The latest lab file on our download server, "fritzbox-XXXX-Labor-xxxx.zip", contains
- the lab version for your FRITZ!Box
- this "infolab-en.txt" file with important information on this lab version
- information, feedback options, and the file at en.fritz.com/fritz-lab


New Features: 
- Overload protection for smart outlets: The FRITZ!Smart Energy 200 and 210 smart outlets can now be turned off if a defined power limit is exceeded for a specified duration
- Routines with multiple triggers can be set up: Users can define an if-then link with multiple triggers for routines, so that the routine is started by various smart home devices
- SOS call: Up to four emergency contacts are automatically called one after the other in an emergency
- The F!Fon’s soft keys can be used as configurable speed dial buttons (phone number or function)
- DNS queries from the home and guest network can be filtered using specified filter lists

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# New Features and Improvements in FRITZ!OS 8.40
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This FRITZ! Beta offers a first look at the upcoming FRITZ!OS 8.50 and invites users to test new features in advance and provide feedback. The Beta lays the groundwork for new MyFRITZ!App features and optimizes the already industry-leading security architecture of FRITZ! products. In addition, switching FRITZ!Box models is made easier, with new features for Smart Home, parental controls, and telephony, as well as practical improvements to everyday convenience. In the coming months, additional FRITZ!Box models will be added and new features introduced—including the FRITZ!Box 5690 Pro with Matter Bridge functionality for more Smart Home options.

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# New Features in FRITZ!OS 8.40

## Internet:
- **NEW** DNS queries from the home and guest network can be filtered using specified filter lists

## DECT:
- **NEW** For simpler operation by challenged users, the following functions (among others) are available: After activation the soft keys can be used as quick-dial keys, as each key can be assigned a phone number or a function
- **NEW** The SOS call is part of the simple mode and allows up to four emergency contacts to be stored, who are automatically called in sequence in case of emergency Call duration and the number of times the call sequence repeats can be configured
- **NEW** The new "Simple Mode" for the FRITZ!Fon focuses menus and functions on telephony and greatly simplifies operation. The adjustments primarily address the restrictions of older people (accessibility) and give special attention to the needs of more technology-shy users

## Smart Home:
- **NEW** When the "Switch off in case of overload" function is enabled, smart plugs are turned off after a defined period of time when a defined power level is exceeded
- **NEW** Several triggers can be selected when creating the if-this-then-that statement of a routine

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# Further Improvements of FRITZ!OS 8.40

## Internet:
- **Improved** During manual configuration of WireGuard® connections, now VPN connections for user dial-in can be created as well
- **Improved** For local name resolution (via mDNS), the following are supported: fritzbox.local, gateway.local, box.local (FRITZ!Box only), repeater.local, fritzrepeater.local (Repeater/MeshSet only), as well as router.local and gateway.local in general
- **Improved** In parental controls, the function for extending online time by 45 minutes is now supported for shared time budgets as well
- **Improved** Information about the requesting device added to the event message by parental controls about blocked direct IP calls
- **Improved** To guarantee compatibility, the Let's Encrypt certificate for the MyFRITZ!Net address are renewed after the 2/3 of the term of validity for the current certificate has elapsed
- **Improved** Warning messages displayed when creating potentially dangerous port sharings were revised
- **Improved** For VPN connections, additional "remote networks" at the remote site can be added
- **Improved** If a WireGuard® connection drops, data intended for that connection is not sent over the internet connection (kill switch)
- **Improved** Port sharing is also possible for WireGuard® VPN connections that link companies
- **Improved** The MTU (Maximum Transmission Unit) can be set manually for all WireGuard® VPN connections
- **Improved** WireGuard® VPN connections can be created without a MyFRITZ!Net or DynDNS address
- **Fixed** Internet blocks for parental controls no longer worked when a VPN connection was used
- **Fixed** After changing the country and time zone settings, the Online Monitor could no longer be opened
- **Fixed** Blocking of devices in the guest network in parental controls did not work as expected
- **Fixed** Internet access (remote access) to the FRITZ!Box could be configured only while the FRITZ!Box was connected to the internet

## Wi-Fi:
- **Fixed** After deactivation of the 5-GHz band on the Mesh Master, it did not always transmit in repeater mode
- **Fixed** Corrected the display of energy consumption with reduced transmitter power

## Telephony:
- **Improved** Voice messages can be deleted automatically after a specified waiting period or when a specified count has been exceeded

## Mesh:
- **Improved** Via the FRITZ!Box user interface, one or multiple FRITZ! devices can be enabled for Mesh without having to press a button on the FRITZ!Box

## DECT:
- **Improved** Better support for DECT phones from other manufacturers without support for CAT-iq 2.0
- **Improved** Phone numbers belonging to a phone book entry can now also be sorted later in FRITZ!Fon

## Home Network:
- **Improved** User guidance added for changing and managing IPv4 addresses in the Network Device Details
- **Changed** The DNS suffix "fritz.box" is no longer distributed to home network devices via DHCP by default. Home network devices no longer automatically repeat failed name queries with the ending "fritz.box". The previous type of distribution can be enabled unter "Home Network > Network > Network Settings > Change Advanced Network Settings > IPv4 > DHCP"

## Storage (NAS):
- **Improved** Internet radio stations list preconfigured for more countries
- **Improved** Maximum permissible number of shares raised from 20 to 250

