A subscriber identity module or subscriber identification module (SIM), widely known as a SIM card, is an integrated circuit that is intended to securely store the international mobile subscriber identity (IMSI) number and its related key, which are used to identify and authenticate subscribers on mobile telephony devices (such as mobile phones and computers). It is also possible to store contact information on many SIM cards. SIM cards are always used on GSM phones; for CDMA phones, they are only needed for newer LTE-capable handsets. SIM cards can also be used in satellite phones, smart watches, computers, or cameras.
The SIM circuit is part of the function of a universal integrated circuit card (UICC) physical smart card, which is usually made of PVC with embedded contacts and semiconductors. SIM cards are transferable between different mobile devices. The first UICC smart cards were the size of credit and bank cards; sizes were reduced several times over the years, usually keeping electrical contacts the same, so that a larger card could be cut down to a smaller size.
A SIM card contains its unique serial number (ICCID), international mobile subscriber identity (IMSI) number, security authentication and ciphering information, temporary information related to the local network, a list of the services the user has access to, and two passwords: a personal identification number (PIN) for ordinary use, and a personal unblocking code (PUC) for PIN unlocking. In Europe, the serial SIM number (SSN) is also sometimes accompanied by an international article number (IAN) or a European article number (EAN) required when registering on line for the subscription of a prepaid cards.

View More On Wikipedia.org
  1. H

    o2 UNLOCK SIM UNKNOWN APPLICATION HELP

    o2 UNLOCK SIM UNKNOWN APPLICATION HELP
  2. H

    Clone Nokia XL Dual SIM MTK6582 Flash File Need

    Clone Nokia XL Dual SIM MTK6582 Factory Firmware need plz ...
  3. J

    Nokia 100 RH-130 Insert Sim Solution

    Nokia 100 RH-130 Insert Sim Solution
  4. J

    nokia 100 RH-130 inser sim done by jumper

    nokia 100 RH-130 inser sim done by jumper
  5. R

    Nokia 105 insert sim solution

    this is nokia 105 insert sim problem solution
  6. U

    Superior Sim Ultra + Now Supported IOS 7.1.2 ,7.1.3 And IOS 8 Beta1,2, 3 (DEV Edition)

    Hi, All, I Found This Post in Howard forums and share here I am Muhammad Tariq From Pakistan Islamabad,I have an Shop And I Sale iPhones,iPhones Unlocking and All iPhones Accessories, I have Some Bigger And Graetest News For All iPhones Lovers Who have iPhone 4 With(below supported ios...
  7. U

    I Am back With Greatest News iPhone 4 IOS 7.1.1 With BB 04.12.09 Or 8.0 Beta 1 or 2 Now Unlockable with Superior Sim Ultra+

    I Am back With Greatest News iPhone 4 IOS 7.1.1 With BB 04.12.09 Or 8.0 Beta 1 or 2 Now Unlockable with Superior Sim Ultra+. Hi I am Now In USA NEW York and Here I Open An Small Mobile Phones Sales And Repiaring Store Also Here Many Clients may Upto Thousands Numbers Of Clients DSays There...
  8. P

    Please Need Code For Nokia E 71 To Unlock netword sim

    HI guys can anyone help me to unlock Nokia E71 Network Sim IMEI : 352710044545067 Thanks in advance
  9. N

    samsung c3312 sim lock usb not work

    samsung c3312 sim lock usb not work help me
  10. O

    S-5670 sim ways please.

    Plz help. Samsung s-5670 sim ways/ jumper ways please. I accidentally removed the sim tray and it came off with the sim tracks...... Plz help...... Its urgent... Thanks.
  11. M

    nokia 2600 not charging + insert sim

    nokia 2600 not charging + insert sim any solution?
  12. N

    samsung n9005 sim network look

    samsung n9005 sim network look help me sir.
  13. C

    sim card tool kit not in micromax a67

    sim card tool kit not showing in micromax a67
  14. K

    Gfive w2 4 sim tested file needed

    any have plz give mi flash file g five w2 4sim tested file i am try many file but after 93% stop flash
  15. M

    how to sim unlock samsung s52222??

    how to sim unlock samsung s52222
Top