Iphone wifi drop out fix – DNS

Posted by Madbot on Jan 2, 2009 in Techno |

Madbot says:

Since getting the iphone I have been loving all the apps (free) available. But one thing kept bugging me. The wifi would cut out after some time or some app hopping. It’s easily fixed by reconnecting wifi on the iPhone but it was getting very annoying.

Interestingly it was happening to the wifi at home but not the more expensive wifi hubs at the office. It’s not an issue with ip conflict. The wifi remains connected but safari and other apps trying to connect to the net would come back with server timeouts. And wow, plenty of people complaining about the same problem..

Well I found a fix. It appears the phone has an issue with DNS. The phone was already configured to static ip so I know there are no issues with dhcp, with the router IP set as the dns on the iPhone wifi connection. Apparently that was the problem. A few forum posts suggested using an opendns server as DNS to solve this problem. I was skeptical but I was out of options on what I can change on the wifi router config. So I changed the iPhone wifi DNS to which is an opendns server and viola! It worked.

It’s been running great for over a week now. If you have connection issues with wifi, I suggest you give this a go.

So the specific steps:

1. Connect to your wifi point (the one you’re having problems with) with your iPhone as per normal.
2. On the iPhone, Open Settings, Wi-Fi (it should already be connected to your wifi point)
3. Click on the > arrow next to your connected wifi point to see its settings. You may have DHCP or Static, unless you have some special network settings (which you then know what to do already), don’t worry and just go with what you already have set.
4. Click on DNS lower down the page and type in “”. Save and exit.
5. Browse a few pages over wifi and check if the connection is stable. Good luck..!

Update (2010/10/14): readers Guy and Peter Vroom have kindly commented that if the above method does not fix the problem and you are using WPA2 for wifi encryption, try downgrading to use WPA. It may work for you.

Update (2011/6/14): readers Bec found an oldie but a goodie – check your router firmware for updates. An update will probably fix the problem. It did for Bec.

If you find this entry useful or can do with some additional info, leave me a comment.

You can also help me support this site by clicking on the Facebook “Like” or the Google “+1” button :) Thanks..!



Jan 29, 2009 at 5:14 am

Madbot thanks!!!

This fixed my problems. I always had to turn WiFi OFF then ON to fix it.

Now my router uses the OpenDNS servers.

It’s quite strange though. My DNS worked perfectly well with my PC, I never had any issue.

What could be the reason for the iPhone not to work with my ISP’s DNS?

Jan 29, 2009 at 9:15 am

To be honest I don’t know either.. It feels more like an iphone bug in its wifi driver/firmware.

Glad to hear you were able to fix it :)

Feb 8, 2009 at 3:54 pm

Had the same problem that continues with the OpenDNS service on my Macs. I have to change the DNS server, every once in a while. Wondering what could be the cause. Drives me nuts.

Feb 21, 2009 at 5:26 pm

I got my iPhone on Wednesday and have been having constant Wifi drop outs. To fix it, I can either restart the iPhone or turn off WiFi then turn it on again. I changed the DNS server to and the internet started working again, no restart of the iphone or wifi. Thanks!!!

Feb 21, 2009 at 5:57 pm

Hi Kieran, that’s great to hear. Glad it helped..! :)

May 26, 2009 at 9:53 am

That helped get my wifi working on a 2G phone. Thanks

Jul 27, 2009 at 2:16 am

Alas, it didn’t work for me. Wifi dropped not 2 minutes after trying this, sitting all of three feet from the router.

Annie A
Jul 30, 2009 at 2:27 pm

WOW Thanks!!! I thought i had tried EVERYTHING. I was *this* close to smashing my iPhone.
This fixed the problem. It connected automatically to my home network, and so far wifi hasn’t dropped.

Jul 30, 2009 at 4:12 pm

Hi Paul – Sorry to hear the lack of success. Maybe worthwhile to make sure that the IP setting for the wifi was saved properly. I had some trouble with mine initially (from changing it constantly trying to make it work).

Hi Annie – That is great news..!! Glad you found the info to be helpful. :)

Sep 14, 2009 at 7:51 am

AWESOME. I have been struggling with this ever since I ugraded from my 3G to my 3GS. Thank you so much.

Oct 7, 2009 at 11:54 am

WiFi had always worked perfectly for me at home, I’ve had the phone about a year and had pre-v3 software initially installed. Have upgraded to v3 over time, everything was still fine.

Yesterday I dropped the iPhone and the sim card popped out… no problem, just put it back in and hard rebooted. Uh oh… everything worked EXCEPT THE WI-FI AT HOME. But wi-fi at work was still fine. Huh? That one really left me scratching my head.

I tried this fix, put in a static IP (used to use DHCP) and the opendns server. Viola… the problem was fixed.

So… i figure the sim card reset / reboot wiped out some setting originally made by the pre-v3 iPhone software. Now that I have the latest software installed, it just can’t connect to my home router easily anymore. Wow… way to go Apple. Breaking customers with every software upgrade. Nice.

Nov 1, 2009 at 2:34 pm

Thank you sir, this worked for me!

