Worked initially on my Epson WF-3820 but after performing a printer update that needed to be done, the relatively new cartridge (only used a few times) unfortunately did not work any more, with a message showing "Cannot recognize ink cartridge. Try installing again."

Reply by our customer service

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Epson has updated their firmware to no longer recognize these cartridges. If you haven't updated your firmware, you should be ok. If you did, these will not work, and there is no firmware roll back. I've been down that rabbit hole. Epson know EXACTLY what they are doing, so now you know too. This is NOT Shopper+ fault, so I don't blame them in this. But they should at least make buyers aware of the issue, or just stop selling these units.

Reply by our customer service

Hello, thank you for your feedback and your advice. Kindly be informed that we have taken a note on the website page: Please do not upgrade your printer firmware to avoid cartridges not being recognized and also turn the printer auto-update off. If you have any questions, please feel free to contact us by email (support@shopperplus.com), by chat or by calling us: at 1-866-979-7463