How to Fix Samsung Galaxy SIII Wi-Fi Problems

Many Galaxy S III users are reporting problems with WiFi connectivity on the new phone, and it looks like my AT&T Galaxy S III suffers from this WiFi bug as well.

I just got the phone yesterday and already saw inconsistency using Wi-Fi with my Netgear router. There are a number of different Galaxy S III WiFi issues that hamper the Galaxy S III experience.

There are a number of WiFi issues, as documented in a forum post at the XDA Developers Forum.

While the post is quite long, the Galaxy S III WiFi problems boil down to 4 main complaints.

  • Frequent drops followed by a reconnect – this is my issue
  • Inability to connect
  • Slow speeds while connected
  • Can’t connect to either 5GHz or 2.4GHz

For users experiencing any of these problems, here are the solutions to try. Like many users fixes, these solutions will not work for every Galaxy S III.

For my issue – frequent drops and reconnects – I just connected to a different frequency. My router offers both a 5GHz and 2.4GHz connection. I was using the 5GHz 802.11a/n connection on my router. Switching over to the 2.4GHz 802.11b/g/n connection fixed the problem for me, so far.

service mode - turn button to off

A second solution some users tried involves opening the Phone app and dialing *#0011#. This opens a special “ServiceMode”. From here, tap the menu button and go into WiFi and then hit the ON button to switch it to OFF. Hit the back button twice to exit the screen.

Advanced wifi settings

A third solution that might help in addition to doing the above includes turning off a couple of Wi-Fi settings. Go into the Advanced menu from the Wi-Fi settings on the S III and uncheck Network notification and Auto connect.

Uncheck wifi settings

So one, two or all three of these fixes may work for users experiencing any of the Samsung Galaxy S III Wi-Fi connections issues. If not, then contact the tech support people for the phone’s wireless carrier and demand a solution. Many users reported at XDA that a replacement handset fixed the problem.

72 Comments

  1. CW

    07/12/2012 at 2:35 pm

    I have 2 questions.

    My wifi works fine at home but once I go to say a Dr’s office or any place of business, I get no connection at all even phone service. Dead! What setting should be used?

    Is it better to use “auto” instead of 5ghz or 2.4ghz?

    Reply

    • Morne

      07/15/2012 at 7:23 am

      Switch on” mobile data “

      Reply

      • CW

        07/15/2012 at 8:19 am

        What is the “mobile Data” on/off switch for?

        Reply

        • John

          07/16/2012 at 8:56 am

          It allows data to be pulled from mobile network. Off = no data connection over cell network. On = data over cell network.

          Reply

        • Tony Larsen

          09/12/2013 at 12:35 pm

          it is to turn off or on 3G/4G internet.

          Reply

    • Annsh

      06/04/2013 at 11:39 pm

      No need to do anything, you have to put just your WIFI password which you have set for a AEP or TKIP.

      Reply

  2. Stan S.

    07/19/2012 at 2:17 pm

    Just a couple more items:

    1. Update your router firmware. While I use DD-WRT, I updated to the March 2012 EKO version of Mega for my 610nv2, and the connection is more steady but the phone doesn’t always like to connect.

    2. While the phone doesn’t like dual encryption, it does like Mixed protocols, so G+N on the 2.4 bands, A+N on the 5Ghz will keep you connected more often.

    3. ATT modem update that came with the OTA earlier this week appears to make networks look less powerful than they are, and has increased the power output of the wifi 10% (IMHO/examination of my router’s reported signal strength. As a result, I don’t have to turn off the service menu powersavings or hotspot/open notification. The phone’s regular powersave being off is sufficient (YMMV).

    Reply

    • roc

      07/31/2012 at 2:17 pm

      When you say router firmware your talking about the router at home correct? How does this solve the issue where certain locations signal strength is so weak you can’t connect to wifi?

      Reply

      • Stan S.

        07/31/2012 at 2:34 pm

        Well, is your router in an optimal position? High rather than behind other items on your desk. Is it’s signal masked by metal ductwork or refrigerators and the like?

        If it has antennae perhaps you can do the foil/tin cup fixes found on the web to redirect the signal.

        There’s always a range extender if you have an old router laying about.

        If none of those things work then the *#0011* as a last resort.

        Reply

  3. pbarron

    08/04/2012 at 12:26 am

    So I did the *#0011# to turn the wifi off. It still didn’t fix the problem. I went back in to turn it back on, and now my wifi isn’t turning on at all. Any suggestions??

