I already have home internet. Do I need a router to get wi-fi so I can use my lap top and other portable devices?

[iternet dummy]

I already have home internet (modem). Do I need a wi-fi router to get wi-fi so I can use my lap top and other portable devices?

 

[Emerald]

Yes if you only have a modem you will need a router to share the connection with multiple devices.