## System:
- **Improved** Clearer rendering of rate information in the "FRITZ!Box Info" push service mail when data capacity or free time was exceeded
- **Improved** The list of home network devices in the "Info" push service mail is now sorted by name
- **Improved** Users can now delete individual devices from the list of known devices before transferring settings to a new FRITZ!Box and receive guidance on managing devices that cannot be reached
- **Improved** More flexibility for selecting the FRITZ!Box name (UTF-8)
- **Improved** Minor corrections and translation updates to the offline help
- **Improved** When push service is enabled, the dispatch ID for sending support information to FRITZ! is also sent to the default recipient by mail
- **Fixed** The FRITZ!Box itself was listed as a connected network device in the "Info" push service mail

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History of New Functions and Improvements in FRITZ!OS 8.40
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# New functions of FRITZ!OS 8.40-134416

## Internet:
- **NEW** DNS queries from the home and guest network can be filtered using specified filter lists

# Further Improvements of FRITZ!OS 8.40-134416

## Internet:
- **Fixed** Internet access (remote access) to the FRITZ!Box could be configured only while the FRITZ!Box was connected to the internet
- **Improved** For VPN connections, additional "remote networks" at the remote site can be added
- **Improved** If a WireGuard® connection drops, data intended for that connection is not sent over the internet connection (kill switch)
- **Improved** Port sharing is also possible for WireGuard® VPN connections that link companies
- **Improved** The MTU (Maximum Transmission Unit) can be set manually for all WireGuard® VPN connections
- **Improved** WireGuard® VPN connections can be created without a MyFRITZ!Net or DynDNS address

## Telephony:
- **Improved** Voice messages can be deleted automatically after a specified waiting period or when a specified count has been exceeded

## DECT:
- **Improved** Better support for DECT phones from other manufacturers without support for CAT-iq 2.0

## Home Network:
- **Improved** User guidance added for changing and managing IPv4 addresses in the Network Device Details

## System:
- **Improved** When push service is enabled, the dispatch ID for sending support information to FRITZ! is also sent to the default recipient by mail

# Improvements of FRITZ!OS 8.40-134416 within FRITZ!Labor

## Internet:
- **Fixed** After updating to the lab version, during operation via WAN no internet connection could be established via UPv4 on certain lines

## System:
- **Improved** Stability
- **Fixed** Very frequent restarts of the FRITZ!Box in certain scenarios

## USB:
- **Fixed** The "Display and Edit" option did not work for sharing folders

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# Improvements in FRITZ!OS 8.40-133037 within FRITZ!Lab

## System:
- **Improved** More flexibility for selecting the FRITZ!Box name (UTF-8)
- **Improved** Minor corrections and translation updates to the offline help

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Additional Feedback on FRITZ!OS
======================================

In addition to direct feedback in our lab area en.fritz.com/fritz-lab, there are three additional feedback functions in the user interface which provide information. We have automated the processing of feedback supplied by these functions.

1) Wi-Fi feedback via "Wi-Fi / Wi-Fi Network": Feedback icon after the clients
2) VoIP feedback via "Telephony / Telephone Numbers / Voice Transmission", "Other" column: Feedback icon after each call

Information on the Lab update:
============================

This FRITZ! Lab firmware is a beta version. We've tested it in standard environments before release, but it may still result in bugs. FRITZ! is not liable for any damages that may arise from the use of the Lab version.

Information on working with Lab versions

We appreciate any feedback from our users, which can be submitted at: en.fritz.com/fritz-lab. This page also lists all of the current FRITZ! Lab versions with corresponding feedback areas.

Before you start testing the Lab version

1) You haven't installed the latest firmware for your FRITZ!Box yet? You first need to update the firmware to the latest release.
2) Save your current settings under "System / Backup". The saved settings will be needed if you want to switch back from the Lab firmware back to the release firmware.


Testing the Lab version

Once the latest FRITZ!OS version has been installed on your FRITZ!Box and you've saved your current settings, you can begin testing.

1) Unzip the "fritzbox-yyyy-LabBETA-xxxxx.zip" file.
2) Use the FRITZ!Box user interface to install the update:
- Select "View: Advanced" in the footer.
- Click "Update" in the "System" menu.
- Switch to the "FRITZ!OS File" tab.
- Follow the instructions displayed on the screen.
- Enter the path to the Lab firmware and the name of the Lab file (FRITZ.Box_xxxx-0x.xx-xxxxx-LabBETA.image) in the input field.
3) The Lab version is installed on the FRITZ!Box. The FRITZ!Box will then restart.


Restoring your device to how it was before testing
You can switch back to the official FRITZ!OS at any time under "System > Update > FRITZ!OS Version" or reset the FRITZ!Box back 
to the official FRITZ!OS using the enclosed Windows program "recover.exe" (included in the Lab package).

_________________________________________________________

FRITZ! GmbH 2004 2026. All rights reserved.

This FRITZ! firmware package contains files that are distributed under various licenses, in particular under an FRITZ! proprietary license 
or an open-source license (GNU General Public License, GNU Lesser General Public License or FreeBSD License). For details on the various 
licenses, see the "license.txt" file (https://download.avm.de/fritzbox/license.txt).
The source code of the files distributed as open source can be requested in writing to fritzbox_info@avm.de.

FRITZ! grants the non-exclusive right to use this FRITZ! firmware package, which is supplied exclusively in object code format. 
The licensee may create only one copy of the software, which may be used exclusively for backup purposes.
FRITZ! reserves all intellectual property rights except as expressly granted herein. In particular, without previous approval in writing 
and except as permitted by law, this FRITZ! firmware packet may not be reproduced, distributed or in any other manner made publicly accessible, nor may it be edited, disassembled, reverse engineered, translated, decompiled or otherwise "opened" in whole or in part, and subsequently reproduced, distributed or made publicly accessible
_________________________________________________________
TJA/SST 10072026