For 99% of users: — They can restore your IMEI/EFS using factory tools for free or low cost if it’s a software corruption issue.

Allowing users to modify the IMEI numbers within a .qcn backup file to match the original hardware labels of a repaired device.

This requires a generic QCN file from a similar device model and editing with a hex editor. Not recommended for beginners.

Many "cracked" or "premium" versions of this tool are fake. The genuine V1.0 UPD is completely free. Never pay for it.

| Error Message | Cause | Solution | |---------------|-------|----------| | No device found | Drivers not installed / Wrong USB mode | Reinstall Qualcomm drivers. Dial *#0808# and choose "RMNET + DM + MODEM" | | Failed to write QCN | File corrupted or mismatch | Find exact firmware version match for your phone | | Port already in use | Another tool (QPST, Miracle Box) is running | Close all other flashing tools, reboot PC | | IMEI still null after write | NV items not refreshed | Factory reset from recovery OR write full stock firmware first | | Tool crashes on launch | Missing VC++ runtime | Install latest Visual C++ Redistributable |

— use at your own risk.