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2. Personal unblocking key - Wikipedia

   en.wikipedia.org/wiki/Personal_unblocking_key

   A personal unblocking key ( PUK ), sometimes called personal unblocking code ( PUC ), is used in SIM cards to reset a personal identification number (PIN) that has been lost or forgotten. Most mobile phones offer the feature of PIN protection. After switching on the phone, if the PIN security function is active, the user is required to enter a ...

3. 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. This is in contrast to a phone (retrospectively called SIM-free or ...

4. Turbo SIM - Wikipedia

   en.wikipedia.org/wiki/Turbo_SIM

   Turbo SIM. Turbo SIM card (also known as TurboSIM or Unlock Chip) is considered to be the forerunner of a large family of "Dual SIM" devices (X-SIM, R-SIM, HyperCard, HyperSIM, China3GPP, StealthSim, MagicSIM, etc.) that piggyback on a mobile telephone SIM card to alter its normal operation. It was introduced on December 1, 2004 by BLADOX ...

5. Mobile network codes in ITU region 3xx (North America)

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

   Free: Free Caraïbe: Not operational: UMTS 900 / UMTS 2100 / LTE 800 / LTE 1800 / LTE 2600: MNC withdrawn: 340: 08: Dauphin: Dauphin Telecom: Operational: GSM 900 / GSM 1800 / UMTS / LTE: Saint Barthélemy, Saint Martin: 340: 09: Free: Free Caraïbe: Upcoming: UMTS 900 / UMTS 2100 / LTE 800 / LTE 1800 / LTE 2600: 340: 10: SRIR: SOCIETE DE ...

6. 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 ...

7. International Mobile Equipment Identity - Wikipedia

   en.wikipedia.org/wiki/International_Mobile...

   The International Mobile Equipment Identity ( IMEI) [1] is a numeric identifier, usually unique, [2] [3] for 3GPP and iDEN mobile phones, as well as some satellite phones. It is usually found printed inside the battery compartment of the phone but can also be displayed on-screen on most phones by entering the MMI Supplementary Service code *#06 ...