1. *#0011#\r
2. Pres menu buton and select wifi\r
3. Turn of wifi power safe mode off\r
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How to fix\r
Samsung Galaxy S3 Wifi Issues \r
Samsung Galaxy S4 Wifi Issues \r
Samsung Galaxy S5 Wifi Issues \r
Samsung Galaxy Note 2 Wifi Issues \r
Samsung Galaxy Note 3 Wifi Issues etc\r
Android 4.3 Jellybean\r
Android 4.4 Kitkat