The Nokia Software Recovery Tool is the main tool you should use for flashing Nokia devices. Here are some details regarding it:

Tool for Nokia Software Recovery

• Designed with the intention of flashing and recovering Nokia smartphones—especially those powered by Android and Windows Phone.
  
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• Features:
• Resets the gadget to its original configuration.
  Installs the most recent version of the device's firmware.
  Helps in the recovery of non-responsive or software-problematic devices.
  
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Additional Tools

• Nokia OST (Online Service Tool): For service centers to flash firmware on Nokia devices.
• Nokia Phoenix Service Software: A more advanced tool for service professionals, useful for older Nokia models.
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Important Notes

• Ensure you have the correct firmware for your specific Nokia model.
• Backup all important data, as flashing can erase everything on the device.
• Keep your device charged during the flashing process to prevent interruptions.
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Always follow specific instructions or guides for your device model for the best outcomes!