FRITZ!Box 6820 LTE Service - Knowledge Base

FRITZ!Box 6820 LTE Service

Cannot access the Internet

Although the FRITZ!Box is configured to access the Internet via the mobile network, computers, smartphones, or other devices connected to it cannot access the Internet. One of the following error messages may be displayed in the event log of the FRITZ!Box:

  • "No LTE network was found within range."
  • "Could not establish LTE connection. Reason: ESM_FAILURE. Please check the APN settings."

Important:Some of the settings described here are only displayed if the advanced view is enabled in the user interface. The configuration procedure and notes on functions given in this guide refer to the latest FRITZ!OS

Simply proceed as described below. After each measure, check whether the issue persists.

1 Checking whether the "Power" LED flashes

2 Checking the event log of the FRITZ!Box

  1. Click "System" in the FRITZ!Box user interface.
  2. Click "Event Log" in the "System" menu.
  3. Select "Internet connection" from the drop-down list.
  4. Check whether error messages are displayed.
    • If the message "LTE no longer responding" is displayed frequently (several times a day):
    • If the message "Could not establish the LTE connection. Reason: ESM_FAILURE. Please check the APN settings." is displayed:
      1. Click "Account Information" in the "Internet" menu.
      2. Select your LTE provider from the drop-down list "Internet service provider". If your LTE provider is listed several times, select the entry that corresponds to your rate.
        • Only if your LTE provider is not displayed in the drop-down list:
          1. Select "Other Internet service provider" from the drop-down list.
          2. Enable the option "Specify access point name (APN)" and for "Access point" enter the access point name for your LTE provider.

            Note:Your LTE provider can provide you with information on the access point name.

      3. Click "Apply" to save the settings.

3 Enabling the FRITZ!Box's DHCP server

The FRITZ!Box is configured as a DHCP server in the factory settings. If you disabled the FRITZ!Box's DHCP server, configure the following settings:

  1. Click "Home Network" in the FRITZ!Box user interface.
  2. Click "Home Network Overview" in the "Home Network" menu.
  3. Click on the "Network Settings" tab.
  4. Click the "IPv4 Addresses" button.
  5. Enable the DHCP server and define the range from which the FRITZ!Box assigns IP addresses.

    Note:The FRITZ!Box has the IP address (subnet mask and assigns IP addresses from xxx.20 to xxx.200 in the factory settings.

  6. Click "OK" to save the settings.

4 Configuring a network device as a DHCP client

5 Configuring the Internet Explorer

Perform the following step only if you are using Microsoft Internet Explorer and it displays the message "Web page unavailable while offline":

  1. Start the Internet Explorer.
  2. Open the "Tools" menu.
  3. If the menu "Work Offline" entry is displayed and there is a checkmark in front of it, click this entry to remove the checkmark.
  4. Click the "Internet Options" menu entry and then "Connections".
  5. Enable the option "Never dial a connection".
  6. Click "OK" to save the settings.