A SIM (Subscriber Identity Module) is a smart chip card that is placed under the battery of a SIM based cell phone. It is called the digital brain of a mobile phone and works similar to a computer hard disk. SIM Cards contain microprocessor chip that stores information pertaining to your account and phone number. It identifies the network and gives you the telephone number. Your mobile handset gets activated only when you insert a SIM card. This strangely small memory chip holds plenty of information including personal identification information, phone numbers, text messages and more. SIM Cards can store data such as telephone contacts, network provider and various other value added services. So when you insert your SIM card in a new mobile handset, you can avail the same information and services that were available to you on your previous mobile phone.
SIM Cards
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