    Reply

  4. Kuba

    08/17/2012 at 8:55 am

    Im from Poland so my english might not be so good, but i hope to help you.

    I writed to samsung and ask about help but they said me to go shop/t-mobile and ask for warranty. I was sure that its a software problem, so i decided for reinstal softrare

    I solve the problem !!
    I bought SGS 3 in T-Mobile but my solution works for everyone !
    1. Hard reset for device
    2. Download ODIN and download this link (its a software)
    https://hotfile.com/dl/164641212/ab9b296/GT-I9300_BTU_I9300XXBLG8_I9300OXABLG8_I9300XXLG8.zip.html
    3. Unzip downloaded software.
    3. Run ODIN and go into Download Mode on SGS3
    4. Plug in device
    5. In PDA browse this *.tar or *.MD5
    6. Click Start and wait for program.
    7. Close ODIN.
    8. Download a Modem for a new software
    http://www.mediafire.com/?zyef8nbdnfnt126
    9. Unzip this.
    10. Run ODIN and go into Download Mode on SGS3
    11. Plug in device
    12. In Phone browse “modem.bin”
    13. Click Start and wait for program.
    14. Enjoy your new SGS3 Without brand, WiFi and Battery Drain Problems ;)

    I tested it on my SGS3

    Remember that you do this for your own risk.

    Reply

    • Krakers

      10/02/2012 at 6:52 am

      Hej Kuba

      Your fix worked for me. BIG thanks from Australia! Wielkie Dzieki! :)

      Seriously guys this was the only fix that worked for me (Telstra branded phone in Australia – I think its the international version I9300-GT)…the *#0011# power save didn’t work, assigning a static IP didn’t work and adjusting the wi fi sleep settings didn’t work either.

      Now running JellyBean 4.1.1 with working wi-fi (FINALLY)…although Skype seems to play silly buggers with the connection …hmmm

      Reply

    • QJ

      01/15/2014 at 3:23 pm

      Kuba

      The download link you provided above does not work. It says the site was shut down for copyright violations.

      Reply

  5. Steven

    09/10/2012 at 11:40 pm

    I have no probs with wifi on My s3 .. it’s set to auto, and despite a slightly longer than usual connect delay (5-8 secs) it connects to My dual band router on 5ghz at 150Mbps :)

    Reply

  6. alberto

    09/11/2012 at 1:11 pm

    What keyboard is that on the pic on the article?

    Reply

  7. Noel

    09/16/2012 at 9:56 pm

    How do you change your router frequency

    Reply

    • Steven

      09/16/2012 at 10:37 pm

      you don’t change frequency.. you activate desired frequencies

      if you have a dual band router, then you should see config settings for both 2.4 and 5 GHz

      Reply

  8. Emrah Binatli

    09/24/2012 at 10:15 am

    It has to do with Power Savings mode, when I took it off WiFi started to work.

    Reply

    • khrysta

      02/12/2013 at 5:48 pm

      this fixed my issue instantly :D thanks.

      Reply

  9. Sammi

    10/02/2012 at 5:32 am

    i have the same problem for my S3 Wifi, i tried *#0011# it still the same… can’t connect to wifi, it keep on connect and disconnected… any solution to solve this problem?

    Reply

    • Michael

      10/08/2012 at 11:22 am

      yeah, get Iphone! Seriuosly ! I got the S3 just recently and I’m utterly disapointed that the allowed a product with that poor quality. That wifi doesn’t work is totally unacceptable! I’m going to give another week then if it doesn’t work I’m changing to Iphone, not that I ant to but I would like a phone that works.

      Reply

      • Kirsty.

        04/11/2013 at 4:51 am

        My mum has an iPhone 4S and she gets the exact same problems with wifi as I do on my SGS3.

        Reply

    • jay

      10/24/2012 at 2:14 am

      Hey i had the same problem so i rang up samsung and they told me to turn off my wifi then press n hold the home button then clear everything n click on task manager then close all aplication then click on ram at the top and then clear memory then turn your wifi back on it worked for me although i have to keep doing it once a week

      Reply

      • khrysta

        02/12/2013 at 5:50 pm

        i did this along with turning off my power saving mode. fixed it instantly.

        Reply

      • Paul H

        03/09/2013 at 7:59 am

        Worked perfectly – thank you!

