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  2. Personal unblocking key - Wikipedia

    en.wikipedia.org/wiki/Personal_unblocking_key

    If the wrong PIN is entered more than three times, the SIM card will become locked. It can be unlocked by entering the PUK code provided by the mobile service provider, [1] which may be available on the SIM card's packaging, the contract, or provided by customer service after identity verification. After the PUK code is entered, the PIN must be ...

  3. SIM lock - Wikipedia

    en.wikipedia.org/wiki/SIM_lock

    This is in contrast to a phone (retrospectively called SIM-free or unlocked) that does not impose any SIM restrictions. Generally phones can be locked to accept only SIM cards with certain International Mobile Subscriber Identities (IMSIs); IMSIs may be restricted by: Mobile country code (MCC; e.g., will only work with SIM issued in one country)

  4. Fixed Dialing Number - Wikipedia

    en.wikipedia.org/wiki/Fixed_dialing_number

    Fixed Dialing Number (FDN) is a service mode of a GSM mobile phone's SIM card. [1] Numbers are added to the FDN list, and when activated, FDN restricts outgoing calls to only those numbers listed, or to numbers with certain prefixes. [1] A notable exception is that emergency calls to 000, 112, 911, 999 and the like are exempt. [2]

  5. Mobile number portability - Wikipedia

    en.wikipedia.org/wiki/Mobile_number_portability

    sim card of the new mobile company that will cost around 15 PEN. United States: 2003.11.24 0 Free iconectiv manages the Number Portability Administration Center (NPAC), the largest number portability system in the world. Consisting of seven regional systems, the NPAC facilitates number porting across all Service Providers in the United States.

  6. Regional lockout - Wikipedia

    en.wikipedia.org/wiki/Regional_lockout

    If the phone/tablet was purchased in any of these countries and the SIM card is from a different region, they cannot be used together. Although the restriction can be removed after using a local SIM card to make a call for at least five minutes, it only removes the restrictions for that particular country.

  7. Mobile country code - Wikipedia

    en.wikipedia.org/wiki/Mobile_country_code

    The mobile country code consists of three decimal digits and the mobile network code consists of two or three decimal digits (for example: MNC of 001 is not the same as MNC of 01). The first digit of the mobile country code identifies the geographic region as follows (the digits 1 and 8 are not used): 0: Test networks; 2: Europe

  8. 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 ...

  9. Mobile network codes in ITU region 2xx (Europe) - Wikipedia

    en.wikipedia.org/wiki/Mobile_network_codes_in...

    This list contains the mobile country codes (MCC) and mobile network codes (MNC) for networks with country codes between 200 and 299, inclusive. This range covers Europe, as well as: the Asian parts of the Russian Federation and Turkey; Georgia; Armenia; Greenland; the Azores and Madeira as parts of Portugal; and the Canary Islands as part of Spain.