When I had dial-up I was able to share it with my two computer at the same time. As for the OP just use wifi or buy a data plan.With dialup, you cant share it, it only allows one connection at a time, trust me I tried when I had dialup. Until you can upgrade to something a little more faster, youre stuck with one computer connected at a time. If you can get DSL, get it, because it will be a little faster, and will allow more then one computer on at a time.