Posted October 14, 2021. I made a downgrade from the FW_YL246L6 firmware and installed european version (downloaded from EPSON GB) 2Manuals.com

Complete Guide to XP-7100 Chipless Firmware: Modify Your Printer

: The printer reports "full" ink levels indefinitely and continues to print even if no chip is detected. This allows users to utilize third-party inks, refillable cartridges, or Continuous Ink Supply Systems (CISS) without the printer "blocking" them for being non-genuine.

Have you installed chipless firmware on your XP-7100? Share your experience in the comments below. And remember: always keep a spare set of cartridges before you flash.

Significantly reduces the cost per page by allowing the use of bulk ink.