The router will reboot. This takes 3-5 minutes.
The ZTE F460 is a classic piece of telecom hardware. Found in millions of homes and small offices, this GPON ONT/Modem-Router combo is known for its reliability. However, like any digital device, its performance, security, and stability depend heavily on its firmware.
The "P4T2H" suffix indicates ISP customizations. You generally need a firmware from the same ISP family.