Once you are inside the admin dashboard (usually titled "ZLT 4G/5G CPE" or "ONU"), follow these steps to upgrade from "basic" to performance.

The ZLT S25 is a popular 4G LTE indoor router, often used in regions with expanding wireless infrastructure. While it offers reliable connectivity, the "default login" credentials represent a critical intersection between user convenience and cybersecurity. The Out-of-the-Box Experience

Are you trying to or adjust 4G/5G signal settings? ZLT S25 WiFi Router User Manual