Galaxy S3 authentication error

[Koyoo]

Im dumb with technology so please say it in a way I can understand. So my phone will not connect to any wifi, it just keeps saying authentication error. My password is correct, for all wifi connections. Why and how do I fix it?

 

[B. Diddy]

Duplicate, see response here: http://forums.androidcentral.com/samsung-galaxy-s3/750445-galaxy-s3-authentication-error.html. Thread closed to prevent parallel discussions.