My iPhone won't connect to the Wi-Fi after the ios 6 update?

So I'm at uni and before the iOS 6 came out I was using the Wi-Fi quite happily, everything was working and had no problems. When it came out I updated my iPhone 4s straight away and as soon as it was done, I could not connect to the Wi-Fi. I have found it can connect to other Wi-Fi's away from my uni, but using the Wi-Fi here is quite important as I'm in a really remote area and the cellular data is so slow! Before you suggest anything I have to say I have rang Apple and asked for help. I have done everything they have suggested; reset network settings, reset the whole phone which meant losing everything. Everything they have suggested I have done! Even Googled everywhere… It also isn't the uni's problem as they have even reset there internet as I wasn't the only one experiencing problems and it still doesn't work. What the hell do I do? I'm tired of it not working!

Added (1). Yeah call me stupid… Just tried to do what you said but got confused and nothing worked haha!

Iphone… Y you NO connect to internet

I had same problem, try turning on cellular and then sign in to apple all of that b.s then connect to wi-fi wait a little bit then turn off cellular, if it dosent work then call your local apple store for help… But this is what worked for me so?

Just try "Reset network Settings" or reset your home network. If nothing helps restore your iphone.

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