Galaxy S5 problems with WiFi and Network

[kidonccs]

Hi there!
I have an S5. The problem? When i get home, it doesn't allow me to connect to my WiFi router UNLESS i turn off the 4G/3G network coverage. When i do it, it allow me to use WiFi. Is there something i could do? I don't want to deactivate my network everytime i need to use wifi.

Thanks in advance

 

[Golfdriver97]

In Settings under wifi, there should be an advanced menu. Is there something there that might help?