iPhone 5 wifi issues

I have the same problem with my Iphone 5. Sometimes Iphone can't connect to my wifi (I have d-link dir 635 router), sometimes connect but speed is about 0,5 - 3 Mb/s. I have two Iphones 4 and 4s and speed is about 20-30 Mb/s. It is my second router and I checked 2 routers from my friend. Still the same problem. I checked 4 routers.

Screenshot from my Iphone 5 in my home:

But!!! in my work my Iphone 5 connect to WiFi without any problems and works great. Speed 40Mb/s wow.

Screenshot below (in my work)

Below the history of test:

13,25 Mb/s a it is Orange 3G speed;

Other results from my home wifi.

I don't understand where the problem is.

I just solved the issue at least at my house, where I can get by without dynamic assignment. You have to set your iOS device to connect using 'Static' IP assignment.

Keys appear to be as follows:

1. Inside your network, your router uses a range of DHCP addresses, mine was between 2 and 49 on the end of the IP range. Most home routers this is 192.168.1.2 through 192.168.1.49. The router is 192.168.1.1, (Usually. If you changed this all this is just example)

2. You manually connect by selecting the arrow left in the iOS screen, not the center of the network button which will try to connect you.

3. Change to 'Static', then enter in the information like I did with the attached image. (Again, your actual IP address may be different)

When I did this I was able to add my iPhone 5 and my iPhone 4 both with iOS 6.0.1, where before they would both fail to connect reliably. This is clearly an Apple bug with iOS 6 and possibly also the iPhone 5.

I'm also seeing shocking WIFI performance with my iPhone5. I have a TimeCapsule, with 2.4 & 5GHz, about 9 devices connect without trouble or throughput issues.

I thought my iPhone5 was one of these no problem devices, until I noticed my podcast downloads in Downcast were very very slow (30 minutes to download a 50Mb VergeCast or any similar podcast). Went to my iPad3, tried the same download no problem. Ran speedtest on my iPhone5 and it shows performance off the chart (29Mbps down and 2.4Mbps up, I'm on a 120Mbps/2.4Mbps DOCS 3 Cable service).

I then turned off WIFI and tried the same download (and a few more), magically 48 seconds to complete download, over HSDPA/3G (not even HSDPA+ or LTE).

Im can replicate this situation time and time again, where my iPad3 is ok on the same network, my iPhone on cellular is fine, however when I connect it to my WIFI network boom.......it is useless.

This was with 6.0.2, so not sure if this problem started with this update or before with 6.0.1. Just for giggles I uploaded a certain beta4 version, same issue I'm afraid.

At this point I'd automatically start thinking hardware, however given speedtest.net results this would seem to be an incorrect direction.

WIFI Test - slow performance

3G Test - far better

Speedtest over WIFI

What I have noticed during my last days, is following - and maybe you can check it, too:

In WiFi settings the live signal strength will be displayed as you know or can see below. In live preview the appropriate WiFi network seems to be recept with 3 bars. But the iPhone 5 itself is connected with weak 1 bar only. And that is exactly how that network behaves then - connection is lost and weak data transfer speeds.

I don't know why that is happening (btw: I updated to 6.0.2 straight away when that "fix" came out), but it seems to be causal determined somehow.

Regards,

Marc

Something else I noticed:

Being connected to the same network, "iPhone Generations" demonstrate pretty impressively that the 5 has definitley a problem.

So I went yesterday to the Apple Store nearby Stuttgart, Germany and instead of a new device, the technician simply deleted my personal data and re-branded the OS with a version from the technician's Macbook (might be different from what people are able to download through iTunes at home?!). He claimed to re-install 6.0.2 as in "some cases" this update could have destroyed (he said confused) some relevant data of the OS. I asked how an update that was supposed to fix WiFi trouble in the first place could destroy the file system or confuse some system files of an iPhone 5. He replied: Sorry, but this can happen.

When I came home, I have set up my old phone from my backup.

Since yesterday I didn't have any WiFi problem (apart from a small issue in the coffee place around the corner, but that is because of them 😉). For a short while I had no data connection while being hooked up to 3G, but this was only 5 mins.

Problem solved? I let you know during the next days of testing and monitoring.

Cheers friends,

Marc

I took my iPhone 5 in about a week ago to the Apple store, I had wifi issues, and battery issues. Even though the phone connected in the store and worked great, they replaced it without questioning me. I have had my new iPhone5 (iOS 6.0.2) for a week now and it has been working as it should. I get full 20Mbps at home, which is all I pay for. The battery life is better, but still not great. It is about equal to my 1.5yr old iPhone4. Maybe thats just because of 4G or bigger screen, I don't know. The "genius" at the store said he never heard of this issue before, which was a bold face lie, since I could clearly hear other people in the store talking about the same issues with other geniuses. (I hate that they're called geniuses)

I as well have unfortunately experienced WIFI connectivity similar to many in this forum. Another member in my family, however has an iPhone 5 which works PERFECTLY when connected to the same unsecured WIFI network. This makes me believe this is infact an iPhone 5 hardware based issue. I wanted to share this & have included a link to a brief video below that clearly shows this.

