YW Tor. If i’m correct, you had to couple the s5 with wifi while setting it up.
To reserve an IP address (set it as fixed IP), in short:
Open your routers’ webinterface.
In case of a KPN router: At the LAN section, look for the DHCP section, and then DHCP bind. Here you can link the MAC address of the s5 to the IP address it has at the moment. Now the s5 always uses that IP.
Screenshot (partly anonimized):
If you need any more help, just ask.
