If you do not want to manually check for every month, enable the TR-069 auto-provisioning feature:
: Some ISP-branded versions (like Three UK) may trigger an automatic update only after a compatible SIM card is inserted. for your router's region or carrier? zte mc7010 firmware update free
What it shows (UI elements)
There are two primary methods to obtain and install the latest firmware: MC7010 - ZTE - Support If you do not want to manually check