If you want, I can draft step-by-step instructions tailored to your firmware file name and current configuration—provide the firmware filename and whether your device is ISP-branded.
Since the is a GPON ONT (Optical Network Terminal) typically provided by ISPs (like Hathway), firmware updates are usually managed and pushed automatically by the provider. However, if you are looking to optimize your setup or share a guide with others, 🚀 Optimizing Your ZTE F602W: Firmware & Performance Tips Zte F602w Firmware BETTER
ZTE rarely releases public firmware for ONTs as they are "B2B" products. Always contact your ISP's support first to request a remote firmware push if you're experiencing drops. If you want, I can draft step-by-step instructions
New software often includes bug fixes for Wi-Fi drops or fiber optic signal processing. Always contact your ISP's support first to request
to select the firmware file you downloaded from your ISP or the ZTE official support site