iPhone 4 cannot connect to home Wi-Fi

Nothing regarding security should have been included in 4.3.3, but if you have a router that was released prior to the final 802.11n specification then a call included within the update that is in compliance may not work with your router. It would not hurt to see if a firmware update is available for yours.

Just for the record....Same/Similar problem here! Since upgrading my iphone 4 to OS 4.3.3, my wifi doesn't connect properly to my home network (which is airport extreme version 7.5.2, and I have an airport express repeater to insure my signal strength ). My phone connected everywhere easily without issue before this upgrade. All of my other devices work just fine (MacBook Pro, Mac Pro, and several PC's). Unless I'm right next to my wifi device, I can't connect. Sometimes it asks me for my password repeatedly, and doesn't connect at all. Sometimes I get other neighborhood networks, and not my own (mine has more bars of course), and sometimes it automatically goes to 3G. I sent feedback to Apple and am waiting for a phone call from support. I tried all of the offered solutions here.

This is very annoying, especially since I didn't have this problem before this upgrade.

You mean dialing it back to version 7.5.1? No, I didn't, mainly because I understand it's not a consistant fix. I was hoping they will issue an update or patch to the problem and I didn't want to change my firmware since it's working beautifully on all my devices except my iphone.

I got a call from Apple tech support a few minutes ago... I think they know about the problem. He said to check back in a few days to see if there's a patch (800 692-7553). He explained when Apple issues a patch it may not be a formal update through iTunes, but simply a patch, and a system restore on the phone would pick it up. I don't want to bother restoring the phone until there's a patch, so I'll wait a few days and call. My phone connects to my wifi, I just need to be in the same room. A bit of a pain, and I wish Apple would formally fess up to this problem, but I'd rather not screw around with my devices/software/etc. when I know what's causing the problem.

To joshjones01:

I agree with you. The problem is located on the iphone using 4.3.3 and not on the people networking equipments.

What I was willing to point out is that there are two equipments facing each other: The first one is the iphone and let's call the second one a router.

Since you have a limited access to the iphone network settings, people are trying to modify the network using the other side of the network, that is the router.

And they are sometimes lucky...

I was lucky, since I was able to discard 802.11n on the router side and since this is a kind of a temporary fix... I will just wait for 4.3.4, and enable 802.11n back on the router.

(I'm not using the airport express as the router, but a triple play "box")

Uploading firmware version 7.5.1 (from 7.5.2) to my Time Capsule using the AirPort Utility software allows me to connect my iOS devices to the network again. Something must be out of sync with iOS 4.3.3 and version 7.5.1 on the TC.

It could be me, but with others having the same problem, I sort of doubt it.

Report logged with Apple Care.

If you are using Apple devices for routing give this a go, it is a quick experiment and may provide you with some relief for now.

Kind Regards

Hi. I am having the same problem with the iphone wifi. I just upgraded my iphone4 to the latest iOS 4.3.3 and found out that my iphone4 cannot detect any wifi networks nearby. I don't know whether this is caused by the latest iOS or it is a hardware problem. Hope you guys can help me out. Thanks

I completely agree! This is not about networking equipment when your iOS devise works one day and then suddenly doesn't the next. It's not like the networking equipment "gremlins" come out at night and change the settings so that everything except iOS devices quit working. I have a Macbook that is working fine, a windows PC that is working fine. The only devise that suddenly can't connect to my home WiFi is my iPhone 4.

However, unlike most of you who have posted, I HAVEN'T upgraded it to 4.3.3. I had no problems before this morning. I've recycled all of my network devices as well as reset the network settings on my iPhone and it continues to respond, "Unable to join the network..." Absolutely NOTHING has changed in any of my configs since yesterday, with the exception of my resetting the network settings on my Phone.

Ideas???

My iPhone 4 on 4 3 3 was not connecting to my

Home network after trying everything.

But then my phone started turning itself

Off. So after getting getting it replaced

Today I checked the version and it's

4 3 1 and it connected straight away, no problems

At all

Hi Guys, I’m facing exactly thesame problem that everyone is but only difference is that I dint upgrade my iOSyet, but still I’m facing this problem. However all other devices includinganother iphone that I have is connecting to my home wifi and working perfectlyfine... I'm absolutely clueless what has caused this problem and how do we fixit....

Hi guys I just found a fix for this issue in my case and thought of sharing it here.

If you guys have updated your iOS to 4.3.3 then there is a new feature in the settings app to reset the network settings. For those who dont know how to get there, plese follow these steps:

1. Go to the settings app in your iPhone.

2. Choose the 'General' option

3. Choose the 'Reset' option at bottom of the list.

4. Tap on the 'Reset Network Settings'.

5. Your iPhone will restart and then try to reconnect to your home wifi & hopefully it should work fine!

Hope this can helped... Let me know...

May be you are right... I might not have seen this feature earlier... However i tried it when I faced this problem and it worked for me and my iPhone is working perfectly fine now... So may be it can help others facing same problem as well...

blue marker wrote:

Hi William, what AP/Router are you using - make, model and firmware version Also, on your network setup, - Is a MAC filter used, and do you know if WMM is Enabled?

Thanks but this misses the point. Apple should make their kit work like 100% of others around us today. We do NOT serve Apple, they serve us. They broke it and they are too greedy and arrogant to even admit it.

My advice again: Go be noisy in an Apple store - GUARANTEED they will hop to it!

I had this problem that started around the 4.3.2 update, I would often lose my home WIFI for no reason and would manually have to rejoin reinserting the passcode several times until it joined the network.

Funnily enough I did reset the network settings after the 4.3.3 in the vain hope of curing the battery drain and I've not had the WIFI issue recently.

Another example here

Iphone 4 running 4.2.1 works on Wifi in my apartment no problem, at the same time, iPad (now running 4.3.3) cannot connect regardless of resets, reinstalls, etc...

Before I did this, I had the original iOs from when iPad 1 shipped and it was the most reliable wireless connection I had in the house

No hardware changes, no additions to the network, only change was made was the update to 4.3.3

4.3.3 has problems. Cannot wait for 4.3.4

Tried the DFU mode + back-up&restore.

Got confused since it's beyond my usual skills, but at the end, I had everything back on my iphone.

Enabled 802.11n back on my router.

And now I'm back to a normal stable&fast wifi access at home!

Is there a possibility that 4.3.3 did not install itself properly the first time, and that a second installation corrected it?