Technical specifications

Interface details

  • Integration into the LTE broadband network with LTE-SIM card (mini SIM)
  • Internet connection via UMTS/HSPA+ (3G)
  • 1 x gigabit LAN (10/100/1000 Base T, RJ45 port) for PC, game console, network
  • Wireless N access point (IEEE 802.11n, g in the 2.4-GHz band) for PC, notebook, tablet, smartphone


  • LTE category 4 modem (FDD)
  • Multi-band support: LTE 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 32 (1.5 GHz) / LTE TDD band 38 (2,6 GHz), band 40 (2,3 GHz), band 41 (2,5 GHz)
  • Supports the 1.4, 3, 5, 10, 15 and 20 MHz channel bandwidths
  • MIMO receiver technology (Multiple-In-Multiple-Out antenna technology)
  • Integrated LTE antennas


  • LTE router with firewall/NAT, DHCP server, DynDNS client, UPnP AV
  • Stateful Packet Inspection Firewall with port forwarding for secure web surfing
  • Supports the IPv4 and IPv6 web protocol
  • Secure remote access, LAN-to-LAN linkup and dial-in to the company network with VPN (WireGuard and IPSec)
  • Parental control with filter lists
  • Remote maintenance via https


  • Wireless radio networks compliant with 802.11n (up to 450 Mbit/s gross; 2.4 GHz; MIMO 3 x 3) and 802.11g
  • With Mesh WiFi you can combine several wireless access points into one intelligent system (FRITZ!OS 6.90 and later) Find out more at
  • Secure upon delivery with WPA2 encryption, WPA3/2 transition mode is also available
  • WLAN button (to switch wireless LAN on/off manually)
  • Wi-Fi Protected Setup (WPS) for safe wireless connections at the touch of a button or by entering a PIN
  • Wireless guest access – secure surfing for friends and visitors
  • Green AP mode for optimum performance at minimum power consumption


  • Clearly laid out user interface, for intuitive operation via web browser
  • User interface optimized for smartphones and tablets (responsive design) and available in multiple languages (DE, EN, ES, FR, IT and PL)
  • Alignment aid for antennas to find the ideal location for the FRITZ!Box
  • Free updates for new functions and security
  • Help function with full-text search
  • FRITZ!App WLAN for connecting to your router and information about your Wi-Fi

Package contents

  • FRITZ!Box 6820 LTE
  • Power adapter with 1.5-meter cable
  • 1.5-meter LAN cable
  • Quick guide

Device properties

  • Dimensions (W x H x D): 64 x 99 x 134 mm
  • Average power consumption: under 6 watts


  • 5-year manufacturer’s warranty

Article number

  • 20002907