SIM:

SIM stands for subscriber Identity Module. A SIM has three main features. 

1#  Nano SIM

2# Micro SIM

3# Regular SIM

there are different kinds of SIM and lunched from different companies. for example, SCOM SIM,

Zong SIM, TELENOR SIM, JAZZ SIM,  U PNONE   and so other many kinds of SIM are available. which is used for basically for signaling  or communication.

A SIM  take place a vital role in the development of communication. without SIM our communication system is incomplete. different companies has lunched different SIM for the development of communication and facility of people in the world or a society. 

these companies has give different kinds of packages like , call packages, SMS (short message service) packages, Internet package  on the basic of daily , hourly,  weekly, and monthly. 

according to my observation with the growing and development of our society, changing has become more vital. different kinds of SIM has a different kinds of network services. some cities uses  another SIM, and again another company uses another SIM, because of  their network service availability.

SCOM  stands for social communication organization management now working most costly and furthest areas of the world.

ZONG, you phone JAZZ TELENOR  SIM are mostly used in the city area. in my area SCOM  provide a better service . that is why most of my people uses SCOM SIM for communication. 

SIM is a small like chip, but it has a great role. it is the responsible of whole communication. Each SIM has a special number. one number with country code is provided by you  after your verification.  At the time of verification you CNIC ( National Identity Card  and thumb signature is most important. without these  two thing a company cannot give you a SIM. 

sometime people are using  a SIM in unethical  and unwanted situation.at that time  a company trace you and your number on the basic of your registered CNIC number and SIM verification code. 

take care and be safe from the wrong uses of SIM. only use in accordance of ethical manner.