1. When the headphones are connected to two devices, and neither device is in a call state:
The headphones will output the ringing sound from the device that's receiving a call.
2. When the headphones are connected to two devices, and one of the devices is already in a call:
The headphones will play the incoming call alert and the headphones's button will prioritise controlling the device that's receiving a call. If the headphones hang up the current call, the audio channel will switch to the other device that's receiving a call.
Note: please refer to the product instructions on the official Nothing official website or get in touch with our Customer Support.