I currently have the iPad Air and have ordered the 9.7 iPad Pro. I have an old ATT monthly automatically renewable plan that charges my credit card. I hear the new 9.7 Pro has both an embedded SIM card as well as a slot for the removable type SIM Card. So what do I do to transfer the cellular plan from my old iPad to the new one? ATT said I have to wait until I get the new iPad and then go to a store to get a new SIM card Is this true or is there a way to enable the embedded SIM or transfer the old SIM to the new iPad?