Nov 21, 2009 at 6:02 pm

Worked for me, thanks! Also with my IPS’s DNS IP entered. 😉

Nov 22, 2009 at 6:24 pm

Many thanks Sagios..!! :) Glad to hear it worked for your iphone.

Dec 24, 2009 at 8:09 am

Hey there, I followed your advice.
It seems to still drop down to one bar randomly
pretty annoying to say the least
not sure if the connection gets lost anymore, but it definitely still drops down to one bar
Why haven’t apple addressed this issue I do not know

Jan 20, 2010 at 12:37 am

How do you change the iPhone wifi DNS ???

Feb 11, 2010 at 7:00 pm

well it seems work fine for now…but havent tried further yet!
anyway thanks for your help! U da Man!!! : )

Feb 16, 2010 at 2:53 am

Glad to hear you got it to work!

Feb 17, 2010 at 2:53 am

I have a D-Link DGL-4300, and was having the same problem with the iPhone connection dropping off after a minute or two. The wi-fi appeared connected, but I was still unable to surf.

I tried your suggestions but was still experiencing drop offs.

I wound up changing my wireless config from WPA2 only to WPA only. According to the help files, this changes the encryption from AES to TKIP. Now the connection seems rock-solid… maybe this will help someone else.

Mar 1, 2010 at 11:41 am

I’d like to share my experience.

I had my first iPhone (8GB) working with Linksys WAG54G, flawlessly never had any problem.

When I was moving house, I lost my 8GB iPhone, luckily my insurance was able to pay me back and I acquire an iPhone 3GS(16GB), I also gave away my Linksys to my sister and bought a Billion modem and D-Link wireless router.

Since then, the wifi on iPhone starts playing up, I thought it’s the router that caused the problem, hence I sent it back to D-link and they checked with no problem. My setup of the wifi router solely serves the iPhone, coz other PCs are using wired Ethernet at home.

I purchased a new wireless router, ASUS XYZ (can’t remember the model), hope it can solve the problem, but unfortunately, i still didn’t have much luck. I never thought the problem is from the iPhone itself, coz when I go to my sister’s house, i can use wifi with no problem with my old Linksys router.

Recently I bought a PS3, and a laptop, they are connected to the same wireless network, amazingly, they work perfectly with no problem !!!

I start searching on ISP’s website, and Google to see if the problem exists on my Billion modem, but zero result on Google. Some people might have problem connecting to wifi, but I CAN STAY CONNECTED ALWAYS, just RANDOMLY error to say: cannot open URL / cannot connect to iTune store, etc.

3 months after I got my 16GB iPhone 3GS, I dropped it again and now got a 32GB, it works the same way which cannot work with my home wifi. I start questioning if the iPhone itself got problem with their wifi chip.

Until this morning, i found a website(http://tonyshen.com/?p=72), it says that the stupid iPhone only connects to the first DNS server listings out of your usual 2 servers entries, if the first one fails, it will just show the error messages i’ve been getting. The website suggests to use a open dns server instead of my stupid ISP’s. Gee, that make sense to me !!

I haven’t try if it really works on my iPhone, but I truly believe this is the reason that is making sense !! I’m going to try it tonight and will post my result here agian.

Mar 7, 2010 at 3:59 am

Sounds logical Osker. How do you switch to open dns server ?

Mar 7, 2010 at 4:59 pm

Hi Kim,

To use OpenDNS, simply specify the DNS address as the one mentioned in the post –

On the iPhone, go into wifi (settings), select your wifi connection profile, and put that set of numbers as the DNS value.

Good luck!

Mar 9, 2010 at 7:55 pm

Ta worked a treat was going crazy, rebooted everything no joy… but followed your advice and am happy to say uit works.



Apr 4, 2010 at 2:22 pm

I like your post and solution that you provided but I guess I am not lucky to use this as my iphone 3Gs isn’t letting me to change DNS address to I tried many time to change the address and it is keep brining me to old DNS address that I originally have it. Is there any other help or idea I can have it please? My Wi-fi really giving me hard time right now and I am keep loosing my net connection after few second.

thank you

Apr 5, 2010 at 3:03 am

Hi Sara,

Thanks for visiting the site. To change your DNS on the 3GS, remember you will need to choose a Static IP address and not DHCP (dynamically allocated) IP address for the particular wifi connection profile you are having trouble with.

Each wifi profile keeps its own settings so if you inadvertently changed the wifi setting while connected under a different profile, it will not have updated the DNS setting for the profile you are having problems with.

Hope this helps. Good luck..!

Apr 7, 2010 at 8:54 am

Thanks for the response!!!! I will try your guide again :)

Jun 1, 2010 at 3:27 am

Hi i am having this problem with my 3g 16gb phone. it is doing my head in!! :( been looking all week for a solution, feel like chucking this phone against the wall at the mo. I have tried putting the number in the number in the DHCP – DNS but is still not working :( PLEASE PLEASE can someone help because this is the first time i have had this phone thought i would treat myself, wish i never bothered now :( PLEASE PLEASE HELP ME!!

