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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 ...
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 ...
Rooting is the process by which users of Android devices can attain privileged control (known as root access) over various subsystems of the device, usually smartphones and tablets. Because Android is based on a modified version of the Linux kernel, rooting an Android device gives similar access to administrative ( superuser) permissions as on ...
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 ...
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.
The Unlocking Consumer Choice and Wireless Competition Act was introduced into the United States Senate on March 11, 2013 by Sen. Patrick J. Leahy (D, VT). [8] It was referred to the United States Senate Committee on the Judiciary. On July 15, 2014, the Senate voted to pass the bill with unanimous consent. [8]
A 25 × 15 mm Vodafone New Zealand SIM 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.
Subscriber Identity Module (SIM) A nano sim used in mobile phones. One of the key features of GSM is the Subscriber Identity Module, commonly known as a SIM card. The SIM is a detachable smart card containing a user's subscription information and phone book. This allows users to retain their information after switching handsets.