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  2. 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 ...

  3. 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 ...

  4. SIM card - Wikipedia

    en.wikipedia.org/wiki/SIM_card

    A GPP-branded SIM interposer used to circumvent network restrictions on carrier-locked iPhones. A thin SIM (or overlay SIM or SIM overlay) is a very thin device shaped like a SIM card, approximately 120 microns (1 ⁄ 200 inch) thick. It has contacts on its front and back. It is used by placing it on top of a regular SIM card.

  5. SIM swap scam - Wikipedia

    en.wikipedia.org/wiki/SIM_swap_scam

    SIM swap scam. A SIM swap scam (also known as port-out scam, SIM splitting, [1] simjacking, and SIM swapping) [2] is a type of account takeover fraud that generally targets a weakness in two-factor authentication and two-step verification in which the second factor or step is a text message (SMS) or call placed to a mobile telephone.

  6. Subsidy Password - Wikipedia

    en.wikipedia.org/wiki/Subsidy_Password

    Subsidy Password. The term, Subsidy Password, is used by Motorola and other handset manufacturers to refer to the 8-digit code (or 16-digit code for phones such as the Motorola K1) unlock code necessary to remove the operator lock (also known as subsidy lock) from cell phones. This code is randomly assigned to individual cell phones by the OEM ...

  7. Turbo SIM - Wikipedia

    en.wikipedia.org/wiki/Turbo_SIM

    The most common purpose of the Turbo SIM is to spoof the IMSI number and authentication key (Ki) supplied by the SIM card to the network, allowing phones locked to use only a particular network such as the Apple iPhone, and more recently NTT DoCoMo and SoftBank phones, to be used on any mobile network with which they are technically compatible.

  8. 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 ...

  9. Roaming SIM - Wikipedia

    en.wikipedia.org/wiki/Roaming_SIM

    A roaming SIM is a mobile phone SIM card that operates on more than one network within its home country. Roaming SIMs currently have two main applications, the least cost call routing for roaming mobile calls and machine to machine. Using a normal network locked SIM, travelers can use their own roaming enabled mobile phone in any country that ...

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