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A typical SIM card (mini-SIM with micro-SIM cutout) A SIM card or SIM (Subscriber Identity Module) is an integrated circuit (IC) intended to securely store an international mobile subscriber identity (IMSI) number and its related key, which are used to identify and authenticate subscribers on mobile telephone devices (such as mobile phones and laptops).
A card with all 3 features is called a removable user identity card, or R-UIM. Thus, the R-UIM card can be inserted into CDMA, GSM, or UMTS handsets, and will work in all three cases. In 3G networks, it is a mistake to speak of a USIM, CSIM, or SIM card, as all three are applications running on a UICC card.
For GSM, UMTS and LTE networks, this number was provisioned in the SIM card and for cdmaOne and CDMA2000 networks, in the phone directly or in the R-UIM card (the CDMA equivalent of the SIM card). Both cards have been superseded by the UICC. An IMSI is usually presented as a 15-digit number but can be shorter.
Example Number: +880 15 00121121 (Teletalk Hotline Number) Has the following subscription number: MSISDN=8801500121121 MSISDN=CCCXX N 1 N 2 N 3 N 4 N 5 N 6 N 7 N 8
In case of the (U)SIM interface, the most important specifications are: ETSI TS 102 221 - UICC-Terminal interface; Physical and logical characteristics; 3GPP TS 31.101 - UICC-terminal interface; Physical and logical characteristics; 3GPP TS 31.102 - Characteristics of the Universal Subscriber Identity Module (USIM) application
Identity cards, or "Personal ID cards" are issued to all residents aged over 16. [138] As of 2023, eID cards are in development. [139] Marshall Islands: An "Identification Card" seems to exists among citizens of the Marshall Islands, but little information is found on these documents. Mexico
The Type Allocation Code (TAC) is the initial eight-digit portion of the 15-digit IMEI and 16-digit IMEISV codes used to uniquely identify wireless devices.. The Type Allocation Code identifies a particular model (and often revision) of wireless telephone for use on a GSM, UMTS, LTE, 5G NR, iDEN, Iridium or other IMEI-employing wireless network.
E.118 is an international standard that defines the international telecommunication charge card, for use in payphones. [1] It also defines the Integrated Circuit Card Identifier (), which is used in Subscriber Identity Modules (SIMs, including SIM cards and eSIMs. [2]