Gemalto SIM cards
The SIM, Subscriber Identity Module, is a smart microprocessor
chip for mobile phones used in all GSM and 3G networks (where it
is called the USIM) as well as other digital telephone networks
(IDEN and some versions of CDMA).
Based around a microprocessor, SIM cards are rather like a
mini-computer with its own operating system, storage and
built-in security features; it can add, delete and manipulate
information in its memory and both send and receive data.
Originally designed to allow access to mobile phone networks, it
authenticates the subscriber and ensures they are billed
correctly for the airtime they use. The SIM also allows for the
storage of personal phone directories, messages, roaming across
networks at home and abroad and a host of value-added voice and
data services. For instance end-users are able to instantly
access news, games, chat & dating services and mobile payment
applications through an easy to use interface provided by the
SIM. This is independent of the type of handset used allowing
operators to reach all of their customers. Operator-centric
services such as call completion and automatic handset
configuration help them reduce their customer service costs and
raise their Average Revenue per User (ARPU).
The SIM is the final link in the chain from the network to the
end-user which means that no customer can be connected to the
network without their SIM. Network operators are able to
communicate with, download applications to, and manage a SIM
card remotely using Over-the-Air (OTA) technology. For example,
network operators are able to update the SIM cards dynamically,
providing new applications and new services without requiring
users to upgrade their handsets or visit a shop.
Gemplus SIM cards provide interoperability and compliance with
the latest standards to ensure that our SIM cards can be used in
any mobile phone and connect to networks across the globe.
Gemplus also provides devices, software and systems to manage
everything from a single user's SIM card through an operator's
entire fleet of SIM cards.
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