Online update How to update to the latest version of FRITZ!OS Follow these simple instructions to update your FRITZ!Box, FRITZ!Powerline, FRITZ!Repeater or FRITZ!Smart Gateway to the latest version of FRITZ!OS: Open the user interface of the device. Enter "fritz.box", "fritz.powerline","fritz.repeater" or "fritz.smartgateway" in the web browser. If required, log in with your user name and...
> https://en.avm.de/service/update-news/online-update/
Updating the firmwareDuring operation, the FRITZ!Box checks for updates for all of the registered DECT devices every 48 hours and within 30 minutes of being restarted. If the FRITZ!Box finds new firmware, it is updated automatically. This process may take several minutes. The firmware version it finds depends on the version of FRITZ!OS installed on the FRITZ!Box. You can see which version is...
> https://en.avm.de/service/knowledge-base/dok/FRITZ-DECT-500/1237_Updating-the-firmware/