No Wifi after iPhone 3.1 upgrade

It works!!!

I went to the Apple Store today and the guy fixed my wifi issue in a about 5 minutes. Here is how he fixed it: 1 - Turn on air plane mode. 2 - reset network settings. 3 - turn air plane mode off. 4 - connect to wifi.

This sounds strange but he told me that turning on airplane mode is really the only way you can totally reset all of the network settigs. If you do not turn air plane mode on some settings will not be reset because they are in use.

I hope this helps everyone else out who is having this problem.

Doesn't seem to work for me.

I guess the chip is fried or something... **** Apple, until 3.1 it was perfect.

God I miss my wifi enabled iphone 😟

i'll just briefly chime in here and say that i am having the same problem as many many many other people in this thread. since upgrading to 3.1.2 my iphone 3G can no longer find any wireless networks. i just tried the airplane mode > reset network settings thing, and that did not work for me. i hope this gets resolved soon.

Sounds like a different issue. In my case my phone could see the networks but was unable to connect to them no matter what I did. Not seeing the networks at all sounds even worse! Sorry this fix did not work for you.

Unfortunately, that fix does not work for me. I can always see my D-Link, but it takes an average of 8 tries to connect. No change after following your procedure. Thanks anyway.

Since the iPhone can connect first-time, every time with my AirPort Express and Extreme, my iPhone just needs a software update.

It appears from all the reports here that the iPhone is suffering from at least three types of wi-fi problems. That's a poor track record for one device.

same thing for me, it doesn't work 😟

Thanks anyway

Well my Wifi was working great for a while and now it's back to not working. I tried the fix again and it did not work this time. Bummer - looks like it's back to the apple store tomorrow.

There are four words in common use that you might find helpful.... 'fit for the purpose'

I've had this problem myself, i've managed to fix it for now, but the connection is still not as strong as it was before the last update.

Here's what i've done:

Reset phone, erased all data and setup as a new phone with itunes.

This alone didnt fix the problem, i've also removed the wireless network key on ther router. For whatever reason, the phone will not connect to the wireless when it requires a key. I've checked, and double checked that im typing the key right but it just wont work.

Like I say, the connection still isnt as good as it was before (while i've been typing this it's disconnected and reconnected twice by itself), but it works to a degree, and is better than nothing.

Removing your wireless key obviously isn't ideal, so if you do remove it, i suggest your turn on the mac address control to restrict who can connect to it.

I hope this works for others.

Weak weak iPhone Wi-Fi signal.

It works only if I'm very very close to router (max 2mt).
I tried to restore system 3 times with itunes, to change router, to unlock network, to assign a static IP, nothing improved the signal quality. It's unusable.
I have 4 laptops at home, iPhone it's the only device unable to connect to the wireless network.

I repeat, it's shame that a device built for connectivity has this kind of trouble.
Regrettable!

I went back to the Apple Store today and they ended up replacing my phone after several different attemps to fix it including opening it up. The new phone had no problem connecting to the wifi in the store and is working great here at home.

Check that the Router Firmware is up to date. Also check the Router Manufacturer Webpage for known iPhone WiFi issues.

Followers of this thread should take note of this solution....

For those who have been able to fix this issue of broken Wi-Fi connectivity: congratulations. However, the problem is apparently a lot bigger than just this thread.

http://discussions.apple.com/thread.jspa?threadID=2158541
http://discussions.apple.com/thread.jspa?threadID=2123068
http://discussions.apple.com/thread.jspa?threadID=2044754
http://discussions.apple.com/thread.jspa?threadID=2204441
http://discussions.apple.com/thread.jspa?threadID=2214691
http://discussions.apple.com/thread.jspa?threadID=2151145
...and probably many more (lots of small posts).

And then there's all the Web chatter. A small example: http://is.gd/4OUtj

At the same time, why does this seem to be under reported? Questionable battery life received far more coverage.

My latest: I went to an Apple Store last night. The GB was busy, so I stood in the middle of the store and watched my Wi-Fi connection. Connect, disconnect, connect, disconnect... over and over, at various rates. I just watched. It just didn't work. I reset connections, restarted, etc., and it just kept doing the same thing.

I'm convinced we'll find out that there is some batch of iPhones with a chipset susceptible to wi-fi-fry.

Now to make an appointment with the Genius Bar (gag) and see if Apple will just give me a new phone without argument.

- PJI

The very pleasant experience at the Genius Bar (Apple Store, West Hartford, CT) resulted in a new replacement phone. I know all the homework helped. When I scheduled the GB appointment, I included my last post here (slightly edited, with all the links). I knew what I was talking about.

I went in with the Wi-Fi network settings screen on to show the constant find / lose of the Apple "Store" and "Demo" networks. He then did a network reset and said, "There. It's working." I said, "Give it a minute" and twenty seconds later the network disconnected. He asked me, for the record, if I tried the full reset, etc. He then asked, "So you'll be OK with a replacement phone?" The whole process took 15 minutes.

The longest part of the process is done at home: restore from backup, iTunes resync, etc. (Interesting to me how this is not completely intuitive. The initial restore only restored native apps since I hadn't connected this phone to my iTunes account.)

For those who are under warranty and lucky enough to get to an Apple store, I think if you go in with a positive attitude of understanding and have done your homework, you should have a good experience. Out of warranty, your mileage may vary.

Good luck.

PJI

PS. The G at the Bar told me he hadn't really seen this problem. Again, this leaves me to believe there is a specific lot of phones with this problem.