Patched firmware is often built for a specific hardware revision (e.g., a specific board ID). Flashing firmware intended for a slightly different variant of the MC888 can lead to a mismatch. While the device might power on, it could suffer from a "soft brick," where the Wi-Fi works but the 5G modem fails to initialize, or the administrative interface becomes inaccessible.
Only proceed if you are an advanced user, have a backup router, and accept full responsibility. zte mc888 firmware patched