iOS 4.3 breaks wireless N @ 5GHz on all devices!

dduttonnc said:

4.3 is bugged! If u upgrade your atv2, iPad, and ip4 will no longer b able to do 802.11n @ 5ghz. They can still so 802.11a at 5ghz. Apple confirmed this is a bug and a 4.3.1 release will b needed to fix it

This is a huge issue for me as the 2.4g band in my neighborhood is saturated. So I downgraded everything back to 4.2.1 (apple is still signing and validating it)

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Having same issue. So I switched down to a @ 5ghz band and now my ipad connects to the channel but now my iphone 4 does not see the 5ghz band. Ugh apple please get 4.3.1 out pronto to address this. Highly annoying. I wish I would have waited to upgrade to 4.3 on my devices.

The iPhone 4 isn't supposed to have a 5GHz radio, so I'm not following what you guys are saying. From the Apple iPhone 4 spec page:

802.11b/g/n Wi-Fi (802.11n 2.4GHz only)

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dduttonnc said:

4.3 breaks N on 2.4ghz band also. So ur ip4 is falling back to G

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OK, I was commenting on the "iOS 4.3 breaks wireless N @ 5GHz on all devices" part. I'm running 4.3 and using 802.11n @ 5GHz without issue on my iPad. My macs and atv2 are running fine on 802.11n @ 5GHz. I'm not saying it may not be an issue for some, just not for me. Although, I'm not running my router in mixed mode since it doesn't have dual radios (using an old bridged 802.11g router for the 2.4GHz devices, like my iPhone 4).

You're saying specifically 4.3 breaks 802.11n @ 2.4GHz?

it seems this fixes this issue: