After iphone 4 4.3.3 update wifi not working

I thought i had the same problem but apparently i found out the problem is the setting in the router. My best guess is that u try to resolve the problem in the router setting first because most office router setting, they tend to limit the IP go inside the their network. what you might want to do is once your techie guy in the office allow your ip to come in, u refresh your network and it should be back alive to normal. my guess probably when u download the update all their IP is reset thus it is becoming unrecognizable and got to do a few setting before it came back normal. Good Luck...

i use wi fi from home. i did change the settings. but the problem persists. in the phone its showing wi fi connected with full signal. yet when i try to go online it says no internet connection. i tried with my friends wi fi also but same thing happening. how do i degrade to 4.3.1? in the process of this i lost all my photos and contacts

I have an iPhone 3GS. Upgraded my software over the weekend to 4.3.3. Now I can no longer receive emails from work, my calendar, or contacts. This totally shuts me down once I leave my office. I called AT&T (not us), I called my IT guys (not us), and now its Apple's turn. If I can resolve, will post results. Otherwise, HTC here I come.

https://discussions.apple.com/thread/3042520?answerId=15170990022#15170990022

just look here

Eureka thats the problem

The iOS 4.3.2 and 4.3.3 for iphone is not compatible with the firmware 7.5.2 for apple airport extreme and time capsule. If the WiFi router is an apple airport with firmware 7.5.2 an iphone with the updated firmware will not be able to detect and connect to the WiFi network.

Solution The iphone firmware can not be downgraded, the airport firmware has to be downgraded

1) Make sure that the settings of your Airport Extreme are in mixed a/b/n mode

2) Open Airport Utility

3) Select Upload Firmware from the BaseStation menu

4) If you current version is 7.5.2, click Upload Firmware

5) Select 7.5.1 from the pop up menu

6) Restore Firmware

Now the WiFi network is detected and connected perfectly as before upgrading the iphone to 4.3.3.

The solution was found herehttps://discussions.apple.com/thread/3042520?answerId=15170990022#15170990022

Downgrading to 7.5.1 solved the problem for me. Thanks!!

You're not alone with this theory.

http://news.softpedia.com/news/iOS-4-3-4-May-Arrive-Before-iOS-5-with-Fixes-for- WiFi-Woes-200065.shtml

Apple won't let this one gain momentum. Not with the location tracking and all...

If you ask me iOS 4.3.4 sounds fairly plausible before 5.0

Let me just add another person with problems. My iPhone does find my Wifi network after a hard reset but loses the connection very quick after. Never had this problem until upgrade to 4.3.3. None of the presented "solutions" work for me.

So, let me ask, who within in Apple did write this code and for what reason ........? Yes, someone did write this code and the person works within Apple.

hey did u end up getting your wi fi to work... i am having the same trouble i even restored it back to its original settings and it still doesnt work.... apple told me its a problem with my router and telstra tell me its a problem with the phone so i am ****** what did u do?... i have tried everything

how do ya fix the problem? is it possible? its ******* me off.... when ya ring apple they act like u r dumb n keep saying to make sure the password is correct

Did you downgrade your router to 7.5.1 as described by AndiXXX above?

i cant do that i dont have an apple router i have a "Thomson TG782T" i am from australia .. its a router telstra gave me

I´m having tha same problem with mi iPad 1. Does anyone know if the problem is related to the Wifi security or authentication method?

Well, I have disbled wireless security on my Linksys WRT160N router and I´m still having the same problem

I just got my iPhone 4 and iOS 4.3.3 working with my Time Capsule 7.5.2 wifi this way:

1. In Airport Utility on Mac, save your Time Capsule configuration by using menu File -> Export Configuration File...

2. Have your Time Capsule restored to default settings by using menu Base Station -> Restore Default Settings...

3. Restore your saved settings by using menu File -> Import Configuration Settings... and use your exported settings.

After trying all the other options listed in this thread and many others, this is the only one that worked for me.