        Reply

  10. narinder d

    10/02/2012 at 8:17 am

    JUST BUY A IPHONE 5 , SOLVES THE PROBLEM GUYS . SAMSUNG HAVENT A ANSWER . i sold my s3 as samsung wont acknowledge this issue with wifi drop out .i bet you that the 4.1 jelly bean update wont fix it

    Reply

  11. Kobie

    10/03/2012 at 10:47 am

    I had the same problem and fixed by goin into your router setup under WAN, change the defual user name the same as your internet login name, change the password also as your internet password, apply your new settings and save the config on the router. Restart your PC and modem and the problem should be fixed

    Reply

  12. Mike C.

    10/06/2012 at 7:47 am

    I had the same problem and none of the above fixed it. I went to Samsung service centre and they checked my firmware. The version I had does indeed have a known wifi issue as above. Even though my phone said no updates were available there is a new version of firmware “LH1” They updated my phone and all is good now. Go see Samsung service they will fix your problem without any of the above tricks. Just remember to backup first.

    Reply

  13. WK

    10/23/2012 at 3:48 pm

    Hello,

    I have a question. I am on a limited data plan. Does the S3 automatically switch to using the WiFi connection when connected to it or should I switch my data services off first?

    Please reply ASAP,

    Thanks

    Reply

    • khrysta

      02/12/2013 at 5:47 pm

      automatically as long as your wifi is turned on.

      Reply

  14. Robert Andrews

    10/25/2012 at 3:31 am

    FYI – I experienced this, too.
    I just updated to Jelly Bean and am seeing a stronger WiFi indicator in the notification bar.
    This morning, in my bedroom, the other side of my house from the downstairs Virgin Media SuperHub router, I was seeing 0-1 bars and a 6Mbps WiFi connection.
    After the update, I’m seeing 2 bars and 13-26Mbps.

    Ironically, the Jelly Bean update took about 15 minutes. for only around 264Mb.

    This is on a SIM-free unbranded S3, over-the-air update.

    Now if only I could cure the terrible GSM signal the same way.

    Reply

  15. Andy

    11/07/2012 at 7:45 am

    lol at the ppl saying to ditch the s3 and buy a rubbsih iphone, why would anyone want one if those things! oh and I’ve never had any issues with the wifi on my s3, connecting to my 5ghz network at a nice 150mbps.

    Reply

  16. Kennedy

    11/07/2012 at 9:36 am

    Hey guys i have this problem with my s3, when i connect with wifi in a public place like the library. everyones device around shows on my phone. Like i can see other peoples pictures on my phone, and that makes my gallary slow and my music slow too. Now i cannot connect with wifi and listen to music because when i click on a song it takes forever to play unless i turn off wifi. plese reply if u got a solution for me. Thanks

    Reply

  17. Eric

    11/09/2012 at 5:05 pm

    I fixed my wife’s slow wifi problem on the Galaxy IIIS when I noticed it was trying to use the same ip address (192.168.1.11) as another wifi device on my router that was set as static on 192.168.1.11. I switched that other wifi device to another static ip address other than 192.168.1.11 and now the phone and device works. It looks like the phone tries to use ip addresses that sometimes are already used by other devices. Just a thought.

    Reply

  18. DJE

    11/09/2012 at 5:57 pm

    Maybe it’s a simple translation error.

    After trying numerous suggestions and entering my network password many times, I tried entering my network encryption key in the phone’s network password field.

    Shazam! Works great (at least for the moment).

    Reply

    • musashi

      11/10/2012 at 9:09 am

      where would I find that at?

      Reply

    • Tanya

      02/05/2013 at 10:13 am

      WORKED! Thank you!

      Reply

    • Jim Ferguson

      05/11/2013 at 7:41 am

      OFS! Worked instantly! Thanks. I had tried most of the other suggestions with no luck. Shazam indeed !
      (Verizon Samsung S 3)

      Reply

  19. musashi

    11/10/2012 at 9:04 am

    I’m also having problem with my WiFi to works everywhere else but not in my home its like that video up top just keeps scanning and never logs on. I went into At&t where I bought it and they said its your router or your cable company and I knew its not my cable company and it not At&t but its the phone with the problems.

    Reply

  20. texasshiva

    12/27/2012 at 2:20 pm

    Just got updated to 4.1.1 on Verizon and now I can’t even find the service mode (*#0101# doesn’t work…nor do any other code).

    Does anyone else have this issue?

    Reply

  21. Francisco Sanchez

    01/01/2013 at 1:50 am

    In last ice cream sandwich update, the option to choose between wifi frequencies has been de-activated. Anyone know how to solve it?

