iPhone 4 - painfully slow wi-fi performance

I was having the same wifi problems everyone was reporting here. I got a replacement iphone today and all my wifi problems are gone. If anyone is having these wifi issues I suggest you get your phone replaced

Hi, macatron,

Are you able to confirm where i need to change this DNS setting? Is it on my router itself ?

I am in the UK and currently have sky broadband via a netgear router.

I have found the primary DNS for sky, so am just wondering where i need to update this 🙂

Thanks in advance !

To get it to work, all I did was ad my provider's primary DNS address in place of my own router's addresses (directly on my iPhone). Just pull up your wireless network from the settings on your phone, and then paste your provider's primary DNS address where your router's addresses already are. This allows for the iPhone to simply talk directly to the provider, and greatly speeds transfer speeds up. Let me know if that explains it better for you. If not, I'll give it another shot. 🙂

Using the Comcast DNS worked for me!! Thanks so much! The slow and inconsistent wifi was driving me nuts!

I was told by Apple to use a static IP address or to renew my IP address if using DHCP.

Neither have cleared this up for me.

I am having the same issue.

Using the built-in youtube player it's painfully slow when watching any video clip that has HD available. If I use the built-in youtube player to watch a video clip that doesn't have HD then it works fine.

It seems the original youtube player automatically downloads the HD version and don't let you change the quality.

At first I thought it's my DSL since it was only 1.5MBPS and I was able to reproduce this slowness on my computer when watching the same video I watched on my iphone with HD. On the computer at least you have the option to select which quality you want to watch so if the HD is too slow for you then you can select the standard definition video. On the iphone youtube player you can't choose the quality.

After upgrading my DSL line to a cable with 8Mbps, I am still seeing the same slowness issue on my iphone with the built-in youtube player.

I verified on my computer which uses the same wifi and watch a HD video and now I don't have any slowness anymore.

Another reason I think this is the original youtube player's problem is because when I used safari and go to m.youtube.com, I was able to watch the same HD video without any slowness. Another benefit of using m.youtube.com through safari is that you can now choose either the SD or the HD quality so if your internet line is not as fast, you can choose to download the SD quality video.

Using the safari browser with m.youtube.com is only a temporary solution since many times when you click on a link it uses the default youtube player and that slows things down.

I hope this get fixed soon.

Regarding setting the DNS, I checked my network setting on my iphone it's already pointed to the charter's DNS directly and not to my router.

hi, I wonder could you help.

My ISP DNS is 62.24.243.1.

Where do I add this?

I try to edit my wifi connection . under dhcp but i can't edit the Router ..... IP as you suggest. Only the dns IP I can edit.

All you need to do is go to settings on your iPhone, and then to Wi-Fi, and then touch the little arrow (>) that's directly to the right of your Wi-Fi connection. That will then bring you to the screen where you'll delete your DNS address (from the DNS box), and then put your ISP's DNS address into the DNS box. After you do this, it will probably make the rest of your settings (IP Address, Subnet Mask, ect) go blank. Do worry about that because they will automattically come back the after you back all the way out of settings and go back into them. So, just back out of the settings, and your Wi-Fi connection should now be a WHOLE lot better!! 🙂 Let me know if you get it up and running ok.

another thing is wifi keeps droppping when i lock and unlock . and it is not always ! it just happens some times, and also in network settings it shows it is connected .. the only way to fix it .. reconnect to wifi. 😟 It has happened 3 times in the past 24 hours ... I was at the same location , didnt go out of wifi and come back , just locked for 2-3 mins and then unlock.

Changing the IP setting from that of my router to Google DNS (8.8.8.8) has helped my wifi reception no end...

only way for me to get wifi to work properly is to use mode b on a b/g router, mixed mode or only g does not work...

I recently used this thread to try to troubleshoot my own slow wifi problem on iPhone 4, after receiving it four days ago.

My router is the Netgear DG834GT (not a wireless N router) that many people seem to be having this problem with. I don't have any other devices that have a problem with this router or my wireless network (except the iPad but that problem was acknowledged by Apple and solved in the latest iPad software update).

Tried everything listed on this thread as well as other things: Tried to forget and re-add the wifi on the iPhone 4, "Reset Network Settings", turned wifi on and off, tried using static IP, added DNS, took away DNS, restored the phone to factory settings. Nothing worked.

So I tried a few things with the router itself. Restarted, changed the channel, changed from auto to g-only, to g/b, etc... Again, nothing.

So I tried setting up Internet sharing on my iMac, and connected the iPhone 4 to the iMac through Airport instead... Lo and behold, fast wifi on the iPhone 4. This eliminated any potential hardware problem and pretty much confirmed an incompatibility with the router and the iPhone 4's iOS4 wifi drivers.

EVENTUALLY I realised the router firmware wasn't the latest one, so updated that to v1.03.23. BOOM. Fast wifi on iPhone 4.

What I find interesting though is the amount of people with this router that HAVE installed the latest firmware and STILL have the problem.

Now, this thread is pretty old, and I'm curious to hear how many of you STILL have this problem, or whether you've found a fix. Also, which other routers also contribute to this problem? I've noticed many people with Linksys routers. What models are they? Do they all have the latest firmware? It'd be helpful to others to pool info here, because the iPhone has JUST come out in Australia and many other countries, and I gather that more people will be experiencing this problem all over again.

mine is also a netgear, model WGR614 though, another fella in this post has the same as me: http://discussions.info.apple.com/message.jspa?messageID=12028028#12028028

fuego24. If that is the case for you then you are simply lucky. I am not on my THIRD iphone 4. The first two went back for separate problems, yet all three have had the horrendous wi fi speed compared to my 3G. So it definitely isnt a case of just getting a new unit.

reemixxed

What firmware version did you go from and to? I am confused. I look at my settings (same router as you on sky) and my firmware version is V1.03.87.

However when you go on to netgears site and look up the router, it says the latest firmware version is 1.03.23? Surely theres something wrong there? If I have version 87, thats later than 23?