How do i?

How do i do it is it possible?
Depending on the specific model, you can use it bridge mode.

Put sim card in phone and configure hotspot or if it's a modem, sambaza the inter to the zuku router (in bridge mode).

You can get a better WiFi range and ethernet connection via the Zuku router. I guess you will have to disconnect the coaxial cable.

Zuku routers have clanky and buggy old firmware (second hand from France) so... best of luck.

Report back if successful.