Why is my wifi not connecting?

[AC Question]

why is my wifi not connecting

I have a Samsung galaxy s3 and I always connect it to my school public wifi. but today I tried o connect it and it started showing authentication error I have tried everything including the *#0011# but it still did not work. pls can someone help pls.. I need it now plsss.

 

[SpookDroid]

Re: why is my wifi not connecting

Have you tried forgetting the network and re-adding it? Also, are you sure this is still an open WiFi or that it's not saturated? Saturated networks will usually not let any more users in until a few slots are released.