Hydra Tool software, version 2023.12.9.0, packed as an 11.5 MB ZIP archive. Hydra Tool is a service utility used by phone repair technicians, working together with its dongle, for tasks such as flashing firmware, reading device information and handling locks on supported Android chipsets. Keep the version in mind, since supported models and functions change between releases. Run it only on a dedicated service PC, check that drivers for the target device are installed, and back up the device data and partitions before any write operation.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @biosbin. Enginerys does not host this file.
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Compressed archive that every operating system opens without extra software.