: Verify that your device is exactly a ZLT P21. Using firmware designed for a different model can permanently damage your router.
Before you begin the process, take these precautionary steps to ensure a smooth experience: zlt p21 firmware update install
: Updates can sometimes reset your router to factory defaults. Use the router's web interface to save a backup of your current configuration. : Verify that your device is exactly a ZLT P21
: While Wi-Fi can be used, using a wired Ethernet connection to your computer is highly recommended for a safer and faster procedure. Step-by-Step Installation Guide zlt p21 firmware update install
Log in with your admin username and password. These are typically found on a sticker underneath the router. How to Update Your Router's Firmware