The latest lab file on our download server, "fritzboxlabor-5590_Fiber_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: 
- New prioritization feature automatically ensures the best connection
- 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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# Top functions of FRITZ!OS

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

## Smart Home:
- **TOP** Overload switching for FRITZ!Smart Energy 200 and 210 smart plugs
- **TOP** Smart Home: Routines can be configured with multiple triggers

# New functions of FRITZ!OS

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

## DECT:
- **NEW** Soft keys as quick-dial keys: In simple mode, the soft keys can be used as quick-dial keys for phone numbers or functions
- **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
- **NEW** The new "Simple Mode" for the FRITZ!Fon focuses menus and functions on telephony and greatly simplifies operation, especially for less tech-savvy users

## Smart Home:
- **NEW** Frequently used smart home routines such as "Leaving the House", "Coming Home" or "Vacation" can be automated with just a few clicks and triggered, for example, with zones (geofences) that were previously configured in the FRITZ!App Smart Home
- **NEW** Routines support IF-THEN linkages with multiple triggers – as, for instance, zones defined on the smartphone. This means a routine does not start until the last resident has left the house with their smartphone
- **NEW** When the "Turn 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

# Further Improvements of FRITZ!OS

## Internet:
- **Changed** The domain "fritz.box" is no longer distributed as a domain name via DHCP by default; therefore, DNS queries for hostnames are not automatically expanded
- **Fixed** Internet access (remote access) to the FRITZ!Box could be configured only while the FRITZ!Box was connected to the internet
- **Fixed** Internet blocks for parental controls no longer worked when a VPN connection was used
- **Fixed** Under "Internet > Account Information > Internet Connection", manual configuration of the IP address was missing for 4xxx FRITZ!Box models if internet access via "DSL or fiber optic modem" was selected (FRITZ!Box 4xxx only).
- **Improved** During manual configuration of WireGuard® connections, now VPN connections for user dial-in can be created as well
- **Improved** For VPN connections, additional "remote networks" at the remote site can be added
- **Improved** For local name resolution (via mDNS), the following are supported: fritzbox.local, gateway.local, box.local 
- **Improved** If a WireGuard® connection drops, data intended for that connection is not sent over the internet connection (kill switch)
- **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** 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** The upstream and downstream values for the top consumers are displayed in the Online Monitor
- **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** 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
- **Improved** Phone numbers belonging to a phone book entry can now also be sorted later in FRITZ!Fon
- **NEW:** New "Simple Mode" for the FRITZ!Fon brings simplified operation and an SOS call

## Home Network:
- **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"
- **Fixed** Rendering of special characters in device names was not always correct
- **Improved** User guidance added for changing and managing IPv4 addresses in the Network Device Details

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

## System:
- **Fixed** The FRITZ!Box itself was listed as a connected network device in the "Info" push service mail
- **Improved** Clearer rendering of rate information in the "FRITZ!Box Info" push service mail when data capacity or free time was exceeded
- **Improved** Corrected details in the offline help and translations
- **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** When push service is enabled, the dispatch ID for sending support information to FRITZ! is also sent to the default recipient by mail

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History of changes within FRITZ!Labor

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# Improvements of FRITZ!OS within FRITZ!Labor -136115

- **Verbesserung** Stabilität verbessert

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# Improvements of FRITZ!OS within FRITZ!Labor -135922


## Internet:
- **Improved** Optimized communication between FRITZ!Box and app reduces the probability of lost messages

## DECT:
- **Improved** Faster audio connection of DECT phones with the "HD preferred" setting to other HD phones

# Improvements of FRITZ!OS within FRITZ!Labor

## Internet:
- **Fixed** In some cases, after the DNS filter was enabled, an incorrect error message about insufficient memory was displayed

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# Improvements of FRITZ!OS within FRITZ!Labor -135708

## DECT:
- **Fixed** When extended security was active, some Gigaset phones count not reconnect with the FRITZ!Box after being turned off

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# Improvements of FRITZ!OS within FRITZ!Labor -135583

## Internet:
- **Fixed** Configuration of a WireGuard® connection was not possible if a WireGuard® connection with "Send all network traffic via the VPN connection" was already configured
- **Fixed** During import of configuration comments were not always ignored

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# Initial lab-version FRITZ!OS -135235

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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) DSL feedback via "Internet / DSL Information / Feedback"
2) Wi-Fi feedback via "Wi-Fi / Wi-Fi Network": Feedback icon after the clients
3) 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-labor-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-Labor.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.
_________________________________________________________
HKR 20260730