cat extracted_kernel.bin new_rootfs.squashfs > combined.bin

Are you trying to on your router, or are you just looking to fix a connection issue ? Why You Should Update Router Firmware Regularly

of any downloaded repack against a known good source. Scan the .bin with binwalk to ensure it doesn’t contain unexpected binaries.

Assume you have downloaded a file named zte_f671y_universal_repack.bin .

Protects against emerging threats and common web application vulnerabilities.