    Reply

  22. khrysta

    02/12/2013 at 5:44 pm

    i did 2 of the peoples on heres ideas turning off the power saving and going in and clearing all the active running tasks and the ram. didnt even turn off wifi… running just like if i was on 4g :D…. Thanks

    Reply

  23. Alex

    02/17/2013 at 1:48 pm

    Same error still occurs on my Note II with 4.1.2 on it. …. Going with a static IP address helped and turning the power save mode OFF did it for me.

    Reply

  24. lolipopoff

    02/25/2013 at 8:24 pm

    i have a problem because i try to slide the wifi on and it keeps going to the off button does anyone know what to do please help!. thank you

    Reply

  25. Kiefer

    03/22/2013 at 12:42 pm

    I LOVE YOU!!!!!!!!!!!!!!!!!!!! The Service mode thing has worked for me thank you sooo sooo much, I have been having this problem since i got the phone from about a month after it was released!!!! :D x

    Reply

  26. ur mother bb

    04/06/2013 at 10:45 am

    Kevin Purcell, u r ugly as a pig

    Reply

  27. John

    04/26/2013 at 9:30 pm

    Got mine working by setting a static ip on the phone and updating the router to reflect
    Have not had any issues since. Seems when the s3 is asking for an ip it never fully syncs to the network kind of like the old issue with the droid bionics..

    Reply

  28. M Omar

    05/05/2013 at 9:57 am

    I am also facing a problem with my new S3 that it doesnot connect to any of a wifi network and the problem lies somewhere in the wifi.i am using WPA and it doesnot connect to any of the router Ive done a factory reset as well but the problem still persists. The main problem which it has is it connects to a network but suddenly stucks onto acquiring IP address and then it doesnot connect meanwhile if u turn off the wifi while it is trying to obtain the IP address the fone automatically restarts. i need some kind advice as to how it needs to be fixed.

    Reply

  29. Musthaq ali

    05/18/2013 at 12:49 pm

    hi, i have a poblem with my S3, i did a factory reset from that day cant connect to wifi, once you click on connect it request the password, once you enter the password it says password error, i tried in many places but same results, i made sure that the password enterd was correct , my i phone works…

    Reply

  30. Babu Samuel

    05/24/2013 at 4:28 am

    I have a problem with my S3 phone dose not holding Wi-Fi connection it is connecting and immediately off again connect and off not holding Wi- Fi net work

    Reply

    • RL

      11/26/2013 at 10:29 pm

      My S4 connects to my wifi with no problems. For my S3- I tried everything here; then found somewhere else to type in my password in all capital letters. This worked for me (my password does not contain capital letters at all and I am able to connect to everything else okay). Hope this helps.

      Reply

  31. Sam

    05/25/2013 at 3:57 pm

    Hi i have problem with my samsung s3. Its new and i cant find my wi fi conection,i make refresh many time but I couldn’t foun eny connection,please help me.

    Reply

  32. Micael

    06/06/2013 at 9:44 pm

    So I had the Wifi problem and none of the tricks would make it work. What finally made it find my wifi was to take out the SIM card and do a factory reset. Voilá the wifi is back. Some 10 hours after you put back your SIM it will be gone again though..

    Reply

  33. jas

    07/09/2013 at 4:36 am

    hi was having same problem as many of you with my s3 i could connect to wifi but not the internet what finnaly fixed it was to change my ip address on my wifi conection first made it static and then added a few extra numbers to address worked straigt away

    Reply

  34. elise

    09/29/2013 at 6:31 am

    My wifi setting isn’t workin. I type my routers pw in and it says authenticating n as it connects it says disabled. My woifi works fine other places and mums connects fine to wifi… this is bever been an issue til I factory re set my mob… help me plz email me at [email protected] im stuck… n boda have no bloody idea wtf they r doing..

    Reply

  35. tanyanasser

    10/12/2013 at 10:18 pm

    my wifi doesnot open at all whatever I do it z locked and my ip z unavailable

    Reply

  36. reza

    12/06/2013 at 3:27 am

    worst and unhelpful after sales service, i f… will never advice anyone to buy a samsung and neither will i ever , after trashing this junk phone s3 which has a samsung created bug which surprisingly they are unable to change .this problem arose after factory reset . wifi simply does not connect.
    these guys lack behind iphone customer support which is prompt and no nonsense insane reasons for ineffeciency.

    Reply

  37. Ernest

    02/19/2014 at 7:32 am

    my wi fi has being saying turning on for two weeks now. . i cant fix it. how do i do it

    Reply

  38. Fido

    04/01/2014 at 1:00 pm

    I turned off the power saving settings and……bam! After not being able to connect to Wifi since I got my Samsung tab 3, I immediately was able to connect. We’ll see how long it lasts for.

