Please connect the Fritz!Box after receiving it and open a homepage (e.g. www.teleboy.ch). Now a page should appear where you are asked for a code and where you can see a Binding ID in the lower part, starting with AC0.XXX.
Upload the number using the link you received by email, or send us a photo of the Binding ID or directly the ID by email, so we can enter the number.
You can find the Binding ID after opening a homepage in the following window in the lower area: