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To update your ZTE H2640 to the latest firmware version, follow these steps:

Open a web browser and enter the default gateway IP (usually 192.168.1.1

| Firmware Version | Release Period | Primary Changes | |----------------|----------------|------------------| | | March 2021 | Initial 2021 stable release; security patch level 2021-02 | | V1.0.0B08 | June 2021 | Band locking enhancement; improved IPv6 stack | | V1.0.0B11 | September 2021 | Wi-Fi stability fixes; added 5 GHz channel selection | | V1.0.0B13 | December 2021 | Security patches (CVE-2021-xxxxx); TR-069 improvements |