A:
I'm not sure what you mean by WiFi system..I'm not a super tech genius, but if you already have both a router and a modem you don't need to buy another one. You generally HAVE to BUY access to Wi-Fi--the ability to go on the internet at all--from an internet service provider. After you have everything you need, you can set up a private "home network" in addition to a "public network" on the Wi-Fi you receive through your selected provider if you'd like. You MUST have a modem AND a router to connect to Wi-Fi to begin with and the internet service provider provides the channel through which your Wi-Fi becomes useful and gives you actual access to the internet. It's like with you have a TV. You either need equipment to connect to it (like a modem and router do for your Wi-Fi) to watch movies on it and/or you need to pay for the channels (like your internet service provider) of TV you want to watch. Otherwise, your TV is just a useless electric box. Also, with smart tvs now, you STILL need connection to the internet and will still need a modem, router AND internet service provider. The Netgear modem/router combo is really convenient, because you only need to buy the one box for both functions, but you still need to choose an internet provider. Hope I helped at all..good luck!