Thanks, Mike

Jun 5, 2010 at 4:16 pm

Hi Mike,

Please be more specific at what’s not working..

How often does the drop out occur? Does it also happen with other wifi access points, Eg., Starbucks or McDonalds, or is it only at home?

This will help us help you. :-)

Jun 23, 2010 at 11:15 pm

Works perfectly. Thanks a million. Em

Jul 3, 2010 at 4:29 pm

Thank you for the solution – it works!! My new iPhone 4 was zapping up data on 3G due to dropping connection with my wifi.

Jul 7, 2010 at 1:22 am

I’m in Afghanistan and bought a used iphone 3G. Besides the fact my internet connection is slow and unreliable. I erased and reset the phone to ensure any problems would be fixed. Then It wouldn’t turn on. Took 4 – 6 hours each time I tried restoring and updating through itunes, every time it would time out towards the end of the download. Finally downloaded unlock files which had a restore file. Was able to restore from that. Then to finish the unlock process I had to connect to wifi. That’s when I ran into the issue with connecting to the internet. My laptop is online with the network, not an option to reset or change network. Finally found your DNS fix. I love mac but they aren’t always as user friendly as they’re supposed to be. Thanks for the fix!

Aug 20, 2010 at 9:32 am

i was having the same problem not being able to conect to wifi. i changed the DNS as you said and now conects perfectly, only problem now is i cant use safari as it says it is not connected to the internet, any ideas about to fix this?

Aug 21, 2010 at 11:30 pm

Hi Trent,

When changing the IP setting, make sure you retain other parts of the IP configuration like the gateway – this is usually the router address.

If in doubt, check your original IP settings and change only the DNS settings. Keep other settings identical to the original IP settings.

Hope this helps.

Sep 11, 2010 at 10:11 pm

This did not worke for me. :(

Sep 29, 2010 at 8:33 pm

I’m not IT friendly so didn’t understand much of what you were saying. I did manage to copy and paste the numbers into the correct box and hey presto! Sorted! Thanks so much

Oct 6, 2010 at 6:04 pm

Same issue w/IP4…worked perfect!!! Thanks

Oct 8, 2010 at 1:47 pm

Thanks a millions, I was annoying about my IP4 keep asking me to re-enter my wifi password.

Oct 10, 2010 at 5:54 am

Thanks for all the posts!
Had this problem ever since started using the iPhone 4 with 2 different home wifi routers.
Changing the DNS didn’t help, but downgrading the encryption from WPA2-AES to WPA-TKIP solved it (an hour of intensive surfing on multiple apps works great).

Oct 11, 2010 at 9:03 pm

Thanks, this has worked for me on the IP4 and also my old 3G one.

Oct 11, 2010 at 9:05 pm

also have noticed that the speed has increase, in terms of pages loading or app response time that require internet connect

Peter Vroom
Oct 14, 2010 at 11:39 am

Thanks for taking the time to post this info.

iPhone 3G from ~3.0.1 to 4.1 after which my home network D-Link DIR-825 connection kept dropping out every few minutes. Other connections were fine. Tried the above, tried restarting, resetting network settings (that hurt because a bunch of other passwords are now lost).

None of these worked so I deleted the connection and joined manually (other network) setting WPA instead of the default (which I think is WPA2) and it seems to be working now.

Oct 14, 2010 at 1:20 pm

Thanks for the comments..! Post updated with the additional tips. :)

Oct 24, 2010 at 10:11 am

I work at a hotel where there are several routers and wifi networks. (ex. HotelWifi2, HotelWifi3…etc) I recently got the iphone 4 and initially the wifi connect at work was great. Started not being able to connect…..FRUSTRATIONNNN!!

Luckily this lovely page came up on google….so grateful for this info!!

Switched the DNS to on one network…nothing….turned wifi on and off….still wasnt working. Switched it on another router turned wifi off and on and YAYYYY!!!

Great connection! Hope it keeps going strong. Thanks Madbot and everyone else. Didn’t seem to make a difference between using Static or DHNS. Good luck everyone!

Oct 28, 2010 at 3:07 am

I had the same problem with my iPhone 4 dropping my wifi after 5 minutes. I just changed the wifi settings to static ip and I put that number down in DNS. Now it’s working fine and not dropping! Thanks :)

Nov 4, 2010 at 12:49 pm

Hm… If it doesnt work with WPA2, then there is no point in using this, since I dont plan on downgrading from WPA2 to WPA 😛

I changed from WPA2-AES to WPA2-TKIP though, and it seems to work fine now… No need for OpenDNS or anything of the sort… Would rather have Apple fixing the problem with AES though :(

Nov 13, 2010 at 2:02 am

Here’s a question: I used to be able to connect fine on my 3GS 16GB (OS 3.1.3) but about a week ago, I was no longer able to discover the network at all!

I can confirm that the network works as my two Dell computers can connect, as well as two MACs. But not my iPhone. I can also confirm that my phone connects flawlessly to any other networks, but it cannot discover the one here.

