Use a serial terminal to send AT commands to initiate the update:
Complete control over firewall rules, advanced VPN integration (WireGuard/OpenVPN), network storage setups, and precise band-locking tools. zte mf286d firmware
The correct ZTE MF286D OpenWrt firmware files (initramfs-kernel and sysupgrade images) from the official OpenWrt firmware selector website. Use a serial terminal to send AT commands
To help narrow down the exact files or steps you need next, please let me know: advanced VPN integration (WireGuard/OpenVPN)
sysupgrade -n /tmp/openwrt-ipq40xx-generic-zte_mf286d-squashfs-sysupgrade.bin