Tag Archives: Key firmware Epson XP-520

How To Downgrade Firmware Epson XP-520

Why Use Epson XP-520 Firmware Key – Epson XP-520 downgrade firmware key: this is required when NON-ORIGINAL ink cartridges are NOT recognized by the printer. This is because printers’ firmware has been updated from the Epson server to the newest firmware where not original ink cartridges are forbidden to be …

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