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  • Create a Zebra Account (You MUST create a Zebra Account otherwise it's not possible to download the latest firmware file).
  • Create Zebra Account



Download the latest Zebra Firmware Tool (ZDownlaoder) and install the tool: 


  • Run zDownloader installation file.
  • Click Next.


  • Accept terms. 
  • Click Next.


  • Click Next


  • Installation has started.


  • Installation is successfully completed. 
  • Click Finish

  • Run FirmwareDownloader. 
  • Click Printer → Auto-Detect.



  • You must allow FirmwareDownloader in Windows Firewall, click Permit access


  • Locate the correct printer (GK420T/GX430T).



  • Click File → Select Firmware File...



  • Browse to the firmware file location.
  • Select file → Click Open (now the FirmwareDownloader will work with the file - be patience). 



  • Now the firmware file has been uploaded to ZDownloader and are ready to be downloaded to the printer. 



  • Click Printer → Download To Selected 



  • Download has started.



  • When Download Status is blank the firmware has been downloaded to the printer. 
  • Firmware update is complete.