An apparatus for detecting body condition has a communication unit capable of being worn by the body to be detected. The communication unit includes at least one sensor for detecting a signal indicative of the body condition. The apparatus has also a pickup coil of a component of a mobile phone arranged to operate as an inductive antenna for receiving the signal from the communication unit so that said pickup coil is further operable for said component in order to operate the mobile phone. An existing coil in the mobile phone is used for receiving the signal indicative of the body condition from the detector telemetrically. Therefore there is no need to add new components. Existing component can thus be used to detect the signal telemetrically at the mobile phone.