The SIM card is the most important thing that is bought after the purchase of a phone as it lets the phone 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 phone which is comprised of the body which is connected through multiple receptacles in order to receive conducting terminals. The iPad mini 4 comes with a NANO SIM card holder which is by far the smallest in size but stores and provides same amount of data as the older versions. 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 phone which can results into a completely non functional SIM card.