Flashing unauthorized firmware can brick your device, violate your ISP's terms of service, and void your warranty. Proceed at your own risk.
Do not power off the device during the 3–5 minute process. The ONT will reboot automatically. You will see the "PON" light flash green—this is normal. Zte F602w Firmware BETTER
A command: upgrade f602w_better.bin nand force Ensure Compatibility with Latest Software: Make sure the
V10.0.0.bin from a sketchy forum might fix Wi-Fi but kill your optical signal negotiation (RX power). The F602w is very sensitive to OMCI (management protocol) mismatches with the ISP's OLT.No verifiable evidence supports the safety or efficacy of “ZTE F602w Firmware BETTER.” Use at your own risk. Official firmware remains the only secure and supported option. A command: upgrade f602w_better