Ok, I seem to be a little confused. Do you mean that you will be upgrading your internet service from Dial-up to a faster one such as Broadband internet ( DSL,Cable,FIOS ) or something such as Satellite internet? Or is the ISP rolling out some form of WiFi service to select towns/cities, of which you happen to live in one? Can you give us the name of the ISP and service you are upgrading to?
You might be referring to a WiFI Router, which basically connects to your ISP Broadband modem and then shares the connection in your network to both your wired ( close desktop for example ) and wireless capable devices ( OpenPandora, Ipads, Nintendo DS/Lite/3DS, Sony PSP/Vita, Xbox360, PS3, Wii/Wii U, WiFi printer, various WiFi capable Android / IOS smartphones/tablets, etc.) Depending on your ISP, they may supply you with a Broadband Modem with internal Wifi router ( basically a combo unit ), otherwise you can buy your own WiFi router and set it up in your network and share bandwidth.
...Patnik.