I use a Verizon Air Card...works the same way cell phones work kinda...You just stick a little thing in your USB port and off you go!( Of course, theres some software to download which comes with the aircard, but its easy!....But....remember.....5 Gig limit on usage. And, If you use a router, good luck....I finally got a 250$ aircard router which the aircard plugs into, then sends signal to your computers via usb adapters....We can get into that later.
Runs about 60$ a month!
your friend,
john