Yes, the repeater also works with an Internet Box 2 from Swisscom. However, the mesh functions cannot be used (only with a FRITZ!Box with OS >7.xx). To increase the WLAN of an Internet Box 2, I would therefore use the Swisscom repeater called WLAN-Box. This can then also be managed via the Swisscom login. The price of the Swisscom version is similar, but the Swisscom "WLAN-Box" offers more network connections (RJ45). I myself use FRITZ!Box with FRITZ!Repeater = stay with the same manufacturer.