Info on FRITZ!Box 4040

The update file "FRITZ.Box_4040.en-es-it-fr-pl.151.06.51.image" on contains the latest FRITZ!OS (Firmware) for the FRITZ!Box 4040.

Attention: This update file is only intended for use with FRITZ!Box 4040!
Please follow the instructions at the end of this file to install the update.

Product: FRITZ!Box 4040

Version: FRITZ!OS 6.55

Language: English, French, Italian, Polish, Spanish

Release date: 04/11/2016

New features: - FRITZ!OS 06.55 with stability improvement
New features with 6.53:

Improved: Better stability

Change: USB 3.0 port set to "Green Mode USB 2.0" in the factory settings

Instructions for installing the update:

Use the update function offered in the user interface to install the update. This automatically offers you the right FRITZ!OS. Click "Wizards", select "Update" and then follow the instructions on the screen.
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This AVM firmware package contains files that are propagated under different licenses, in particular under a license held by AVM or under an open-source license (namely the GNU General Public License, GNU Lesser General Public License or FreeBSD License). For details on the various licenses, see the "license.txt" file (
The source code of the files propagated as open source files can be obtained upon a written request to

AVM grants the non-exclusive right to use this AVM 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 use.
AVM reserves all rights that are not expressly granted to the licensee. Without previous approval in writing, and except for in cases permitted by law, it is particularly forbidden for this AVM firmware packet to be
- copied, propagated, or in any other manner made publicly accessible, or
- processed, disassembled, reverse engineered, translated, decompiled or in any other manner "opened" and subsequently copied, propagated or made publicly accessible in any other manner.

LN 2016-11-04