Xfinity shows a self-owned modem offline even while internet works
A Comcast modem was replaced with a self-owned UniFi modem in a rack, and the internet connection worked normally for several weeks afterward. The modem was activated through the Xfinity app by entering its and completing the setup flow.
Speed and latency were satisfactory, but the Xfinity app and portal kept showing the equipment as offline. Repeating activation and running the troubleshooting steps did not fix the status.
Some sites, especially remote work servers, sometimes returned an saying the Xfinity internet service was not activated. The same offline status appeared in the Xfinity portal from a phone outside the home network, so the issue appears to be a mismatch inside Xfinity’s system rather than a local device or malware problem.
Key points
- A Comcast-provided modem was replaced with a self-owned UniFi modem.
- The modem was activated in the Xfinity app with its , and internet service worked for weeks.
- Xfinity’s app and portal still showed the modem as offline.
- and troubleshooting steps did not correct the status.
- Some remote work sites sometimes returned an saying the internet was not activated.