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How does a SIM card work?

In: iPhone, SMS and Texting [Edit categories]

Answer:

Answer

A SIM (Subscriber Identity Module) Card works by storing information about your phone service (e.g. your phone number) so that the phone it is inserted into knows what service and account to use.
You cannot call text or socially use your phone without one

First answer by Cybiko123. Last edit by MaxRide66095. Contributor trust: 0 [recommend contributor ]. Question popularity: 146 [recommend question].

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