Any idea what might cause my phone to know longer discover/recognize a network that is running fine and that it used to connect to?

Nov 16, 2010 at 3:39 pm

Hi Josh,

This may be a silly question, but does your wireless network publish its SSID?

Try setting up the wireless on the iPhone as if the wireless network is invisible (ie. not publishing SSID) and see if that solves it.

Sometimes, a reboot of the wireless router also helps…

Good luck..!

Nov 17, 2010 at 4:38 am

Hey thanks for the reply. Yes, the router does broadcast its SSID, and my PC can still find it (as my iPhone USED to). But even if I manually enter all the info, the network “cannot be found” on my iPhone. It’s as if the network is actually blocking my iPhone.

Is this even possible?

Nov 21, 2010 at 12:39 am

Hi Josh,

I assume your wireless router only has 2.4ghz radio? Some newer wifi routers have both 2.4ghz and 5ghz radios with the 5ghz radio usually serving the 802.11n protocol. iPhones (including iPhone 4) do not have the 5ghz radio and therefore will not be able to connect if you have wifi router set to broadcast on 5ghz radio.

Try checking and changing the radio, channel, and protocol setting on the wifi router. Set it to 802.11g and see if you get any success. Change to a different channel. Etc

Hope you can work it out. :-)

Ned Robinson
Dec 2, 2010 at 4:51 am

Thanks, Madbot! This fixed my iPhone WiFi problem. I am using WPA2 and have been WiFi perfect for 24 hours!

Thanks again,


Dec 7, 2010 at 11:03 pm

Unfortunately, none of this has worked for me. I’m having trouble connecting to certain apps that require a network connection and also iTunes and the app store, plus some webpages but only on WiFi. The same apps, the App store and webpages work over 3G. I’ve tried changing the DNS as suggested and using Static instead of DHCP. I’m already using WPA. I’ve rebooted the phone after making such changes but still nothing. I know that I had to manually set my MTU on both of my computers so that I could view certain websites I was having trouble viewing before making the change to MTU 1400. Long shot but would that have anything to do with my connection problems on my iPhone 4 ? Any help would be appreciated. I really don’t want to have to change to 3G every time I want to connect to the App Store or certain apps like my Oz Weather app. Thanks – Cas.

Dec 8, 2010 at 10:32 am

I should make it clear that when I mention 3G in my post above, I’m not talking a 3G iPhone but the type of network I’m connected to with my phone carrier… Someone suggested to me it could be the firewall on my router so I tried turning that off but that didn’t fix the problem either. It’s more of an annoyance rather than a major problem but one I’d like to get fixed all the same. – Cas.

Dec 10, 2010 at 5:38 pm

Hi Cassie,

Sorry for the late reply. Instead of changing the MTU setting on your computers, have you tried changing the MTU settings on your Internet router/firewall? That may also fix the your iPhone wifi issue – or any other devices that connect to your wifi network.

MTU 1400 sounds a bit low.. Have you tried 1500 or 1492 (or whatever your ISP recommends)?

I assume you can connect to other wifi network from your iphone without problem?

Dec 12, 2010 at 9:50 am

Thanks. It appears as though your suggestion has worked for me, but not before I had a big shock for the amount of mobile data I was using. I’ve also found (although fiddly) that turning my mobile data setting off when I’m in the flat so it has to connect my wifi only.

Dec 15, 2010 at 5:16 pm

Thanks a bunch guys, worked on iphone 4. i love the
internet. Go World Wide Web !!!

Dec 15, 2010 at 5:18 pm

Hi Madbot Well that seems to have worked! I changed my
router setting to 1492 and the iPhone will now connect to WiFi on
the apps I was having trouble with. I’ve never tried connecting to
WiFi anywhere else except at home. Thanks so much for that. Much
appreciated. Cassie

Dec 18, 2010 at 7:43 am

My iPhone wi-fi connection is that bad that it doesn’t even
give time to delete the existing DNS setting and type in the new
one. It keeps resetting every 3 or 4 seconds. Driving me

Dec 22, 2010 at 9:44 am

How did I not find this page before today? Finally! Thanks
for pointing out a fix that I should’ve (but didn’t)

Dec 31, 2010 at 9:33 am

Madbot: thanks for the advice, though I guess my problem
was different. No amount of reboots, restores, etc worked to get my
phone to recognize the home network, but I finally got the
landowners to reboot their primary router. Once it was back online
that did the trick. I really have no idea what happened, but
somehow something happened on that router that caused it not to be
recognized only by my iPhone. All’s well that ends well!

Jan 2, 2011 at 5:52 am

hey… the problem with my 3g 8 gb is dat it does nt detect
my wifi most of the times i have 2 keep re booting it and if i have
luck then i can connect 2 my wifi for few minutes… pls i m reali
fed up of this fone need help thnx.

Jan 2, 2011 at 10:59 pm

Hi Gaurav,

Try changing some of the wifi settings on the wifi access point/router like channel and also try manually entering the details instead of letting the iPhone detect it.

Good luck!

