MRT Key (Mobile Repair Tool) version 3.77 was a significant update released in early 2021 for the popular hardware dongle used to service and unlock Android smartphones. Key Features of MRT Ver 3.77

MTK and Qualcomm Support: The software offered robust support for devices using MediaTek (MTK) and Qualcomm processors. This included reading info, flashing firmware, and repairing IMEI numbers where legally permitted. User Interface and Experience

Flashing & Bootloader:

Support for unlocking or relocking bootloaders and flashing firmware.

Note

Xiaomi / Redmi:

Unlock passwords and remove Mi accounts without needing specialized Mi Flash tools for every model.

Software Availability:

Official updates have largely ceased. While you can still find downloads for the MRT Key v3.95 Main Setup via community archives, the original development team is no longer active.

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