1. Dose the CGN3U update the firmware automatically?
2. What is the latest firmware updates number for this modem?
3. If I dont have the latest firmware how do I update it to the most recent?
Welcome to our community
Yes, the CGN3U does receive the updates automatically and the latest firmware is 18.104.22.168T2 as of September 2020.
You can see the version you're on when plugging your IP into your browser.
Hope this helps!