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FRITZ! Box 6850 4G International Edition
4G LTE WiFi 5 AC1200 MU-MIMO Modem/Router + 4 Gigabit Ethernet LAN ports and 1 SIM port
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a compact, high-performance 4G router ready to go wherever you are
Enjoy fast and reliable Internet access, even without fiber or ADSL, thanks to the FRITZ! Box 6850 4G. This high-performance LTE router takes a SIM card to provide mobile Internet access up to 300 Mbit/s download speed. A true communications hub for home or small offices, it combines a high-performance dual-band Wi-Fi 5 network, a FRITZ! Mesh system to easily extend wireless coverage, an integrated DECT base for telephony, as well as many advanced security functions such as firewall, WireGuard/IPSec VPN, WPA3 encryption and parental controls. Thanks to its four Gigabit Ethernet ports, IPv6 compatibility, Smart Home functions and its particularly intuitive FRITZ! OS interface, the FRITZ! Box 6850 4G is a complete solution for benefiting from a high-performance, secure and scalable network, both in a main or secondary residence and in a professional environment.
Technical specifications:
- Wi-Fi router with integrated 4G/3G modem
- 4G LTE mobile Internet connection up to 300 Mbit/s
- Compatible with LTE Advanced Category 6 (3GPP Release 10)
- 3G UMTS/HSPA+ compatibility
- Mini-SIM slot
- Carrier Aggregation up to 2CC
- 2x2 MIMO support on all LTE bands
- LTE bands: B1, B3, B5, B7, B8, B20, B28, B32, B38, B40 and B41
- UMTS bands: B1, B5 and B8
- Wi-Fi 5 (IEEE 802.11a/b/g/n/ac)
- Wi-Fi speed up to 866 Mbit/s on 5 GHz
- Wi-Fi speed up to 400 Mbit/s on 2.4 GHz
- Integrated FRITZ! Mesh technology
- WPA3/WPA2 Wi-Fi encryption
- Guest Wi-Fi network
- Wi-Fi activation/deactivation by button or scheduled timer
- 4 Gigabit Ethernet ports (10/100/1000 Base-T)
- Stateful Packet Inspection firewall
- Port forwarding
- Full IPv6 compatibility
- IPSec and WireGuard secure VPN
- Security assistant and automatic updates
- Parental controls with time slots, allowlists and blocklists
- Integrated DECT base
- Connection of up to 6 DECT cordless phones
- Registration of up to 10 IP phones (SIP)
- VoLTE and SIP telephony (RFC 3261)
- Support for SIP TLS and SRTP
- Up to 5 integrated answering machines
- Integrated fax with fax-to-email function
- Call management: transfer, three-way conference, call forwarding, filtering, do not disturb mode, baby monitor, VIP calls, caller ID
- Compatible with DECT or IP/SIP door intercoms
- FRITZ!App Fon app for Android smartphones and iPhone
- Compatible with FRITZ! Smart Home: up to 10 connected FRITZ!DECT 200/210 sockets / up to 10 FRITZ!DECT 440 switches / up to 12 FRITZ!DECT 300/301 thermostats / support for compatible HAN FUN devices
- LTE antenna orientation assistance
- FRITZ! OS user interface with simplified setup and regular updates.
- FRITZ! Box 6850 4G
- External 4G antennas
- Ethernet cable (1.5 m)
- Power supply unit
- Installation guide
Select your criteria
General information |
Product name |
FRITZ! Box 6850 4G International Edition |
Brand |
Fritz! | |
Model |
20003085 | |
Router |
Modem/Router type |
Wi-Fi Modem Router |
Network standard(s) |
Wi-Fi AC | |
| 10/100/1000 Mbps | ||
| Wi-Fi AC 1200 Mbps (IEEE 802.11ac) | ||
| Wi-Fi AC 867 Mbps (IEEE 802.11ac) | ||
| Wi-Fi N 300 Mbps (IEEE 802.11n) | ||
| 3G (UMTS HSDPA) | ||
| 3G (UMTS HSPA) | ||
| 3G (UMTS HSUPA) | ||
| 3G (UMTS W-CDMA) | ||
| 4G (LTE) | ||
Wireless |
No | |
Mesh Wi-Fi (mesh/multiroom network) |
Yes | |
Dual-Band |
Yes | |
IPv6 compatible |
Yes | |
Network connector(s) |
4 X LAN - Gigabit Ethernet - RJ45 | |
Modem |
Integrated Modem |
Yes |
Interface with the computer |
Ethernet - RJ45 Female | |
| Wi-Fi | ||
Physical characteristics |
Length |
200 mm |
Width |
152 mm | |
Height |
45 mm | |
Warranties |
Commercial warranty |
Seller 2 years
|
Legal warranty |
See terms & conditions
|
See all Fritz! products
Product referenced on 10 Jul 2026
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