Jan 2, 2011 at 11:12 pm

Hi Josh,

Glad to hear it worked out for you! Some access points require frequent restarts as they get older. One of my older PCI router (2year) got so bad that it required restarts almost daily. Bought a new NEC wifi router and the problem went away.

thanks for taking the effort to let us know your situation had a happy outcome. :-) happy new year!

Jan 4, 2011 at 11:39 am

I live out in a rural area with minimal neighbors. Going from WPA2 to WPA worked for me on my D-Link wireless router which was knocking our 2 iPhone 4’s and 2 iTouch’s off the wifi routinely driving us all nuts. Seems fine now. If you live in a more concentrated area it’s probably not a good choice security wise though.

Jan 4, 2011 at 8:10 pm

Dude from what a can tell it works so far ! I’ve been trying everything!! Thanks heaps mate,

Jan 9, 2011 at 9:00 am

I tried, this and it didn’t work. I have also tried other things from other forums (changing Beacon Period and RTS/Fragment Threshold) (unticking enable channel search)and none of them work for longer than two hours. I think they only work for a while as it involves rebooting the router.
So I am back to turning wifi off and on again,but I really can’t keep doing that, it is driving me nuts.

Got an ipad for Christmas and that does the same thing!

Jan 13, 2011 at 11:45 pm

Hi Ann, sorry for the late reply.

2 quick questions:

– is this problem happening to your iPhone/iPad only?

– does the same problem exist when you connect to other wifi network?


Jan 31, 2011 at 6:08 am

i have been rebooting link sys wrtp54g many times a day.all my friends have no trouble in my house.just me ,not even my wifes phone has any problem. loaded your fix .
thanx ,
we’ll see

Feb 1, 2011 at 6:44 am

My iPhone 3GS just drops the wifi signal without warning (everywhere, not just at home) and has been doing it for months. Sometimes I don’t notice right away and start racking up data charges, so I was thrilled to find this post!

I immediately put into the DNS field. I switched over to an app that always knocks me off wifi…and it happened again. So I read down the comments, went and switched my phone to Static IP and…same deal. Checked my router settings and made sure that I’m using WPA-TKIP and my MTU is set to auto (1500). No success.

I’m stymied, and completely frustrated (and a little jealous of all those for whom this worked!). Any other ideas?

come on...
Feb 4, 2011 at 3:59 pm

not saying it’s that much more likely to get hacked using WPA vs WPA2, but come on… Apple prides itself on design, having to compromise your security choice for a product to work us not acceptable. Where is the update fix apple?…

Feb 9, 2011 at 8:37 pm

Hi Melissa,

Sorry to hear you continue to have the problem. It sounds more like a hardware issue.

I notice my iPhone sometimes drops wifi when it’s not in use, but reconnects to wifi once I start using the phone. But your situation sound different.

Which app is continuously knocking you off wifi?

Mar 1, 2011 at 2:15 am

Hi Madbot,

Since I installed iOS 4.2.1 my wifi is messed up.
At home it still works fine, but at school it’s acting weird: I can connect to the school network, the wifi icon appears on top, but if I try Safari or any other app, it tells me I have no connection. I tried resetting the phone, the options and the DNS thing, but they all don’t work for me. Also, the information in the wifi options menu displays only the IP and the subnetmask.
Waiting for an iOS update will also not be necscary, because the iPhone 3G won’t be supported.

Mar 4, 2011 at 5:51 pm

Hi Jorian,

Does it work for your friends’ iphone or other wifi devices like laptops when you are at school? Some wifi will connect you but require you to be authenticated or logon. If you don’t authenticate, then while the wifi symbol is there, the wifi access point will not let your traffic get out. If the wifi connection works for your friends then authentication is not be an issue.

Make sure your wifi option menu displays the router value. You must have, at minimum, correct settings for IP address, subnet, router, and DNS for the network to work correctly.

Hope this helps :-)

Hope this helps.

Mar 7, 2011 at 4:33 am

Hi Madbot,

WiFi works totally fine at my friend’s ipod Touch 3rd gen.
It also used to work fine on my iPhone untill I updated to 4.2.1 (or just 4.2, can’t remember.)
Some of my other friends that also own an iPhone 3G haven’t updated yet, and it still works fine at their devices.

I guess it’s a bug in iOS, but I don’t know for sure. I’ve already tried everything and I am really confused. The only thing I haven’t tried yet is to downgrade the firmware, but I have been told that it is impossible to downgrade the baseband codes or whatsoever (I’m not really into this network terms).

I tried to type in the IP, subnet, router from what information there was on a friend’s iPod Touch and then I put in your DNS code. It doesn’t display the error message stating I have no internet, but all the apps requiring internet just keep loading into infinity.

Maybe you have another suggestion?

At least thanks for your reply.

Mar 7, 2011 at 5:23 pm

Hi Jorian,

You could try downgrading the firmware – baseband does not affect wifi connections. It’s for cell connection.

Try this. While you’re at school, in Wifi Settings, touch the side arrow to see details of the school WIFI profile.

