So a few days ago, i can connect to the wifi and do everything as usual.but today, something happen.. when i get home from church, i realize that my S3 cannot connect to the wifi and it says "authentication failed" wrong password.. i tried it 3 - 4 times.. it still not working.. even with the right password.when i tried to connect from my ipad mini, its working with the same password that i tried before with my S3.. i tried everthing i see on youtube.. no helps.. any suggestion?