Operating Instructions and Installation Instructions

Performing a Manual Update
FRITZ!Box 6820 LTE 99
Performing a FRITZ!OS Update
1. Open the FRITZ!Box user interface.
2. Enable the advanced view.
3. Select “System / Update / FRITZ!OS File”.
4. Click the “Save Settings” button to save the current set-
tings of your FRITZ!Box on your computer and save the
export file on your computer.
Using this file you can restore the settings of your
FRITZ!Box as needed.
5. Click the “Browse...” button and choose the file with the
new FRITZ!OS you already downloaded and saved on
your computer.
6. Click the “Start Update” button.
The new FRITZ!OS is transmitted to your FRITZ!Box.
The update is complete when the lower LED in the mobile
communications display on the FRITZ!Box stops flashing.
Interrupting the FRITZ!OS update could damage your
FRITZ!Box. Do not clear the connection between
FRITZ!Box and the computer during a FRITZ!OS update,
and do not unplug the power cord.