To the knowledge base

Cannot enable DECT Eco function

For technical reasons, the "DECT Eco" function is no longer available if a radiator control is registered with the FRITZ!Box. The DECT ULE (Ultra Low Energy) protocol itself already reduces the volume of data.

Note:If you are no longer using a radiator control, you can delete it in the "Home Network > Smart Home" menu in the FRITZ!Box user interface.