Downgrade iOS 6 to iOS 5
I had a working iPhone 4 running iOS 5. I carelessly let it upgrade to iOS 6. Now it can't access the internet via the LAN at all. I would therefore like to downgrade to iOS 5.
I have read on the internet that Apple does not support that. Is that correct? If so, can someone link to an official statement from Apple to that effect? If not, can someone link to the official procedure for downgrading?
I know that I can wait until hopefully Apple finds out about this problem and then hopefully fixes it but in the meantime I have 2 very expensive telephones.
iPhone 4, iOS 6