I have very good reception throughout the flat

The range of the telephone depends on many different factors such as reinforcement bars, thickness of the walls, etc. The DECT ECO function, which is not activated ex works, should remain switched off in favour of the maximum range. This way I could still make phone calls in the neighbouring flat (20 m as the crow flies, 3 walls). To achieve greater ranges, the purchase of a Gigaset repeater would be recommended.