B311 221 Firmware [upd] May 2026

It sounds like you're referring to for a Brother MFC‑B311 (likely a typo for B311) or a similar model, and you need to print on solid paper (e.g., plain paper, not specialty media).

Would you like a direct link to Brother’s firmware for a specific model, or help adjusting the “paper type” setting for solid/plain paper? b311 221 firmware