If you receive a call while you are already on a call, and your phone and phone network both support call waiting, then you can use the Q1 buttons to either end your current call or put it on hold and take the incoming call.
When you have a call waiting the Q1 will play a sound to alert you to the incoming call.
If you have a call on hold and your active call ends, either because the other party hung up, or because you ended the call by double-clicking the BlueAnt button, then the other call will remain on hold. Hold down the "Vol +" button for 1 second to release the hold and resume the call.
The Q1 supports multipoint technology. This means that you can use one Q1 headset with two different mobile phones or Bluetooth devices at the same time: if either phone rings, you can answer it with the Q1.
If you have two phones connected to the Q1, and you receive a call on one of them while you are already on a call on the other phone, then you can use the Q1's buttons to answer the second call.
You can also answer the call on the second phone using that phone's handset. However, if you do this, some phone models will keep the audio for that call on the handset, while other phone models automatically route the audio back to the Q1, putting your first call on hold. In order to be certain about where you will hear the audio, you are therefore recommended to always use the Q1 buttons if you want to answer the call.
If you do answer the second call using the second phone handset and find that the call audio is on the phone rather than the Q1, then you can transfer that audio back to the Q1 by holding down the "Vol +" button for 1 second. This will place the first call on hold.