Technical specifications


  • Mini SIM slot (LTE 4G) category 4 modem)
  • IP-based telephony
  • 4 x gigabit LAN ports
  • Wireless access point compliant with IEEE 802.11ac, n, g, a
  • 1 x high-speed USB port for storage devices and printers
  • Integrated DECT base station for up to six cordless telephones
  • 1 a/b port (either TAE or RJ11) for an analog telephone, answering machine or fax

LTE (4G)

  • Wireless router with integrated LTE (4G) category 4 modem for FDD band 1 (2.1 GHz), band 3 (1.8 GHz), band 5 (850 MHz), band 7 (2.6 GHz), band 8 (900 MHz), band 20 (800 MHz) and band 28 (700 MHz)
  • Also for TDD band 38 (2.6 GHz), band 40 (2.3 GHz) and band 41 (2.5 GHz)
  • Internet access also via UMTS/HSPA+ (3G) with up to 42 Mbit/s
  • Option for connecting two outdoor antennas over SMA connectors


  • 4G LTE router with firewall/NAT, DHCP server, DynDNS client, UPnP AV
  • Optimized for streaming and Internet TV e.g. Disney+, Netflix etc.
  • Supports IPv6
  • Stateful Packet Inspection Firewall with port sharing
  • Secure remote access, LAN-to-LAN linkup and dial-in to the company network with VPN (WireGuard and IPSec)


  • Wi-Fi 5 (up to 866 Mbit/s gross, 5 GHz) and 4 (up to 400 Mbit/s gross, 2.4 GHz)
  • Compatible with Wireless 802.11g and a
  • Extends your home network with Mesh Wi-Fi – simply combine two or more wireless access points into one intelligent system. Find out more here
  • Dual Wi-Fi: Concurrent use of the 5-GHz and 2.4-GHz band
  • Secure upon delivery with WPA2 encryption, WPA3/2 transition mode is also available
  • AVM Stick & Surf: automatic security for cable-free surfing
  • WLAN button (switch Wi-Fi on/off manually)
  • Wi-Fi Protected Setup (WPS)
  • Wi-Fi guest access – secure surfing for friends and visitors
  • Wi-Fi auto channel: Automated search for Wi-Fi channel free of interference
  • Green AP mode for optimum performance at minimum power consumption


  • Telephone system for IP and mobile networks (VoLTE)
  • Integrated DECT base station for up to six cordless telephones
  • Voice transmission encrypted upon delivery
  • 1 a/b port (either TAE or RJ11) for an analog telephone, answering machine or fax
  • Supports HD telephony for natural sound
  • DECT Eco: Radio network switches off for maximum ergonomics
  • Five integrated answering machines including email forwarding (voice-to-mail)
  • Fax function including email forwarding (fax-to-mail)
  • Manage telephone contacts locally or online (Google, Apple etc.)
  • Call list, number blocking, quick-dial numbers, extensions
  • Dialing rules to tailor use of specific numbers
  • Call diversion, internal calls, three-way conferencing, call transfer
  • Alarm, baby monitor, VIP calls and Do not Disturb
  • Support for door intercom systems
  • Internet telephony SIP-compliant in accordance with RFC 3261
  • Registration of IP telephones (LAN/Wi-Fi) SIP-compliant
  • FRITZ!App Fon for landline calls via your smartphone

Home network convenience

  • Media server makes music, pictures and movies available to devices in the home network (DLNA/UPnP AV)
  • Secure access to your own FRITZ!Box from anywhere with MyFRITZ!
  • FRITZ!NAS – simple, browser-based access to all files in the network, wherever they are stored
  • Networked applications such as Internet TV, video on demand and streaming
  • Parental controls, push service, cloud contacts, online storage
  • Guest access: share your internet connection over LAN or Wi-Fi
  • Wake on LAN over the internet
  • Supports devices compliant with DLNA
  • Also supports online storage, web radio and podcasts
  • Sharing data with friends both simple and secure


  • "": multi-language user interface, for intuitive operation via Web browser
  • User interface optimized for smartphones and tablets (responsive design)
  • Free updates for new functions and security
  • Handy FRITZ!Apps for your smartphone: MyFRITZ!App for FRITZ! convenience on the go, the clever Wi-Fi helper FRITZ!App WLAN and FRITZ!App Smart Home for intuitive control of your FRITZ! Smart Home
  • Help function with full-text search
  • Smart Home features integrated in the user interface
  • Smart Home support for DECT ULE/HAN FUN devices
  • Smart Home devices can be switched manually and automatically both in the home network and from the Internet

Package Contents

  • FRITZ!Box 6850 LTE
  • Power adapter
  • External LTE antennas
  • 1.5 meter-long LAN cable
  • Quick guide

Device Properties

  • Dimensions (W x H x D): 200 x 45 x 152 mm
  • Wall mount or place on any surface e.g. a table or shelf
  • Average power consumption: 6 watts


  • 5-year manufacturer’s warranty for end customers, as per the warranty conditions

Article number

  • 20002926