsisting home wifi netwrk on ur phone, reboot and let the wifi scan for the available netwrk on ur phone, then reconnect it back and see
Sun90 said:
1) re-start ur home wifi router once and see
2) delete the exsisting home wifi netwrk on ur phone, reboot and let the wifi scan for the available netwrk on ur phone, then reconnect it back and see
Click to expand...
Click to collapse
I have tried both the things already.
friendly bump
I have same problem as you have, like it took me sometime to finally figure it out. Try resetting your router. You see this small hole at the back of the router, hold & press it for about 20-30 seconds. Your router will now be restored to its factory settings, then connect your S3 & voila! your device is good to go.
I had the same problem at home once, I tried everything from wiping caches to reinstalling my rom. Turned out it was my router so yeah the guys above are probably correct.
Sent From My Omega'd Galaxy S3 ...
guys please help!
this sh*t is killing me >.<
i have tried and resetted my modem too, its no good!
xmrenegade7 said:
I had the same problem at home once, I tried everything from wiping caches to reinstalling my rom. Turned out it was my router so yeah the guys above are probably correct.
Sent From My Omega'd Galaxy S3 ...
Click to expand...
Click to collapse
Glad be of help..
swapniltiwari said:
guys please help!
this sh*t is killing me >.<
i have tried and resetted my modem too, its no good!
Click to expand...
Click to collapse
Did you ever try pressing the router hole for about 20-3- seconds? If it still didn't work, try manually input the your static IP. That worked too with me,
I don't have idea about static ip
And I've seen, while my screen is on. . WiFi remains connected and if I lock screen even for a second. .WiFi goes off
Sent from my GT-I9300 using xda app-developers app
Hi, Had same issue with WiFi, was doing my head in.
Problem for me was bad update from the OTA update,
go into recovery and factory reset wipe data, and cache, if still no luck then
your best solution which worked for me was download the full Samsung Official Firmware Stock from samfirmware (Google it)
and use odin to redo the phone.
Hope you get sorted. :good:
Go somewhere else with available WiFi, try connecting, if you succeed with no following issues, it's your WiFi router, if you can't connect to any other available WiFi, it's your phone, reflash ROM and test.
Have you tried turning power save mode off. In the dialer dial *#0011# then press menu button then WiFi then where it says on, turn it off. Be aware that it goes back on after every reset of your phone.
Sent From My Omega'd Galaxy S3 ...
---------- Post added at 05:49 PM ---------- Previous post was at 05:48 PM ----------
And as for it going off when your screen is off go to WiFi settings - advanced - and change the option about WiFi when screen off to always on.
Sent From My Omega'd Galaxy S3 ...
I have the exact issue. I tried everything here:
* Doing static ip on my phone
* *#0011# turning wifi power save mod to off
Still the issue. I didnt reset the router as my wife's s3 does not have and also this is issue is happening to other routers as well. Please help...
same issue
i have the same issue. I just bought a new S3 four days ago. Wifi of that stopped working exactly after 1 day of the purchase. Same symptoms , it worked at my home for a day and stopped on 2nd day. After stop and restart of the wifi, it again started but then after one page being opened, it again stopped. Tried "forgetting" the wifi uid , it didn't work. Stopped the wifi power saving mode, no gain. The version is stock JB 4.1.1 (came preinstalled) . On the other router, it did work but I am sure(though haven't confirmed) that it woudl stop after a day too.
After this issue, I changed my handset from the seller(original Samsung retail shop) and now, after 2 days, it again stopped today working, on almost the same time again. The same router is used by two ipods, two laptops and one HTC One X and it's working fine. I am not sure what to say to the seller now as he simply won't agree to me but the issue is clearly there. Any help please!
I too am having this problem after updating to 4.1.2. It helps to turn off the wifi then turn it back on, and but I don't want to keep having to do this.
Sent from my GT-I9300 using xda premium
Sounds like an ip related issue.. Your phone remains connected to the local network but can't find it way to the Internet (dns), right? . Try setting a static ip or soft reset the router every time it happens (turn it off and then back on). Try even locating the router somewhere it doesn't get too hot. These work for me
Sent from my GT-I9300 using xda premium
iliadis_babis said:
Sounds like an ip related issue.. Your phone remains connected to the local network but can't find it way to the Internet (dns), right? . Try setting a static ip or soft reset the router every time it happens (turn it off and then back on). Try even locating the router somewhere it doesn't get too hot. These work for me
Sent from my GT-I9300 using xda premium
Click to expand...
