The German mobile telephone provider Deutsche Telekom warns against the WiFi radiation from their Speedport router. In the operating instructions of the Telekom router "Speedport Smart" in the chapter "Safety Instructions and Data Protection" on page 21 under the heading "radio signals" you find a warning against WiFi radiation:
"The integrated antennas of your Speedport router transmit and receive radio signals, e.g. for the provision of your wireless WiFi network. Avoid placing your Speedport router in immediate proximity to bedrooms, children’s rooms, living rooms (means also common rooms or lounges, df) in order to keep the exposure to electromagnetic fields as low as possible."
See the instruction manual (in German)
https://www.telekom.de/hilfe/downloads/kurzbedienungsanleitung-speedport-smart.pdf
Do Deutsche Telekom secretly want to legally cover themselves for future lawsuits?