Repairing a corrupted IMEI is a legitimate maintenance task. However, please be aware that changing an IMEI to a different number is illegal in many jurisdictions. Always use this tool responsibly to restore your own device to its original working state.
This usually means your drivers aren't installed correctly or the cable is faulty. Try a different USB port.
Spreadtrum IMEI Tool v4.1 Patched: The Ultimate Guide to Device Restoration
Easily write IMEI 1 and IMEI 2 simultaneously.
Double-check that you haven't typed 14 or 16 digits; an IMEI must be exactly 15 digits. Safety and Ethics