No Wi-Fi connectivity after upgrading to iOS 5.1.1

1. Reboot router

2. Reset Network Settings

3. Try a reset. Hold the Sleep and Home button down for about 10 seconds until you see the Apple logo. Ignore the red slider.

Same problem, but with a first-gen iPad. Upgraded Monday night and now the little wheel just spins and spins. Phone works fine and so does the new iPad I'm writing this on. I'm going to the local Apple Store in the morning. If I learn anything I'll post it here.

Same here. Upgraded both my iPad and my 3GS. iPad works fine but my iPhone sees no Wifi networks. Not at home and not at word. Tried resetting the router and the networksettings in my phone. And of course a reboot. To no avail.

So please Apple fix this! Or give us a simple way of downgrading to a lower version of iOS

Beware that downgrades to the version before (iOS 5.1 in this case) the upgrade will only work for 2 weeks. It's a SHSH blobs thing.

I have noticed that after the upgrade to 5,1,1 that my iPad's antenna wifi indicator changes strength a lot! It will vary from all four wifi bars down to none at times...even telling me that there's no Internet connection at times when I know my routers up and running fine!

I think the update broke something.....

Not sure where you see four bars for the Wi-Fi strength indicator.

I get to see the symbol for maximum strength shown on that page:

http://www.apple.com/support/ipad/assistant/wifi/

Even if your Wi-Fi router is up and running, this doesn't mean that it's actually connected to the Internet.

Did you check this?

Try the following:

- reset the iPad: hold Sleep/Wake + Home buttons until the Apple logo pops up

- reboot the Wi-Fi router

- choose "Forget this Network" for your network on the iPad

- now check whether the iPad discovers your network, then re-enter the data for your network

For the upcoming test phase make sure you're within a few feet of your Wi-Fi router.

Just got home and it works flawlessly again... I hope the problem will not return...

Frequent wifi disconnections here also since upgrading to 5.1.1.

It reconnects right away when I go to wifi settings and choose my network, but disconnects again shortly afterwards.

Prior to the update I had no such issues.

Yes, the curved bars on the wifi assistant page are the "bars" I am referring to. It's always been my understanding that, just like the linear AT&T bars to the left of it that the number of the curved bars lit-up indicate your relative wifi signal strength. After the 5.1.1 update my curved bars move between one and and the max number often even if I'm stationary and there's no change to my network.

Prior to the update it was stable at the maximum curved bar count.

What you did not mention is the distance between the iPad and the Wi-Fi router, also whether there are any obstacles between the two and whether you have changed the position of the Wi-Fi router.

You may notice a drop in signal strength of the Wi-Fi signal beyond as little as 10 meters when using an iPad.

Any obstacles in between will of course weaken the Wi-Fi signal even more.

Ok, let me explain this again. I can be sitting at a table with a perfection motionless iPad. My Wifi signal strength will indicate as "full" according to the curved bars...and it can fluctuate anywhere from one "bar" to "full" within seconds. It's never fully "full" like it was before the update. Before the update I could sit at the exact same location (my dining room table) and it would register "full" bars for the wifi signal and it NEVER dipped below full. Now it does so all the time.

Nothing has changed in my network settings. No obstacles have been introduced into the environment that were not there before 5.1.1.