Apple iPad uses a MicroSIM instead of normal SIM card. And many operators can just give you a normal SIM. So what’s the solution? How To Convert a SIM to a MicroSIM with a Meat Cleaver! article tells that you can do the conversion from normal SIM to MicroSIM with a chopping board, a meat cleaver and a pair of scissors – simple! There is a good series of pictures and description how to do the job.