Click to collapse
Hi,
But this issue never came up in the ICS and with the other devices , it's working fine. Also, can you guide how to set the static IP for the GS3?
Thanks and regards
---------- Post added at 04:09 AM ---------- Previous post was at 03:31 AM ----------
Okay, did a little Google search and found how to put static IP. Gave it now but still, no joy. Ironically, yesterday , after doing a lot of search I found that I should enable "dynamic routing" on the router. I did that and internet started. Worked for the night and today morning , it stopped and now not working at all.
Any help please!
Even I have this problem on my S3 LTE version on Jelly Bean 4.1.1. Trying hard reset and changing settings on router or fixed ip on phone won't be of any help. I tried all these and the problem comes back within no time. So don't waste time. Send the unit for repair or replacement. Think of it this way, if there is a problem with your router or other routers, your other devices would also have a similar problem so suggest not to tinker with router settings. Problem is with the phone. Whether there is a problem with hardware and/or software, it's Samsung's headache to deal with. Planning to send the phone for repair shortly. Fed up with Samsung. Previously had a problem with bluetooth and screen on S2 and now Wifi. Irritating.
Sent from my GT-I9305 using xda app-developers app
S3 Wifi problem solved
i have same issue regarding i connected my s3 with my home network but unable to acess internet . i also used static ip .but nothing gona work . i also used wifi power saving mode by dialing *#0011# but fail.Then I went to coutmer care center they reinstall my phone software and when i again connect to wifi router same problem.internet still not working on my s3 but its working on my labtop,tv..i also reset my router nothing
gona work.
Then guys.i simply change my ip adress of my router and internet is gona work on my s3..i changed to 192.168.1.2 to 192.168.1.5
Just change Your Router IP Adress
Hi,
As my title said, i don`t know how to get pass this problem. Until a few days ago my home wifi connection was running smooth but one morning it`s just got stuck on "obtaining ip address". I`ve tried factory reset, changing to another JB stock rom, changing kerrnel to PhilZ v5.06.6 Safe Stock Kernel, again the same problem. Reset my wifi modem was not the answer either. Do you have any other suggestion for me ?
Thank You !!!
Allocate static IP rather than dynamic via DHCP (Google is your friend). Someone else asked this exact same question/had this exact same problem last week & fixed it by doing this.
Edit - Update your router firmware if that doesn't work, then try with both a dynamic IP & static IP again once you've done that/if you need to do it.
the static IP is for the phone or for the modem ?
EDIT : Never mind mate, I found the solution! Thanks! I changed my phones IP into static.
Good man. And good job working out how to do it yourself
You're the 2nd person this has worked for over the past week, so we'll make this the standard 'first thing you try' when people are having this problem (I will at least).
MistahBungle said:
Good man. And good job working out how to do it yourself
You're the 2nd person this has worked for over the past week, so we'll make this the standard 'first thing you try' when people are having this problem (I will at least).
Click to expand...
Click to collapse
Yes, but this is a solution only for your hot-spot at home where you can change the settings of the router, not for every hot-spot you encounter.
That's right. But you're never going to be able to fix problems like that (accessing a 'public' hotspot, etc) because you obviously don't have access to the router you're connecting to. Every now & then, something funky gets introduced to WiFi drivers in some builds of some kernels (exactly what, ??), causing problems with connecting to/maintaining a connection to some routers.
So, the problem is back... After few minutes of working, the Wi-Fi is yet again making problems. It keeps connecting to the network and then it keeps disconnecting and, while connected, the internet isn't working. In the attachment you'll see the setting I made on the phone. Is there anything wrong with them?
Then you try the other thing I suggested.
Edit - Also, what I meant when I said 'allocate static IP' is, at the router's end, tell the router to issue a static IP for that device (your phone), normally you can 'tell' the router - for device with MAC ab:01:cd:23:ef (as an example, the MAC of the WiFi adapter in the phone), allocate whatever static IP you want to use. Almost all routers should allow you to do this, I'm not going to tell you how to do it, because 1) It's not a phone thing & 2) How to do it will vary widely depending on the router.
So, after trying all software methods i found out that it`s a hardware problem. After making some deeper research i found that the faulty component was BAT500 leaking acid on the motherboard right on the Wifi circuits ( sadly this is o common problem on the s2 after going on ICS or JB ). Now i had two choices: either send my phone back to samsung service or to fix it myself. Since my warranty was gone i`ve tried the second method which was quite simple. All i had to do was disassemble my phone and clean the leaking with a brush and some alcohol, and now the wifi is working flawless.I don`t know if this is a permanent solution but i`ll try to update on the progress.
