The 9.7-inch iPad Pro, 12.9-inch iPad Pro, iPad Air 2, iPad mini 4 and iPad mini 3 models with Wi-Fi + Cellular can use either the Apple SIM card or a carrier-supported nano-SIM card. The 9.7-inch iPad Pro includes an embedded Apple SIM card. iPad Air, iPad mini 2 and iPad mini models with Wi-Fi + Cellular use the nano-SIM card. All other iPad models use a micro-SIM card.
More information on iPad support for 4G LTE networks by carrier and country or region