IPhone 4S no longer seeing 5 GHz Wifi signals with iOS 7

iPhone 4S no longer sees 5 GHz wifi band.
With iOS 6 the phone saw and connected to the 5 GHz band.
I just updated to iOS 7 and the band is not even shown.
The 2.4 GHz band was always seen, and now it's the only one.
Restarting did not ameliorate the problem.
Solutions?

Try resetting network settings. General > Reset > Network Settings You will have to put your wifi password back in.

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