Overview
- Fritz released FritzOS 8.20 for the Fritzbox 5690 (fiber) and 7690 (DSL), while the Fritzbox 6670 Cable receives version 8.21 as a targeted hotfix.
- The 8.2 family delivers more than 40 changes, highlighted by Failsafe for automatic fallback connectivity and an updated Online‑Monitor with two‑week traffic views and per‑device filters.
- Failsafe accepts backup links over WAN, LAN or USB, including smartphone USB tethering or mobile sticks, and Fritz recommends the Fritzbox 6850 5G or 6850 LTE as backup units.
- FritzOS 8.21 for the 6670 Cable focuses on cable‑specific fixes such as restoring missing IPv6 address visibility in the WireGuard connections overview.
- Updates arrive automatically if enabled or can be triggered in the web UI at 192.168.178.1, and ISO images are available as the broader 8.2 rollout continues across more models.