iOS 4.3 cannot connect to 802.11n at 5.0 GHz

I just connected to my Apple Airport Extreme Base at 5Gz with no problems.

Could it be the old issue where iPad is having problems connecting at 802.11n with third party routers? If memory serves, we had this issue a while back and it was resolved with a quick iOS update from Apple.

I appear to be experiencing the same issue. I'm using a Linksys WRT600N (running DDWRT). I cannot connect to either of my 802.11N networks (in 2.4ghz or 5ghz spectrum) after the 4.3 upgrade. 4.2 was able to connect without issue.

I can connect to the 802.11G on my WRT54G.

I had the same problem. Hwever this course of action worked:

1. Touch ">" symbol to the right of your network name.

2. Touch the "Forget your network" pad.

3. Go to the list of networks and choose "Other" by touching ">" sign.

4. Type the name of your network. Touch ">" sign to choose security. Then in my case nothing happened, but when I touched the backarrow pad, I was presented with a choice to input my password. After you typed in the password, there will be a button on your "virtual keyboard" that says "Join". Touch the button and you should be on your way.

It worked for me, but I find the whole experience incredibly puzzling and not to Apple's usual standards of simple interfaces.

following the above instructions to manually add a network is still a #FAIL
I have this issue on Apple TV2, iPhone 4, as well as iPad

Same problem as OP. I was using a dlink dir 655 on 2.4ghz n but have since had to switch is to g and n. I have always though that running them together like this forces the router to drop to the lowest speed of the devices using it. So I feel like I am dropping to g. Mbp and iMac connect to the n network just fine.

I find that my iPad only works well with N on 2GHz Band, I just brought the AE dual band, and when connected to the N on 5GHz it very slow and bursty, very fast on the 2Ghz band. Not good at all.

I'm noticing similar issues. While I can connect to my Netgear router via 5GHz 802.11N, the iPad fails to route data--connection stays up.

Switched to 2.4GHz and connection seems fine now.

Same issue here, I was running fine on N speed on my WRT310N until I updated to 4.3 , My two MBP's work fine on N, I had to change the router to mixed and then the IPAD (4.3) would connect to my network..

Come on Apple - what gives?

My ATV2 and iPad can no longer connect to my 5ghz n network after 4.3. And my router won't run dual band. Well time to DFU mode the iPad and atv2 and downgrade them

I also have a cisco e3000 (linksys) router

Message was edited by: TallBearNC

Apple is STILL signing IOS 4.2.1 so re download it and DOWNGRADE your ipads if you need to until they fix the wireless issues in 4.3. I just downgraded all my ipads and ATV2s back to IOS 4.2

After downgrading to 4.2.1, I can successfully use wireless N on my IPAD.

thanks Apple..

I just talked to apple phone support. They are only just becoming aware of this, and apple will start watching these threads now.

Some ppl don't notice this 4.3 "oops" because their routers run in mixed A/N modes @ 5ghz, and after iOS 4.3 the iPad and atv2 cant do 5ghz N, but will fall back to 5ghz A if the router is in mixed mode. The rep said most ppl with apple routers are probably in mixed mode and they should verify if they truly can or can't to N at 5ghz but putting the apple router into dedicated N only mode. Apple wants to know if this problem is isolated to just non airport routers

If ur stuck with 4.3 on an iPad or ATV or ATV2, and cant do 802.11n @ 5ghz, call apple. The more ppl who call, the faster 4.3.1 gets pushed out with fixes

Message was edited by: TallBearNC

I'm having the same problem after upgrading my iPhone 4 to iOS 4.3. Using a d-link router at home with wireless N, and iphone can't connect at all, but wireless g network at work is fine. Also tried changing settings in router at home back to wireless G and iphone connects fine. iphone was working fine on wireless N before the upgrade to ios 4.3. Took it into the apple store, and they said I needed to take my router in for them to have a look at. Apparently 'no one else is having this problem'. They didn't get the point that the upgrade to 4.3 stopped it working!

Anyone else thinking of coming to buy a HTC Desire HD with me!? :o)

I upgraded my iPhone4 to 4.3 last night and it's killed my N only connection! I have a Linksys WRT320n router and has been faultless on N only, 2.4ghz for my iPhone4, iPad and my girlfriends iphone4. I've only upgraded my iPhone so far, as I don't trust 4.3 to go on the other devices in my household! 4.2.1 was solid for me.

I tried changing my router (which is on latest firmware) to have no wireless security key, disabled DHCP and used static ip on my phone, changed to 5ghz, reset the router, reset the iphones network settings, manually input the network details, deleted the ipsw file and restored my phone as a new one. Nothing worked in any combination apart from downgrading my wireless settings on my router to either mixed mode, or B or G only (which I'm not happy about as ALL devices in my house are N compatible.

I reported this to Apple today and they told me that no one has reported this issue to them yet! I pointed them to these forums to say that many people are having this problem and something MUST be done about it. My call has now been logged and escalated to senior technicians.

So please people, report this officially to Apple otherwise nothing will get sorted for some time and we've paid hard earned cash for these devices, only for another flakey update to spoil them again!

I am having the same issue on my iPhone 4. After the upgrade to 4.3 the phone no longer detects my wireless N network(Time Capsule - Dual Band). It does however connect fine to my wireless G network. Hope Apple has a fix soon.