I'm sorry, but Apple does not provide a downgrade path for iOS. Because downgrading is unsupported by Apple we cannot discuss it on these forums, but you can use Google to find information on how to install an older version of iOS on any iDevice.
My problems stems from the wifi difficulty. I upgraded to ios 6.0.1 and cannot connect to my home wifi, even though I do have the right password. Any assistance on that? I have tried it several times, and have restored my iphone, and still does not recognize the wifi.