What is the best wireless internet provider for a Dell laptop?

Im thinking of buying a Dell laptop 1501. I need a wireless internet provider/card/whatever that has good speed and that can work whether I am at my job, library, and home.|||it's called WiFi and it is built into the computer as a standard option. you just need to find an open signal. just wait until you get it and fool around with it and you will figure it out.|||The Dell I1501 will come with a Wireless adapter built in.