Do you plan to connect via or Direct ISP hardware ?
Once you check all boxes, you are ready to tackle dead boot repairs, eMMC replacements, and low-level data recovery.
Windows 7, 8, 8.1, 10, or 11 (64-bit recommended). Do you plan to connect via or Direct ISP hardware
| Problem | Possible Solution | | :--- | :--- | | | Reinstall the Qualcomm or Mediatek USB drivers. Ensure you are using a USB 2.0 port, not 3.0. | | GRT Tool crashes on launch | Extract the archive to a folder that does not contain spaces or special characters (e.g., C:\GRT ). Run as Administrator. | | "Sahara Protocol Error" | This usually indicates a bad USB cable or loose TP connection. Try a different cable or resolder the ISP points. It can also mean the Firehose loader is incorrect for the device. | | Antivirus deletes the .exe file | This is common for cracked tools. Restore the file from quarantine and add the entire GRT folder to the Antivirus exclusion list. | | "eMMC Write Failed at Offset 0x..." | The eMMC sector is likely corrupted or dying. If wiping or reflashing doesn't work, the physical chip may need replacement. |
Mobile repair utilities often execute deep partition writes that can trigger false positives in security software. | Problem | Possible Solution | | :---
Before downloading and installing the tool, ensure your workspace meets the following technical requirements to avoid errors:
Run and install the , MediaTek (MTK) USB VCOM Driver , and Spreadtrum (SPD) Drivers depending on your target device. Restart your computer to finalize the driver integration. Step 4: Run the Executable Navigate back to the main extracted folder. Right-click GRT_EMMC_Tool_V10.exe . Run as Administrator
Before erasing, always backup the EFS partition (usually partition 13-15). GRT lets you extract it as a .bin file. This saves you from losing IMEI or network locks.
Once the tool opens, you can test the connection. The instructions from the download source suggest a workflow: . This scanning function should confirm that the software can communicate with the connected hardware.
| Error Message | Cause | Solution | |---------------|-------|----------| | "FTDI device not found" | Missing or wrong driver | Install FTDI CDM driver v2.12.36.4 | | "Failed to allocate memory" | 32-bit Windows | Switch to 64-bit Windows; enable PAE | | "CRC mismatch on block 0" | Bad ISP connection | Re-solder ISP points; shorten wires | | "Tool crashes on partition scan" | Corrupted config file | Delete settings.ini and relaunch | | "License error #0x0001" | Date check bypass | Run with --no-date-check parameter (if supported) |
: Right-click the GRT_eMMC_Tool.exe file and select "Run as Administrator" to ensure the software has the necessary permissions to communicate with external hardware.