After updating iphone 4g to 6.0, phone cannot find wifi.

I recently updated to 6.0 on my iphone 4g.

Since having updated my 4g cannot find any Wi-Fi signals. My wife's 4s is having no problem with our network.

My 4g will not pick up known networks when typed in.

I have Reset Network Settings and I have Reset All Settings.

Nothing has solved the problem.

I am going to go purchase a Samsung Galaxy III if there is no solution by the time I head to AT&T tomorrow at lunch.

I am disgusted by Apple updates. My wife previously had the iphone 4g and after an update it stopped turning on. AT&T had to upgrade her to resolve the problem. This is the second time we have had issues that render our iphones obsolete-- no more, enough is enough.