Reply To: SIM CARDS
A SIM card identifies you to your cellular service provider. So you’d only need one if your iPad is capable of cellular data and you’d like to use it (something like 3G or LTE). A SIM card is not necessary to use your iPad with WiFi.
If cellular data is something you want, simply contact the company you’re planning to get service from and tell them which iPad you have and that you need a SIM card. They’ll probably charge you for it, but it shouldn’t be more than a few dollars.