![]() ![]() While obtaining this information from a locked iPhone can be challenging, various methods are available to forensic investigators, including iPhone Diagnostic Mode, Recovery Mode, and DFU Mode. The IMEI, MEID, MAC address, and serial number of the device are crucial pieces of information that can aid forensic investigations in understanding an iPhone’s history, ownership, and involvement in criminal activities. Read more about information available in DFU mode and steps to enter DFU on various Apple devices: DFU does not return iOS version number however, iBoot version number is available through DFU, which allows guesstimating iOS version number. Serial number and IMEI number are never available in DFU. The DFU mode returns even less information compared to the Recovery mode, and significantly less information than Diagnostic mode. As a result, entering DFU mode can be difficult even for experts, especially if the device has one or more buttons broken. This mode lacks proper documentation, and requires precise timing for every step (otherwise the device will simply reboot). Unlike Recovery, DFU mode was never intended for general use. The True Meaning of iOS Recovery, DFU and SOS Modes for Mobile Forensics The ECID (Exclusive Chip Identification) or Unique Chip ID is an identifier unique to every unit, or more accurately, to every SoC. Device model: two representations of the device model, e.g. ![]() In particular, the following data is available: In particular, iBoot/Recovery mode allows connecting the device to the computer even if USB data transfers are disabled, the device is locked, or the screen lock passcode is unknown.Ĭompared to Diagnostic Mode, Recovery provides even less information about the device. As iBoot does not load iOS, it also does not carry many iOS restrictions. iBoot responds to a limited number of commands, and can return some limited information about the device. iBoot can be used to flash the device with a new OS. The Recovery mode, also known as “second-stage loader”, boots the device in iBoot (bootloader) mode. In iOS, Recovery is a failsafe method for recovering devices if they become unresponsive.
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