iPhone Glossary for Unlockers

Firmware – The operating system on the device that can be changed through down-loadable updates

Jailbreak – The process by which a device is modified to allow unsigned code to be run

Unlock – The removal of SIM restrictions on the modem, allowing the use of the phone on any carrier

Baseband – Software that loads either the base-band or operating system into memory before execution

Bootloader – Software that loads either the base-band or operating system into memory before execution

Recovery mode – A special mode in the device allowing firmware restoration; in this mode, the screen of the device shows a graphic

DFU mode – A special mode in the device that bypasses the loading of the operating system for recovery purposes; in this mode, the screen of the device is blank

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