| Mobile phones have today become a necessity of | | | | this chip is that it carries with itself an intrinsic |
| modern day living. It is the most popular and easy | | | | telephone number. The user, who puts a particular |
| way of remaining connected all the time with your | | | | SIM in his mobile phone, becomes the owner of that |
| family, relatives, friends, business associates, clients | | | | particular mobile phone number. If a SIM is taken |
| and customers, irrespective of distance. Whether it is | | | | from one instrument and put in another, then the |
| in the same city or on foreign shores, the mobile | | | | second phone carries the number. Similarly, if a new |
| phone, being portable, can be carried anywhere and | | | | SIM is put in the first phone, then that instrument |
| everywhere. But, without the SIM card, this | | | | answers to the call of the number carried in the new |
| instrument is absolutely useless. | | | | SIM. |
| The SIM (Subscriber Identity Module) card is very | | | | The memory of a SIM card varies. Major Service |
| small, even smaller than a thumb impression, but | | | | providers like O2, Vodafone, Orange and T-Mobile |
| without it your mobile phone is a worthless and | | | | have now started providing exciting features and bill |
| useless piece of plastic. The card is a data bank for | | | | plans in order to attract more and more customers. |
| the mobile phone and without it the user cannot | | | | All mobile companies majorly offer two kinds of |
| make or receive calls, send or receive messages | | | | services: prepaid and post paid. Even consumers can |
| listen to music and click photos. It would not be | | | | now change their number, their service provider and |
| incorrect if we compare the SIM of a mobile phone | | | | the billing plan at the drop of a hat. |
| to the CPU of a computer. It is like the brain and the | | | | It is on the basis of the SIM card provided by mobile |
| heart of the mobile phone. | | | | phone services providers that a bill is generated at |
| The SIM card is in the form of a tiny chip which is | | | | the end of a billing cycle, and the consumer is |
| actually a microprocessor that stores all the data and | | | | charged according to the usage. |
| information of the mobile phone. The main feature of | | | | |