The Zyxel NR5103E usually updates on its own when the ISP pushes new firmware. Ensure your router is connected to the internet. Leave it powered on overnight.
Updating your Zyxel NR5103E 5G router Go to product viewer dialog for this item. zyxel nr5103e firmware update 39link39
While ISPs often control the rollout, you can check for and attempt updates through the device's web interface: The Zyxel NR5103E usually updates on its own
Always connect your computer to the router via an Ethernet cable. Never update firmware over Wi-Fi. zyxel nr5103e firmware update 39link39
Zyxel has announced a major update for the NR5103E in Q3 2025, focusing on: