ZTE apparently uses the ‘devinfo’ partition to store crucial bootloader state parameters, including the lock/unlock status. Based on this principle as well as the previous research work done by the Aleph Security team, XDA Senior Member alexenferman has now discovered a generic method to unlock the bootloader of a bunch of ZTE phones without any data loss. Interestingly, EDL is often utilized by tinkerers to get low-level partition access, which can further be exploited to achieve bootloader unlock on some devices. ![]() The latter is strictly intended for OEM servicing and can be used to ‘unbrick’ a device with appropriate software binaries via a protocol named ‘Firehose’. ![]() ![]() The regular boot sequence of a typical Qualcomm Snapdragon chipset-powered Android device is initiated with the Primary Boot loader (PBL), although there exists an alternative boot mode called Emergency Down load Mode (EDL).
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