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Introduction
SIM cards are the most important part of a cell phone that runs on a GSM network. They enable the phone to receive signal from a mobile phone company. Many people who have phones that accept SIM cards find it extremely easy to simply swap out their SIM card for a new SIM card when in a different country.
What is a SIM Card?
SIM cards are formally called Subscriber Identity Module cards. While the first SIM card appeared in 1991, they have been seeing an increase in use due to their ease and their simple design. When compared with a phone that uses CDMA technology, phones that have SIM cards in them offer lower prices and lower rates, especially outside of the United States. When you are traveling to a foreign country, all that you need to do in order to use your GSM, SIM-card enabled phone is to purchase a new SIM card that works for the country that you are in and add credit to it.
Read more : http://www.ehow.com/how-does_5050449_sim-card-work.html
What is a SIM Card?
-
SIM cards are formally called Subscriber Identity Module cards. While the first SIM card appeared in 1991, they have been seeing an increase in use due to their ease and their simple design. When compared with a phone that uses CDMA technology, phones that have SIM cards in them offer lower prices and lower rates, especially outside of the United States. When you are traveling to a foreign country, all that you need to do in order to use your GSM, SIM-card enabled phone is to purchase a new SIM card that works for the country that you are in and add credit to it.
Read more :
http://www.ehow.com/how-does_5050449_sim-card-work.html