Nice work tracking down what was causing the problem Hopefully this thread gives people something to look at when they've tried everything else & it hasn't worked.
WIFI stuck in the middle..
s0higher said:
So, after trying all software methods i found out that it`s a hardware problem. After making some deeper research i found that the faulty component was BAT500 leaking acid on the motherboard right on the Wifi circuits ( sadly this is o common problem on the s2 after going on ICS or JB ). Now i had two choices: either send my phone back to samsung service or to fix it myself. Since my warranty was gone i`ve tried the second method which was quite simple. All i had to do was disassemble my phone and clean the leaking with a brush and some alcohol, and now the wifi is working flawless.I don`t know if this is a permanent solution but i`ll try to update on the progress.
Click to expand...
Click to collapse
Hi i am facing the same problem. wifi in my s2 got stuck in the middle. Its not powering on, also it doesn't show powered off as well. I am on stock rom with mods. Did nandroid backup, factory reset, complete wipe, used other roms as well but non of them worked. Could there be some hardware related problem or heating problem or problem with BAT500? How did you diassemble your phone and cleaned that acid? can you please suggest some video links on this?
Search for the Samsung service manuals. Do a Google search; appending 'XDA' to your search terms should throw up some threads here where people have attached the files to posts. The manuals detail how to do pretty much every fix they do at service centres with pics, have parts lists, detailed diagrams that show where everything is. That should help.
Edit - Please don't post to multiple threads one after the other about the same issue (you revived a >6 mth old thread in that other one you posted to).
Hi Guys,
i have a problem.
Since a couple of days, the wifi connection on my i9100 does not work anymore. I tried multiple roms but to no avail.
The thing is that the wifi connection is established, but nothing works.
I tried different roms, router resets (but the problem occurs on any wifi connection).
Any ideas?
theBIGone said:
Hi Guys,
i have a problem.
Since a couple of days, the wifi connection on my i9100 does not work anymore. I tried multiple roms but to no avail.
The thing is that the wifi connection is established, but nothing works.
I tried different roms, router resets (but the problem occurs on any wifi connection).
Any ideas?
Click to expand...
Click to collapse
may be its a problem with your device karnel version. try to use stoke karnel, i had this problem once. then i flashed stock karnel using odin. then solved
Thanks for the reply, i tried it and i am now running stock. BUT the problem still persists.
This could not be a hardware problem could it? since the wifi is connected?
theBIGone said:
Thanks for the reply, i tried it and i am now running stock. BUT the problem still persists.
This could not be a hardware problem could it? since the wifi is connected?
Click to expand...
Click to collapse
Ive had this happen to both my my Note 2 and my SGS2 LTE before that. With the Note 2, No matter what rom/stock firmware i flashed it never got better and I ended up selling it at a loss, but the SGS2 was made better when I flashed to stock then reflashed a Cm 4.2.2 rom. Maybe try that?
butthurtlocker said:
Ive had this happen to both my my Note 2 and my SGS2 LTE before that. With the Note 2, No matter what rom/stock firmware i flashed it never got better and I ended up selling it at a loss, but the SGS2 was made better when I flashed to stock then reflashed a Cm 4.2.2 rom. Maybe try that?
Click to expand...
Click to collapse
I just tried it with an CM 4.4.2 rom, that did not fix the problem. i will try to flash a 4.2.2 rom next.
Any ideas?
Given what you've already tried, flash the 3 part firmware from Hopper8's 'Odin troubleshooting' thread stickied in the General section. If you can get WiFi working on that, then reflash a more recent stock rom. If it's still working, then reflash whatever custom rom.
Might not work, but worth a shot given the 3 part will wipe your phone & might get rid of anything funky that might be causing this (don't forget to back stuff up before you flash it).
That it happens with every WiFi network you try to use is a worry though, and probably points either to something really simple we're all missing here, or a hardware issue.
MistahBungle said:
Given what you've already tried, flash the 3 part firmware from Hopper8's 'Odin troubleshooting' thread stickied in the General section. If you can get WiFi working on that, then reflash a more recent stock rom. If it's still working, then reflash whatever custom rom.
Might not work, but worth a shot given the 3 part will wipe your phone & might get rid of anything funky that might be causing this (don't forget to back stuff up before you flash it).
That it happens with every WiFi network you try to use is a worry though, and probably points either to something really simple we're all missing here, or a hardware issue.
Click to expand...
Click to collapse
I will try that when i get back from work. But i've been thinking, how is it possible that it is a hardware issue? i mean the phone still connects, something hardware related can not be partially broke right?
