A method for selecting audio input from a microphone of a hearing device worn by a user or a microphone of a mobile device , when the user of the hearing device is using the mobile device for performing a telephone call, the method comprising: detecting proximity between the hearing device and the mobile device , wherein proximity between the hearing device and the mobile device is detected from a received signal strength and/or a signal strength loss of a radio transmission link between the mobile device and the hearing device , wherein the radio transmission link is used to transmit data and/or audio signals between the mobile device and the hearing device and wherein proximity between the hearing device and the mobile device is detected by comparing the signal strength and/or signal strength loss with a threshold; receiving an audio input with the microphone of the hearing device and generating a hearing device audio signal from the audio input with the hearing device ; determining a signal-to-noise ratio of the hearing device audio signal ; if proximity between the hearing device and the mobile device is detected and the signal-to-noise ratio of the hearing device signal is smaller than a further threshold: receiving an audio input with the microphone of the mobile device and generating a mobile device audio signal from the audio input ; transmitting the mobile device audio signal from the mobile device into a communication network ; if proximity between the hearing device and the mobile device is not detected: transmitting the hearing device audio signal from the hearing device to the mobile device via the radio transmission link ; transmitting the hearing device audio signal from the mobile device into the communication network . detecting proximity between the hearing device and the mobile device , wherein proximity between the hearing device and the mobile device is detected from a received signal strength and/or a signal strength loss of a radio transmission link between the mobile device and the hearing device , wherein the radio transmission link is used to transmit data and/or audio signals between the mobile device and the hearing device and wherein proximity between the hearing device and the mobile device is detected by comparing the signal strength and/or signal strength loss with a threshold; receiving an audio input with the microphone of the hearing device and generating a hearing device audio signal from the audio input with the hearing device ; determining a signal-to-noise ratio of the hearing device audio signal ; if proximity between the hearing device and the mobile device is detected and the signal-to-noise ratio of the hearing device signal is smaller than a further threshold: receiving an audio input with the microphone of the mobile device and generating a mobile device audio signal from the audio input ; transmitting the mobile device audio signal from the mobile device into a communication network ; receiving an audio input with the microphone of the mobile device and generating a mobile device audio signal from the audio input ; transmitting the mobile device audio signal from the mobile device into a communication network ; if proximity between the hearing device and the mobile device is not detected: transmitting the hearing device audio signal from the hearing device to the mobile device via the radio transmission link ; transmitting the hearing device audio signal from the mobile device into the communication network . transmitting the hearing device audio signal from the hearing device to the mobile device via the radio transmission link ; transmitting the hearing device audio signal from the mobile device into the communication network . <EOS>