Can't access internet but I'm connected to wifi. I have been using my dorms WiFi forever -- but since the latest system update on my S3, it won't get internet even though im connected to the WiFi (status says I'm connected -- but the icons in the notification areas stay white). Its like that all over campus. Other places I can use the WiFi without any problems.

Immediately after the mentioned update, internet worked for one more day on my phone in my dorm, but after that only other WiFi networks seem to work for me.

I have no idea what the reason could be. Any ideas what I should look for?
Have you tried dialing *#*#526#*#*   ?

It fixed a wifi connection problem I had.

I dialed it on the phone, got the "call cannot be completed" message. Hung up, restarted the phone, then went through the whole phone call again.  

It worked. My wifi problem is fixed.  I kid you not. Google it. I hope this helps.