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2. (U)SIM interface - Wikipedia

   en.wikipedia.org/wiki/(U)SIM_Interface

   Standardisation of the (U)SIM interface. The UICC with the SIM or USIM application plays an important role in mobile telephony as it is the secure element identifying a subscriber in the network and allowing MNOs to bill the respective account. Hence it is crucial to have standardised features e.g. placing phone calls or sending SMS working ...

3. Universal integrated circuit card - Wikipedia

   en.wikipedia.org/wiki/Universal_integrated...

   Universal integrated circuit card. The universal integrated circuit card ( UICC) is the smart card ( integrated circuit card) used in mobile terminals in 2G ( GSM ), 3G ( UMTS ), 4G ( LTE ), and 5G networks. The UICC ensures the integrity and security of all kinds of personal data, and it typically holds a few hundred kilobytes.

4. SIM Application Toolkit - Wikipedia

   en.wikipedia.org/wiki/SIM_Application_Toolkit

   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 ...

5. SIM card - Wikipedia

   en.wikipedia.org/wiki/SIM_card

   SIM cards are identified on their individual operator networks by a unique international mobile subscriber identity (IMSI). Mobile network operators connect mobile phone calls and communicate with their market SIM cards using their IMSIs. The format is: The first three digits represent the Mobile country code (MCC).

6. UMTS security - Wikipedia

   en.wikipedia.org/wiki/UMTS_security

   The Universal Mobile Telecommunications System ( UMTS) is one of the new ‘third generation’ 3G mobile cellular communication systems. UMTS builds on the success of the ‘second generation’ GSM system. One of the factors in the success of GSM has been its security features. New services introduced in UMTS require new security features to ...

7. Universiti Sains Islam Malaysia - Wikipedia

   en.wikipedia.org/wiki/Universiti_Sains_Islam...

   www .usim .edu .my. Universiti Sains Islam Malaysia ( lit. 'Islamic Science University of Malaysia'; Arabic: جامعة العلوم الإسلامية الماليزية; abbreviated as USIM) is an Islamic university in Nilai, Seremban, Negeri Sembilan, which is fully owned and funded by the Malaysian government. Being the 12th Public ...