I chose to update my Galaxy S4 Active to 4.3 over night, and when I woke up, it was completed, but trying to use a valid WiFi connection results in "Unable to connect to proxy server" error in the default browser app, and Chrome. I checked my internet connection settings and the proxy settings are turned off, yet it has been having this problem for over a day now. Even though I am having problems, the Instagram app still works fine, and everything is loading fine in it, but apps like Twitter, Snapchat, Google Chrome, and many others are having connectivity problems. The problem isn't my internet, because it is working fine on my laptop, so I have no idea what is wrong. It was working fine before I updated, so it has to be a problem with the new update. It is driving me insane, and it is upsetting that my phone is now rendered pretty much useless! Does ANYBODY have a clue what could be wrong, or know a fix to the problem? Any help would be greatly appreciated!