1. Make sure “DHCP” is selected, check “HTTP Proxy” (at the bottom of the page) is turned to Off – unless your school use Http Proxy.
2. Click on Renew Lease

This makes your iPhone talk to the DHCP server to get a new IP “lease”. See if this helps.

If none of these works – you could try downgrading the firmware although I honestly don’t think that will fix it – then perhaps your school network admin has blocked your iPhone? It’s possible for the network admin to block your iphone based on your iPhone’s mac address (see yours in Settings / General / About / Wi-Fi Address). If your mac address is blocked, there’s not much you can do short of asking the admin (nicely) to unblock you, or look into jailbreak if there’s a tool that lets you spoof another mac address.

Good luck..!

Mar 13, 2011 at 10:35 pm

hi all,

just like share with you all. i hope everyone enjoy using wifi freely. i haven’t fully test more than a week but so far, i dun see this issue anymore. beside, the good thing here is you don’t have to always change the DNS.

if you have any comment pls do so. thanks.

solving internet drop out issue
1st. install ‘toggle insomnia’ program from cydia (free apps)
2nd. goto Iphone IOS4.2.1 directory: /var/preferences/SystemConfiguration/com.apple.wifi.plist

3rd. use ‘iFile’ program (from cydia) to open com.apple.wifi.plist in a .plist editor and look for this line of code as show below:



5th. DONE!!!!

Mar 20, 2011 at 10:41 pm

Thanks Vux!

Mar 31, 2011 at 9:19 am

This worked for my 3GS… Thanks!

May 1, 2011 at 9:53 pm

I took my I4 back to ATT and thee new one continued to have the same problem. Two sessions with AppleCare and a visit to the Genius Bar at the Apple store, numerous calls to Uverse,, ATT wireless and Apple was a waste of time. I entered the numbers you provided and my phone has been perfect since then.I cannot thank you enough.

May 5, 2011 at 11:50 pm

Thanks my iPhone is finialy of dial up like speeds yea !!!!!!!!

May 12, 2011 at 5:54 am

i using iphone 4 *(fw..4.2.1) … Im experiencing extreme slow speed wifi in my iphone.. I tried out everything using DNS, manually setting up my router and all. Nothing helped..but Today, I was talking to my friend using Skype on iphone 4, on same time i tried downloading app simultaneously on my phone4.. While using VOIP, the wifi speed goes to like extreme level.. Is this a bug or so??.. Can this be fixed.. The thing is i cant be in call mode everytime… So, I call skype test call to boost my wifi speed.. ANy solution..

May 12, 2011 at 8:03 am

Hi Aran,

That is an interesting situation. One way to help confirm your wifi speed difference is to download the free “Speedtest” app and run it before and after your Skype test call. You can also run the tests from your computer connected to the same wifi network by going to speedtest.net web site directly. I suggest running a few tests on the iPhone and computers before and after the test call.

Most modern routers have a QOS option, meaning Quality of Service. This is to assign a higher priority to certain traffic type like VOIP since it can be difficult to have a conversation with slow VOIP traffic. you can see how your router is currently configured and see if that helps.

Another method is to try using your ISP’s DNS instead of the Opendns servers. You can find your ISP DNS server IP address on your router’s connection status where it lists your router’s IP address, submit mask, and dns assigned by your ISP. Give it a shot.

Good luck! :-)

David Drobner
May 16, 2011 at 6:18 am

New Verizon iPhone 4g, identical issue with WiFi; the DNS change fix did not help. Verizon supposedly giving me a new (replacement) iPhone. Only “clue” that this may be software and not hardware failure: when the phone was brand new it worked fine on home WiFi netgear N router; streamed a 2 hour movie, never dropped WiFi. Then came an update from Verizon for the firmware I believe and then WiFi had all these issues to this day. I tried everything including total restore of phone – no difference. Really irritating issue.

Patrick in the Netherlands
May 21, 2011 at 3:49 pm

I have a new iPhone 4 that arrived less than a week ago. The WiFi dropout problem was driving me crazy. I was ready to take it to the shop today to have it replaced. Fortunately I found this link and made the change on the DNS as you advised. It is still working. I will make another post after 24 hours. I get amazing download speed on the WiFi of 20 MBs. Oddly enough, with my original iPhone 3G I never had this problem. It is still working on the old DNS setting.
Thank your for your instructions.

Jun 4, 2011 at 11:33 am

Just had to post to say that I was having the same issue and I tried what Guy and Peter Vroom suggested in the update (changing the WPA2 to WPA) and that has resolved my issue. Both of my iPhones were having that problem and after doing this, they’ve been working perfectly for five days now.


Dixon Jones
Jun 6, 2011 at 3:00 am

Thanks for this! I kept on flipping over to 3G to get reconnected. Obviously what I was doing was simply finding a DNS source! You can add multiple IPs in the dns field, separated with commas, so I added the 222.222 one you provided after my router defaults. This should be the best if both worlds, so touch wood!! Thankyou so much!