    Reply

  39. Ubiane

    05/08/2014 at 1:18 pm

    My problem is the opposite of everyone else’s. I use my samsung slll mostly for phoning and have minimal use of internet (the odd e-mail or weather forecast) but I am charged every month for wi-fi connections that the phone has made on its own account at all hours of the day or night. Why, and how do I put a stop to it?

    Reply

  40. Alin R

    05/11/2014 at 8:19 am

    I had same problem with my S3 AT&T.I fixed the problem after I forced stop “AT&T WIFI Hot Spot” application. I was so close to do factory reset.
    The smartphone is working fine since then.
    I hope it helps.

    Reply

  41. Brock K

    06/05/2014 at 7:11 am

    I performed all three of these fixes as advised and it resolved my problem. Note, the step for finding your ADVANCED wifi setting may be different, mine required pressing the menu button then selecting advanced.

    I don’t know which one or combination fixed the issues, but I now have access to my wifi enabled ION AirPro camera which has been unable to connect since January 2014. It had worked prior to that. I had been thinking it was either a faulty wifi card in the camera until my household internet started become unreliable to the point where the last few months I couldn’t connect at all.

    Thanks so much Kevin for your post.

    Reply

  42. Burgos

    07/07/2014 at 3:49 am

    i dont know if im a little too late but here are some solutions i discovered from my search for a fix

    1. Try forgetting your network. Then turn off your device and take out your battery and insert back. wait for a few mins then turn on your device and finally connect to your network again

    2.goto phone and dial *#0011# and you will enter service mode. press the options button goto wifi. turn off wifi power saving mode

    3.forget your network and turn off your device. after u have turned it off, hold the volume up, home and power button all together. once your phone turns on let go of the power button but continue to hold the two other buttons. you will enter an android recovery screen. navigate using volume buttons and power button. do “Clear cache partition” or something and then reboot device. reconnect to network

    4.goto your wifi and goto your list of available networks. Forget the one you are using then reconnect but this time hold onto the network that your are going to reconnect to. choose static and re-enter the details that you see (might be in the background) put your password then reconnect.

    P.S im using a samsung galaxy s3 so these might look different sorry.

    if it only occurs on your mobile device and it does not affect any of your other devices then it might be cause of a ip address conflict im not sure. If this is the case then your last resort is try resetting your device first and if no go then reset your modem

    Reply

  43. Emrys Rdz

    12/29/2014 at 7:07 pm

    hola no me funciono se sigue esconectando mi wifi cuando se apaga la pantalla ayuda que hago

    Reply

  44. lynn

    02/15/2015 at 2:47 pm

    How do I BLOCK the wifi on a samsung galaxy S3 so it wont connect to internet?

    Reply

    • Cory Gunther

      02/16/2015 at 9:35 am

      Just turn off WiFi in settings

      Reply

      • lynn

        02/17/2015 at 6:49 am

        Thats the only way?

        I mean like block it PERMANENTLY….
        I had to update my sons phone to one with a SIM card…on his old phone it had Data Blocker so there was no internet on it at all.

        Theres Data Blocker on this one also but him & his friends are still accessing through wifi and someone told me awhile back that wifi can be blocked but I havent talked to that person in over 6.5mths now.

        So is there a way to do that?! Please!!

        Thanks

        Reply

  45. krey sorphoun

    08/04/2015 at 2:00 am

    hi friend my phone can not connect wifi I tried to do ( *#0011#) it still can not connect again , who can tell me friend I think all friend will tell me about it . thank you.

    Reply

  46. Joseph V Mathew

    08/21/2015 at 12:26 pm

    This worked for me!
    “opening the Phone app and dialing *#0011#. This opens a special “ServiceMode”. From here, tap the menu button and go into WiFi and then hit the ON button to switch it to OFF. Hit the back button twice to exit the screen.”
    Thanks,Kevin Purcell!

    Reply

  47. Dejesus

    08/30/2015 at 4:42 pm

    I continue having issues. I’ve tried everything you guys posted here. Our neighbor shares his wifi with my husband and I. I never had issues connecting to his wifi until a couple of weeks ago. My laptop connects to the wifi with no issues as well as my husband’s phone. What else can I do to be able to connect again to the wifi? Thanks in advance for your help!

    Reply

  48. Emma

    02/24/2016 at 5:40 pm

    This did nothing for me

    Reply

  49. Etchell

    04/18/2016 at 7:37 am

    I have a samsung S3 Duos and my wifi panel isnt turning on. What should I do?

    Reply

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