You'd think not (that it wouldn't be a hardware issue), but you've tried pretty much everything you can on the soft/firmware side, and it obviously isn't something on the WiFi network side unless all the WiFi networks you've tried & failed to get data flow to/from have this problem.
One thought I did have since my last post...I can't remember whether it's possible to do this on the S2 (it is on the S3/S4) as it's been months since I've even looked at mine; if you delete a WiFi connection in settings, then when you re-add it, are you able to choose between DHCP & static for IP address (might be in advanced settings if you check the box) ? If you're able to do this, choose a static IP address (I use 192.168.1.168 on my S4) rather than DHCP & see how that goes.
If that's not possible or it doesn't work, then try flashing the 3 part. Make sure you test once you've flashed it without restoring anything or installing any apps first to rule in/out something on the app side of things causing the problem.
THe 3part Odin flash did also not work. Is there a last resort solution, or is this it. Should I accept that my phone is broken
theBIGone said:
THe 3part Odin flash did also not work. Is there a last resort solution, or is this it. Should I accept that my phone is broken
Click to expand...
Click to collapse
pheraps there is a problem with your modem version. Try to flash an other modem using recovery.
isnt that what i did in the 3 step flash from hopper8?
No, it's not. There's a big difference between flashing a 3 part rom & just simply flashing a modem. However...
It won't work anyway because WiFi has nothing to do with the modem (WiFi drivers are in the kernel).
Did you try what I suggested with removing the connection in phone WiFi settings & re-adding it with a static IP (presuming this is even possible on the S2) ?
If you did & it didn't work, or it isn't possible after all, take it to a service centre or local mobile repair shop.
or just buy a new phone as i did. I will keep you posted if the static ip worked.
MistahBungle said:
No, it's not. There's a big difference between flashing a 3 part rom & just simply flashing a modem. However...
It won't work anyway because WiFi has nothing to do with the modem (WiFi drivers are in the kernel).
Did you try what I suggested with removing the connection in phone WiFi settings & re-adding it with a static IP (presuming this is even possible on the S2) ?
If you did & it didn't work, or it isn't possible after all, take it to a service centre or local mobile repair shop.
Click to expand...
Click to collapse
Holy &^#(*^ that worked! a static IP worked. How is that possible?!
The short answer ? Magic
The long/non-tech answer; the connection between the phone/router is basically dropped & constantly re-established over & over & over (we're talking about once a second or less; basically looping like that) which means you've never got a stable connection long enough to get any data flow with a DHCP allocated IP.
There's threads on here somewhere that explain it better/explain 'the why' if you're interested enough to search for them; sorry, I don't have bookmarks handy & it's 5.30am here so I'm going to bed.
Important thing is, problem solved
MistahBungle said:
The short answer ? Magic
The long/non-tech answer; the connection between the phone/router is basically dropped & constantly re-established over & over & over (we're talking about once a second or less; basically looping like that) which means you've never got a stable connection long enough to get any data flow with a DHCP allocated IP.
There's threads on here somewhere that explain it better/explain 'the why' if you're interested enough to search for them; sorry, I don't have bookmarks handy & it's 5.30am here so I'm going to bed.
Important thing is, problem solved
Click to expand...
Click to collapse
100% thanks, i've looked around on the forum and see now that you've helped multiple people solve this problem. That is great.
[FIX]
For the people that read this thread, fix the problem by applying a static IP for their WIFI and think "but what about all the public accespoints that do not allow static IPs?? Will i never be able to use them anymore?"
Don't worry
The problem is not so much the fact that the phone suddenly needs a static IP on certain WIFI accespoints, but that it needs an assigned DNS. Through some "magical" "unexplainable" reason some of our phones suddenly go broke in a weird way that everything works, but no DNS is assigned on specific WIFI spots (mostly WPA2 protected).
Solution:
Set a fixed DNS for all WIFI connections
Google Play has multiple apps that will apply a fixed DNS.
[edit] after this debacle i bought a second hand i9300. The first couple of days, it worked perfectly but soon it started to display similar behaviour as my i9100. That is when i started to look for other possible solutions for the problem. I soon found out that the Ip adress that was handed out by my router was off. it was 192.168.2.xxx instead of 192.168.1.xxx as is setup in my router settings. That is why entering a static IP solved the problem for my i9300. After restoring my router to factory settings everything is normal. My router is a Tp-link wr740N with DDWRT flashed on it. Maybe this information will also help other users
Good job digging up the DNS info, hopefully this helps people in future/they don't spend days pulling their hair out trying to fix this issue