Jun 13, 2011 at 6:18 am

Hi all
I am at my wits end & at a loss for what to do next. My partner & I both have 3GS and have the wifi drop out problem – but only with our home wifi. Everywhere else, no drop outs. We have a Belkin F5D8235-4 N+ Wireless Router. The settings are as follows: broadcasting b,g& n; Bandwidth 20 MHz, SSID not broadcasting. We have downgraded security & authentication to WPA-PSK (no server), encryption is TKIP. We have added the open DNS addresses to the iPhone settings, switched to static IPs and turned the HTTP Proxy to ‘off’ from ‘auto’. Still we get the drop outs and need to toggle wifi on & off to get back online. Is there anything else we can try? Glad of any advice, and glad pleople are willing to help ! Thanks! :)

Jun 13, 2011 at 11:14 am

Hi Bec,

One suggestion – after a wifi router power reset (just turn it off and back on), do your iphones wifi connection last a bit longer before the drop out come back?

A couple of my older routers were perfect at the beginning – but after some 3 or 4 years started having the drop out problems. It’d be fine after a restart but the problem would return after a while. I got into a habit of restarting them but eventually gave in and bought a new one.

I hear it’s something to do with the materials used in the electronics and the circuit board fading due to time. It is more common in the lower priced home products than the higher priced industrial types.

If the problem is only with your home wifi router and not others, try to restart and see if it temporarily solves the problem and how long until the problem returns.

Good luck :-)

Jun 15, 2011 at 7:04 am

To answer your question, it made no difference if the router was reset – and other non apple devices stayed online with no problem. However – good news for us!! There was a router firmware upgrade and guess what – no drop outs since!! Whether it was the upgrade, the changes we made to our DNS settings or a combination of both I’m not sure, but I’m just really happy and also glad to have found this site! Thanks for all the help & advice everyone! 😀

Jun 15, 2011 at 9:00 am

Hi Bec,

That’s great news. Congrats! :-)

Jun 30, 2011 at 9:04 pm

what the number set server/dns/proxy and ip/port

Jun 30, 2011 at 11:12 pm

Hi Shantozol,

First set to DHCP, note the settings then set the DNS to the IP address mentioned in the post.

Good luck!

Jul 1, 2011 at 9:22 pm

what is DHCP?

Jul 3, 2011 at 10:32 pm

Hi Snantozol – DHCP is one of the options to choose when setting up wireless on your iPhone.

Jul 11, 2011 at 12:40 am

A friend gave me her old 2G to use as an iPod. I used it with my home Wifi for about a day and a half, now, it will not even find my home Wifi (or any other, for that matter) for me to change DNS settings. I have not changed any setting on my Netgear wireless router and it is only about 6 months old. Any suggestions?

Jul 11, 2011 at 1:32 am

Hi MissRiss,

Have you tried restarting by holding down the power button and the home button together – and keep holding (ignore the swipe to restart) until the screen gies black? Then release the home button and the iPhone should do a restart.

If that makes no change, try doing a restore (back up data first) or upgrade to the last firmware for iPhone 2G. iTunes will tell you that.

Good luck!

Jul 22, 2011 at 11:38 pm

Worked…thanks this has been a pain in my ass since I got my new phone

Aug 17, 2011 at 6:02 am

The WPA-2 to WPA method worked for me. I really didn’t feel like changing all 12 I-devices (Iphones,ipads,and itouches) so i tried this method first and it worked like a charm on all of them. I used to experience wifi drops every 10 minutes. Thanks

Aug 19, 2011 at 3:35 am

Recently purchased an unlocked iPhone 3G 8GB for use overseas in a few weeks. Phone is great except for this dropout issue. Wifi connection shows connected but apps are losing their connection and browsing through the app store is hell. At first I thought it was the phones hardware itself, but I just came back from Starbucks where I sat for an hour without one single drop. So it has to be a settings issue. I’ve changed the DNS as suggested but no luck. My router at home is not secure (I filter the MAC addresses instead) so changing from WPA2 to WPA is not an option for me. I’ve tried the reset the phone (holding down power+home) and this did not help. My home router works great for the several wirelessly connected laptops we have at home, as well two other cell phones (Blackberry Curve & HTC Evo Shift), so the issue has to be with the iPhone.

Any ideas?

Aug 19, 2011 at 8:18 am

Hi Florian,

Is the iPhone firmware up to date (up to what iTunes will give it anyway) and have you heckled if your router firmware is also up to date?

Aug 19, 2011 at 9:47 am

Version: 4.2.1
Firmware: 06.15.00

cant update because it will remove the unlock on the phone meaning i wont be able to use it overseas in a few weeks.

router should be fine because all my other devices work on it. im going to test the iphone on a few more public networks and will report back with results.

Aug 19, 2011 at 12:16 pm

Hi Florian,

The iPhone firmware should be fine then. The suggestion on router firmware was because one previous comment that they had a situation where all other wifi devices worked fine with the router – except the iPhone. A quick router firmware upgrade solved it for the iPhone.

