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For deep repairs that require wiping EFS, an "Engineering ROM" might be needed to enable diagnostic ports. General Repair Steps (Professional Use) Enable Diag Port: Use a tool like DTpro Tool or a code like *#*#717717#*#* to open the diagnostic port for communication with your PC. Backup/Wipe EFS:

Follow these precise steps to wipe the corrupt data block and flash a healthy network calibration file. Step 1: Enable USB Debugging & Developer Mode redmi note 11 464 4g xqcn qcn efs file hot free do