This is a galaxg S4 help section so help probably won't come.
1: Go to the XDA forum Index.
2: Go to the section "Android development and hacking".
3: Go into sub category "Android q&a, help and troubleshooting".
4: Post this there.
Hopefully you find help there. By the way you can ask a mod to move this thread there as well.
P.s try changing your wifis encryption, android devices have issues with some wifi routers/encryption.
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