Won't connect to WIFI after updating to ISO 07?

I just updated my software on my iphone 4 to ISO 0.7(whatever the new one is) and it won't connect to my wifi. It just keeps trying to connect but never does. When I connected it to my computer it asks if i "trust this computer" yes or no. I say yes and still doesn't connect. This is making me so mad and eating away at my data because I need to use my internet on my phone. Please help someone.