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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 4-8 ...
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, located in ...
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 ...
[119] [120] Today, many carriers either remove the SIM lock automatically after a certain period, or do it upon request, either for free or for a small fee. [121] iPhones bought from Apple are not SIM locked. [117] Many carriers also sell the iPhone unlocked when purchased outright rather than on a long-term contract.
Android Dev Phone. The Android Dev Phone (ADP) is a SIM -unlocked and bootloader unlocked Android device that is designed for advanced developers. While developers can use regular consumer devices purchased at retail to test and use their apps, some developers may choose not to use a retail device, preferring an unlocked or no-contract device.
Devices without a SIM card slot or eSIM capability usually do not have an IMEI code. [4] However, the IMEI only identifies the device and has no particular relationship to the subscriber. The phone identifies the subscriber by transmitting the International mobile subscriber identity (IMSI) number, which is stored on a SIM card that can, in ...
Not to be confused with bootloader unlocking, SIM unlocking, or iOS jailbreaking. Rooting[ 1 ] 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 ...
The displays have curved sides that slope over the horizontal edges of the device. Unlike previous Samsung phones, their front-facing cameras occupy a rounded cut-out near the top-right of the display, and both models use an ultrasonic in-screen fingerprint reader . [ 9 ]