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What Is A SIM Card For A Cell Phone?  by: Johnny McKenzie A SIM card for the phone is like having a small computer in your computer. The SIM card stores a lot of data such as your messages, whether text or pictures, your phone number, reminders, files, value added services etc. What determine the phone number are actually the card and not the phone. In fact the mobile phone company keeps track of all your calls whether incoming or outgoing through your SIM card. They can identify the precise city and country that you have taken the phone to. In this way, the company charges you for the calls. The SIM card is actually called a Subscriber Identity Module and is the size of a thumb impression. This tiny chip is a small microprocessor, but it packs in a lot of data and information. It’s inserted into the back of the cell phone that one is using and only then can the cell phone be activated. As soon as the cell phone is activated, it’s connected to the network of the cellular phone company. Thus one can start making and receiving calls. Therefore when you switch over to another mobile company, you need to purchase another SIM card to make and receive calls. SIMS can have a memory of 16kb to 64kb as of today. Of course with convergence happening, SIM may have larger memories to take care of many operations. There are two types of connections for SIM cards. One is a prepaid connection where you for a fixed calling value, let’s say $10, can get for example 100 minutes of talk time. The second option is that of post paid. After every billing cycle, the cellular company will charge you, dependent upon AA you can run a bill of $100 dependent upon the usage. About The Author Johnny McKenzie enjoys making cheap phone calls using worldwide calling cards. He also runs a site about long distance phone cards. This article was posted on February 23, 2006   View More Videos from the "Gadgets and Gizmos" category: Dead Rising 2 Overview: What Would Chuck Do CSI: Deadly Intent Trailer Part 1 Need for Speed Hot Pursuit "Police Chase" Trailer Akibatteru 16 - Tokyo bay cruise and Suginami Anime Museum   Read More Articles from the "Gadgets and Gizmos" Category: An Easy Way to Retrieve Deleted Text From a SIM Card by Ed Opperman How To Save On Cell Phone Bill by Steven Chang Panasonic TX-P42S10B Review: A Well Priced 42 Inch Plasma TV by Alex Bradbury Do A Triple Take With The Nokia 3250 Phone by Ronald Doherty GPS Watches Help Monitor Five Areas While Training by Pam Daugherty Plasma TV Screens – Pros, Cons And Advice by Gabriel Adams Binding Hard to Bind Papers With Fastback Tape Binding by Jeff McRitchie An Answer to The Question ';How Can I Retrieve Deleted Text From a Samsung GSM Cellular Device'; by Ed Opperman What Satellite TV Can Offer You? by Allisohn Jane Perez Nokia N9- A Round Up On Nokia’s Latest MeeGo Operated Smart Phone by Caroline Telford << Back to "Gadgets And Gizmos" Index

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