IPhone connects to Wifi but not Internet

So, all of my roommates are able to connect to the internet, and even my laptop (from which I am writing now) can! It's simple and easy! But, my phone will connect to the wifi and show the tick mark next to it, but it won't allow me to use internet access! I tried all the stuff, resetting the network settings, resetting it all, and updating it to the newest IOS system. I'm just frustrated because I don't know whats wrong!

Thanks!