A stable connection is vital. A loose cable during the flashing process can "hard brick" the device, making it unrecoverable. Use the original Nokia USB cable or a high-quality data cable.
Even with the correct Nokia TA-1165 firmware PAC file, you may encounter these errors: nokia ta-1165 firmware pac file download
Open the SPD Upgrade Tool , click the Gear icon , and select your downloaded .PAC file . A stable connection is vital