Subscriber identification module is known as SIMCARD. Subscriber identifies module (SIM) that is intended to securely store the international mobile subscriber identify, Which are used to identify and authenticate subscribers on mobile telephony devices through number and its related key such as computer and mobile number Gsm phone only can access SIM card. There is a possibility to store many contact numbers and their information, There are only need newer for CDMA phones, and LTE-capable handsets. It can also access or insert (by click here option and we insert on smartwatches, computer, cameras or satellite phones) UICC Universal integrated circuit card is a functioning part in the SIM circuit in physical smart cards PVC Which is usually made with embedded contacts and semiconductors. SIM cards are used in different mobile service the first SIM card size were the size of bankcard and credit card size were according to the technology development. Its size also developed.
History and design:
The basis of the SIM card which of the silicon integrated circuit [IC] chip. It is a type of SIM card IC chip onto a plastic card originating from the late 1960s MOS integrated circuit chip, along with MOS memory technologies they are flash memory and electrically erasable programmable read-only memory (EEPROM) European Telecommunications standards institute in the specifications with the number TS 11.11 by them SIM was initially specified. Through this describe the logic behavior and physical of the SIM With the development of UMTS and its specifications works are transformed into 3GPP. It is responsible for, development of the application Gieseckeand deviant who develops SIM card and Munich smart card in 1991. The voltage of SIM cards is operating in this way they are 5v, 3v, and 1.8v and the majority of SIM cards launched before 1998 was 5v SIM card when they SIM card allow application load by the subscriber. Initially written in native code using proprietary APLS by the SIM toolkit application.ETSI chose java card to provide interoperability of the application. The global platform is some extensions on the card, feature with additional APLS like more cryptographic security in SIM card
User identification number:
Integrated circuit card identifier (ICCID) by each SIM in internationally identify for the chip by the actual SIM card. To identify the sim profile through the ICCID number and it not only for physical SIM cards. As the primary account number recommendation E118 ISO / IEC 7812, the layout based on its number must be in seven-digit far issuer identification number (11N) fixed for telecommunication process is 89 major industry identifier (M11). It contains 2 or 3 digits as country code and 1-4 digits for issuer identifier. Individual account identification number its length is variable but it was under one 11N has the same length algorithm. (Unique international mobile subscriber identify (IMSI) are identified on their operation network, through their IMSIS they can operate the mobile network, connect mobile phone calls and communication, in this first three-digit represents the mobile country code (MCC) mobile network code identify on next two or three-digit E.212 are allowed three-digit MNC codes, but it was mainly used in the united states and Canada, next digit represent (MSIN) it means mobile subscriber number. The total length of IMSI should be than 15 digits, normally there are 10 digits they differ according to their country then generates a random number by the operator network.