AVM FRITZ!Box 6670 Cable Modem router: Prices and Specs

Overview

The FRITZ!Box 6670 Cable is a combined cable modem and router from AVM, built around a Wi-Fi 7 dual-band radio setup (2.4 + 5 GHz, no 6 GHz). It includes a built-in DOCSIS 3.1 cable modem rated up to 6 Gbit/s, 5 Ethernet ports with 2.5 Gbps max speed, and support for DECT ULE and Zigbee smart home devices.

Who it suits

This router suits households on cable internet who want a single box handling modem, Wi-Fi 7 routing, and smart home connectivity via Zigbee or DECT ULE. It fits users who rely on wired devices needing above-gigabit speeds, given the 2.5 Gbps Ethernet ports and 5-port count.

Reasons to consider it

The built-in DOCSIS 3.1 modem removes the need for a separate modem on cable connections. Five Ethernet ports with 2.5 Gbps support allow multiple wired devices to run faster than standard gigabit. Zigbee and DECT ULE support let it double as a smart home hub, and wired backhaul support allows it to anchor a FRITZ! Mesh setup.

Limitations and compatibility checks

There is no 6 GHz band, so it only covers 2.4 and 5 GHz despite being Wi-Fi 7 capable. It has a single USB port and no PoE, and mesh expansion is tied to AVM's own FRITZ! Mesh ecosystem rather than third-party mesh systems.

Verified specifications

Manufacturer specifications

FAQs

Does this router have a 6 GHz band?

No, it is dual-band only, covering 2.4 GHz and 5 GHz.

Can I use it as my only modem on a cable connection?

Yes, it has a built-in DOCSIS 3.1 cable modem rated up to 6 Gbit/s.

Will it mesh with routers from other brands?

It uses AVM's FRITZ! Mesh ecosystem, which is designed for AVM's own devices.