Hello,
Yes, it is possible to use a FRITZ!Box 5590 Fibre on a Wingo connection.
The exact procedure for setting up the FRITZ!Box is described here:
https://avm.de/service...If you have any further questions or require assistance from our technical support team, please contact us by e-mail at fritzhilft(at)avm(dot)de. Please state the ticket ID #6667289 in your enquiry so that we can allocate your support ticket more quickly.
Kind regards from Berlin
Your AVM team
Yes, I can confirm that. It has been working for me for six months without any problems, including the landline connection. You can find instructions on the AVM website:
https://ch.avm.de/service...If you also want to use the landline connection, you need to request the SIP access data from Wingo, which will be sent to you by post. For further telephony settings, you can find more information on the Swisscom Community page using the search function:
https://community.swisscom.ch