What is a SIM Card?

SIM CardA SIM Card, or a Subscriber Identity Module is just a tiny rectangular memory card that acts like an identification for the phone. Usually located behind the battery, a SIM card stores your phone number and it is required for activating a phone for mobile use.

From Wikipedia:

A Subscriber Identity Module is a smart card that securely stores the key identifying a mobile phone service subscriber, as well as subscription information, preferences, text messages and other information.

The advantage is that you can switch your phone number from one mobile phone to another simply by swapping out your SIM card, as long as both phones are made for the same carrier, the switch is usually relatively easy.

Also, if your phone is not locked to one carrier, you can buy prepaid SIM cards when travelling, allowing you to always have a local number for your destination.

September 20th, 2006 Posted by David in Article at 12:50 pm Comment Now! »
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