Most Nokia 105 models use SPD (Spreadtrum) chipsets, so you'll likely need a tool like the SPD Upgrade Tool or Infinity-Box CM2 .
: Using the wrong flash file (e.g., using a file for the TA-1010 on a TA-1304) can "brick" the device, rendering it permanently unusable. Always verify the model number by checking the sticker under the battery before proceeding. How To Do Hard Reset in Nokia 105 - Factory Reset Nokia 105 Ta 1304 Flash File Download
If the phone is under warranty or works normally, do not flash. For unlocking, try master code methods instead of flashing. If you must flash, use antivirus on the downloaded file and verify its checksum against known community posts. Most Nokia 105 models use SPD (Spreadtrum) chipsets,