C. QCN / EFS restore (tools like QPST for Qualcomm equivalent — for MTK use tool-supported QCN)

Download, extract, and run the as an Administrator.

This guide and these tools must strictly be used for repair purposes to recover a legitimately purchased device from a corrupted software state. If you want to troubleshoot a specific device, let me know: The exact brand and model of the feature phone The specific error message you see on the screen Which Windows operating system version you are using

UFi Box Mobile phone EMMC user data service tool for Samsung UFI box

Set the connection type to or COM , depending on your specific phone platform.

Changing an IMEI to anything other than the original number printed on the phone's sticker or box is in many jurisdictions. These tools should only be used to a device to its original factory state.

: Consider integrating with other common tools used in mobile repair shops, such as device flash tools.