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After the PUK code is entered, the PIN must be reset. If the wrong PUK is entered ten times in a row, the SIM card will become permanently blocked and unrecoverable, requiring a replacement. Mobile phone users are therefore advised by most providers to keep their PUK written down in a safe place separate from the device.
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.
Relocking device in a safe Relocking device A relocking device (RLD) (a.k.a. "external relocker") is an auxiliary locking device intended to be activated during an attempted burglary of a safe or vault. Such a device will keep a safe or vault locked even if the primary lock is defeated.
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The touch screen, called the “Freedom Case,” allows customers to use their cell phone number, a retailer’s app, or a store loyalty card to unlock a display case and access locked merchandise.
The key contains a power supply device, usually a rechargeable battery or a replaceable battery in the key, used to drive the system to work; it also includes an electronic storage and control device for storing the identification code of the lock. The software is used to set and modify the data of each key and lock. [2]
In some cases, soft bricked devices are unable to be repaired without physical repairs being carried out; an example of this would be an iOS device locked with iCloud Activation Lock, of which the only solution is to contact the owner of the iCloud account the device is locked to, or to replace the entire logicboard with a non-locked board ...
HTC phones have an additional layer of lock called "S-OFF/S-ON". Bootloaders can be unlocked using an exploit or using a way that the vendor supplied. The latter method usually requires wiping all data on the device. [17] In addition, some manufacturers prohibit unlocking on carrier locked phones.