trobuleshooting my wifi with my iphone

I have the same problem since downloading the latest IOS I dont know if this has anything to do with it but all I have now is the WI and turn on/off blanked out and nothing else shown I have dumped everything and re-loaded the phone software via i tunes and still nothing takes 3 G but nothing else probable take it down to shop/apple shop at kingston for them to look at I just dont know what to do other than that as there does not seem any other controls/systems I can see

I have the same problem of you two as well. Once I upgraded for IOS 6.1.3, my wifi just stopped to work. After do almost everything I could, I am still without no wifi available. How could I change and fix that. I can not living without wifi. The 3G and 4G here in Brazil is terribly slow and expensive