Originally Posted by allanlaw
Check the security settings on the router and make sure you've got them tracked on the S4 (also consider if you have MAC filtering engaged on the router).
i dont have mac filtering enabled and what security settings you mean? I am using a WAP2 Personal password and it's 100% right on the S4
this problem never happened on the S3
BTW, I tried connecting on the 2.4 GHz. and 5 GHz. channels of my router but same result