The SIM card is the most important thing that is bought after the purchase of a phone or iPad as it lets the device connected to the cellular network. The cellular network connectivity is important because it lets the user make calls and send messages. Additionally, the cellular network also provides internet connection. The SIM card is inserted in a connector in the iPad which is comprised of the body which is connected through multiple receptacles in order to receive conducting terminals. The iPad air comes with a NANO SIM card holder which is the fourth version of SIM card. The understanding of SIM card holder functions can be technical and with these technicalities come the threat of damage to the SIM card holder and the connections it has into the device which can results into a completely non functional SIM card.