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SIM Application Toolkit (STK) is a standard of the GSM system which enables the subscriber identity module (SIM card) to initiate actions which can be used for various value-added services. [1] Similar standards exist for other network and card systems, with the USIM Application Toolkit (USAT) for USIMs used by newer-generation networks being ...
[1] [2] The specification was originally part of the GSMA's work on eSIM [3] and it is important to note that remote SIM provisioning is just one of the aspects that this eSIM specification includes. The other aspects being that the SIM is now structured into "domains" that separate the operator profile from the security and application "domains".
If the phone is stolen, it can be tracked by "find my phone" services, while a physical SIM can be removed. [34] The risk of damaging a SIM socket's delicate contacts inserting and removing a SIM is eliminated. Phones with eSIM only do not need to be built with hardware SIM holders or means to insert them.
A SIM box (also called a SIM bank) is device used as part of a VoIP gateway installation. It contains a number of SIM cards, which are linked to the gateway but housed and stored separately from it. A SIM box can have SIM cards of different mobile operators installed, permitting it to operate with several GSM gateways located in different places.
If the phones were not locked, users might sign a contract with one company, get the discounted phone, then stop paying the monthly bill (thus breaking the contract) and start using the phone on another network or even sell the phone for a profit. [2] SIM locking curbs this by prohibiting change of network (using a new SIM).
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).
The first phone to include dual SIM functionality was the Benefon Twin, released by Benefon in 2000. [7] More dual SIM phones were introduced in about 2007, most of them coming from small Chinese firms producing phones using Mediatek systems-on-a-chip. They started to attract mainstream attention. [8] [9]
EMV contactless symbol used on compatible payment terminals. EMV stands for "Europay, Mastercard, and Visa", the three companies that created the standard.Contactless payment systems are credit cards and debit cards, key fobs, smart cards, or other devices, including smartphones and other mobile devices, that use radio-frequency identification (RFID) or near-field communication (NFC) for ...