After unsucessfully attempting to fix the defective iPhone 5 by resetting the network settings & updating the software to iOS 6.1, I proceeded to the "Genius Bar" at my local Apple store. The defective iPhone suprisingly worked just fine when connected to the Apple store WIFI. An exchange for a replacement iPhone could not be made because the iPhone appeared to be working fine with "no defect". The Wifi connectivity issues persisted when arriving home as well as other public wifi hotspots. So I decided to make the video below to show the folks at Apple what is really going on. Hope it helps others who run into a similar issue:

A WORKING iPhone 5 side by side with a DEFECTIVE iPhone 5 VIDEO:

http://www.youtube.com/watch?v=UYYRrXNNisE&feature=youtu.be

VIDEO DESCRIPTION:

A defective iPhone 5 (Model: MD638LL/A), seen on the right side of the screen, looses connectivity to a wireless router after moving back just 40ft. The defective phone does however stays connected to a WIFI network if it is 15 feet or less from the router. A working iPhone 5, seen on the left, is shown as a comparison, & successfully connects despite the 40ft distance from the router.

After unsuccessfully attempting to fix the defective iPhone 5 by "reseting network setting" & updating the software to iOS 6.1, I proceeded to the "Genius Bar" at my local Apple store. The defective phone surprisingly worked just fine when connecting to the apple store WIFI. An exchange for a new phone could not be given due to the fact that the iPhone 5 appeared to be working fine. The WIFI connectivity issue persisted when arriving home. The same connectivity issues occur on public WIFI networks, other than at the apple store.

The working iPhone was purchased from an AT&T store during the iPhone 5 release. The defective iPhone was purchased from the same AT&T store in December 2012 (Model: MD638LL/A), (Modem Firmware: 3.04.25)

Oh my GOD, early days, however it appears (and I've only tested with four podcasts) that my issue of slow application throughput performance in Podcast & Dropbox is fxied with the Airport 7.6.3 update IS FIXED!

Not sure what has been fixed, however sadly if I'm using my other non Apple access point I'll still have issues I guess, but hey 80% of the time I'm connected to my home Timecapsule.

4 meters from my router...@wdegi

did you have normal wifi before update?? no isssues and normal connecting on network from large distance?

If you have and after update havent anymore, it seems to be very very bad combination or relation HARDWARE-SOFTWARE.. Im gonna send my to apple store and well see am i lucky or not....😕

Right.

I've owned every single iPhone since they came out minus the 4s, and have been buying macs since before you were born. I won't be buying the next iPhone that's for sure. In fact, I find Apple's line boring and overpriced now.

So let me help you. Same distance. Same network. Same troll running the tests:

MacBook:

Same ****** wifi.

So a bit more information, decided to so some network sniffing, on the next hop device up from my iPhone. As far as I can make out the issue I'm facing is massive amounts of TCP Retranmissions, resulting in a ever shrinking TCP Window (down to 136 bytes, I think normal window size is 16384).

I've completed this testing with iPhone 5, iPhone 4.0, iPad 2 and iPad 3.....only the iPhone 5 shows this issue (I also tested with both iCatcher and Downcast, with multiple podcast sources).

So something appears broken in the iPhone 5 network stack, something that is causing TCP Retransmissions that are well excess of normal, this results in a decrease in the TCP window size, causing slow downloads.

Anyone else agree with my largely un-informed explination above...........

Here is a screen shot of the network capture, 205.234.175.175 is the podcast source, twit cachefly cache server & 192.168.252.64 is my iPhone 5.

redshiftbr wrote:

My iPhone 5, when connected to my personal wpa2 secured wi fi network, works normally for web navigation but has a very bad performance when connecting and downloading apps from Apple Store.

The Apple Store has been a bit slow as of late on iOS and OS X; I suspect they need more bandwidth on the server end.

As far as Wi-Fi, I know it doesn't help anyone, but for my iPhone 5:

I'm also having the slow downloads of podcasts, and apps from the appstore. Here is an screenshot I took while trying to figure out what exactly the problem is:

In case the resolution isn't great enough to read the data, you can also view the full resolution image here: https://www.dropbox.com/s/s1oaowc5m6ae61e/image%20notated.png

ALL devices were sitting on the same table when these measurements were taken. One thing I found peculiar is that when the problem occured, the RS rate of the iPhone5 would plummet while the TX rate would stay quite a bit higher. As you can see in this image, it's all the way down to 1M! Using the phone on LTE is blazing fast and has NONE of the same problems as when using WIFI.

Another thing to note is that the wifi reception on ALL iPhone 5's seems to be FAR WEAKER than previous generation iOS devices! Even my brother in law, who is NOT a techie, upgraded to an iPhone5 and is VERY unhappy that he cannot watch netflix in his gym at work because wifi reception is too weak. His previous iPhone 4 worked just fine in the same exact location.

The REALLY BAD news is that Apple is either incompetent or doesn't seem to be taking this problem seriously. I have had a trouble ticket open with them for this issue since OCTOBER 2012!!!

I have this issue as well with my iPhone 5. I've figured out that my WiFi data drops on WPA/WPA2 encrypted networks. It works great on open networks though. I found this thread earlier relating to this issue:

https://discussions.apple.com/thread/4325654?answerId=19681772022#19681772022

I restored my iPhone 5 with the following ipsw:

http://appldnld.apple.com/iOS6/Restore/041-7171.20120919.doJ1e/iPhone5,2_6.0_10A 405_Restore.ipsw

That's the latest released build of iOS 6 for the iPhone 5 (CDMA) that I've found. I'm experiencing the exact same issues you are (no data on WPA/WPA2 protected WiFi networks). Unfortunately, the issue still exists. It's starting to look like a hardware issue. That is unless they are using multiple vendors of WiFi cards for the iPhone 5. That's the only thing that could explain why some iPhone 5s work on protected WiFi and some don't.