Hold the (usually the center OK button or the Up/Down keys) and connect the phone to the PC via USB.
Highly recommended for this model. It provides a dedicated module to read and write flash files directly to the SPD SC6531EFM CPU. nokia 105 ta-1174 flash tool download
Before flashing, install the :
are required for the computer to recognize the phone in flash mode Firmware (Flash File) : The specific TA-1174 flash file (often in Flashing Procedure Hold the (usually the center OK button or