Good luck. :-)

Aug 20, 2011 at 1:47 am

Just checked 5 more public networks and they all worked without a problem. I copied down some of the DNS information:

IP: (not that this matters)
Subnet Mask:
DNS: (i found it interesting that the router and dns were the same address)

Subnet Mask:
DNS:,, (router+dns are the same on one again hmmm)

My Cities free Wifi:
Subnet Mask:

There was a kids version of the cities wifi as well and that had basically the same settings just the IP it snatched was different. Forgot to write down the settings at the Apple Store.

My home router settings are as follows:
Subnet Mask:
DNS: Two IP addresses from my ISP. When the router is on without the modem plugged in the DNS, Default Gateway, Subnet Masks slots are empty of course. Only when the modem is attached does it fetch these settings.

I also see that the Subnet Mask for the router ( and for the local network ( are different. Don’t think thats really an issue, I think its more the DNS settings.

I have added my routers IP address to my DNS settings (like Starbucks + McDonalds have) in addition to the already listed DNS IPs and its still dropping out. When I remove my ISP’s DNS IPs and only leave the router IP I get no connection at all.

Any other ideas based off this additional research?

Aug 20, 2011 at 4:33 pm

Hi Florian,

Any IP address that starts with 192.168 are private addresses, meaning they are not available on the public Internet. So any address starting with 192.168 at Starbucks can only be accessed from within that Starbucks network.

It is common in a small private network (like Starbucks) to have the router also handle DNS. Most routers default to this config and there is usually no problem.

Regarding your home router settings:
– If you are running a normal home network, I suggest your subnet mask be
– Your router automatically obtains its IP and DNS from the ISP. This is why only when the modem is attached, the settings are fetched. This is good and normal.

You mentioned you use mac address filtering and not encryption like WPA. May be an idea to test setup a WPA security (actually simpler than using mac address) and see if you still drop connection on the iPhone. If it works, it is very easy to add the WPA key onto your other devices (just type in the password when prompted the first time).

Failing that, as the iPhone wifi works fine elsewhere, it looks like the issue may be with your router. I would look up the manufacturer web site and see if they have a firmware upgrade for you to download and install. This is usually also a simple process.

Good luck. :-)

Aug 22, 2011 at 11:46 pm

HEY I SOLVED THIS PROBLEM….. WITH SIMPLE THING… i tired to do lost of things but lastly i got this… i was change my iphone wifi network settings DHCP to BootP….. & change DNS Ip to THATS ALLLLL…………… thanks for all

Nov 9, 2011 at 7:37 am

Why that specific dns number dont know mch about it but i dont want any security risks

Nov 11, 2011 at 4:26 pm

Hi Sunny,

No particular reason except that it seems to work – maybe due to compatibility vs the DNS server on the router. The DNS servers are run by OpenDNS – a reputable DNS service provider that also provide anti-phishing services.

Hope this helps :)

Jan 3, 2012 at 9:45 pm

did not work !

Jan 4, 2012 at 12:43 pm

Hi VJ,

Sorry to hear you are not having much success. Let us know what you have tried and we may be able to assist.

Good luck! :-)

Gary Lee
Apr 15, 2012 at 8:36 pm

Thank you so much. I got my 4GS 2 weeks ago and it was dropping on & off unlike my previous 3GS. After I entered the DNS like you mentioned, it has been pretty well behaved the last 2 days. Thank you so much…

Apr 19, 2012 at 9:00 pm

Had the same issue as others above: Stable Wifi-connection but loss of internet connection after two minutes. needed to reconnect every 2 minutes in order to use wifi internet… I have two iPhones 4. one has always worked flawlessly. I had this issue only with one device.

after changing automatic dhcp to static, typing in as dns and filling in the other usual parameters it seemed to work. strangely it started to work only one day after I made the changes. probably a reboot after the dns-change would have done the trick. let’s hope it’s a permanent fix.

thanks. cheers

Apr 21, 2012 at 6:17 am

Hey.. Thanks! This helped my iPhone which constantly kept dropping the wifi.. But the same thing has been happening with my brothers Android so would this possibly work?

Apr 21, 2012 at 12:07 pm

Hi Glenda,

It will not hurt to try it on the Android, and you can always change the settings back.

Give it a go :-)

Sep 10, 2012 at 11:47 pm

hey change my dns server on My Iphone 4s 16gb let see, problem its disconnect after 15 minutes when Iphone is near to router not when far way it worked properly when far away but when near it disconnect having this problem for 7 month when i bought my Iphone hope this is the end.. let yu know whether it work or not. thanks for helps

Nov 14, 2012 at 2:20 pm

That sounds like you need a new router..! :-)

Feb 17, 2013 at 7:41 pm

I know this post is old, but I just wanted to mention a great DNS. Google has a very fast and stable DNS network that works better than any ISP DNS I’ve used in the past. It’s similar to OpenDNS, but with Google’s widespread reach, theirs is much more advanced. The IPs are, and just put it in your DNS network setting just like that. I use those IPs on my computer’s adapter setting, both my iPhones, and my router. A bit overkill, yea, but just wanted to make sure no default DNSs get used.

If you are unsure about those IPs, just search Google for them to verify.



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