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  2. Universal integrated circuit card - Wikipedia

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

    In 2G networks, the SIM card and SIM application were bound together, so that "SIM card" could mean the physical card, or any physical card with the SIM application. In a GSM network, the UICC contains a SIM application and in a UMTS network, it contains a USIM application. A UICC may contain several applications, making it possible for the ...

  3. Type Allocation Code - Wikipedia

    en.wikipedia.org/wiki/Type_Allocation_Code

    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.

  4. Removable User Identity Module - Wikipedia

    en.wikipedia.org/wiki/Removable_User_Identity_Module

    The card also contains SIM (GSM) application, so it can work on both networks. It is physically compatible with GSM SIMs and can fit into existing GSM phones as it is an extension of the GSM 11.11 standard. [1] This interface brings one of the main advantages of GSM to CDMA network phones. By having a removable identity card, CDMA users can ...

  5. 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 ...

  6. SIM lock - Wikipedia

    en.wikipedia.org/wiki/SIM_lock

    A SIM lock, simlock, network lock, carrier lock or (master) subsidy lock is a technical restriction built into GSM and CDMA [1] mobile phones by mobile phone manufacturers for use by service providers to restrict the use of these phones to specific countries and/or networks.

  7. Mobile phone feature - Wikipedia

    en.wikipedia.org/wiki/Mobile_phone_feature

    Tri-band means 850 / 1800 / 1900 MHz or 900 / 1800 / 1900 MHz. Quad-band means 850 / 900 / 1800 / 1900 MHz, also called a world phone, since it can work on any GSM network. Multi-band phones have been valuable to enable roaming whereas multi-mode phones helped to introduce WCDMA features without customers having to give up the wide coverage of GSM.

  8. List of Google Play edition devices - Wikipedia

    en.wikipedia.org/wiki/List_of_Google_Play...

    The Google Play edition devices (GPE) is a series of consumer mobile devices sanctioned by Google that run the Android operating system. Unlike the standard versions of Android on these devices, which have received "skins" from the original equipment manufacturer, such as Samsung One UI or HTC Sense, they run a "stock" version of Android, [1] without any manufacturer or wireless carrier ...

  9. SIM card - Wikipedia

    en.wikipedia.org/wiki/SIM_card

    Mostly, GSM and 3G mobile handsets can easily be unlocked and used on any suitable network with any SIM card. In countries where the phones are not subsidised, e.g., India, Israel and Belgium, all phones are unlocked. Where the phone is not locked to its SIM card, the users can easily switch networks by simply replacing the SIM card of one ...