This enables users to carry out actions relating to their cellular service such as checking their balance and activating service options. You probably already know how to use it to save contact information and a limited number of text messages, too.īut did you know that the SIM card has very little amount of memory that can be used to store program codes? Basic applications are usually pre-programmed into this slot by the network operator who issues the SIM card. Most cell phones have a tiny chip called a SIM card which is something that most of you are probably already aware of.
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