Call waiting is a useful feature that allows you to put a phone call on hold to answer another incoming call on another line. Here are some general steps that may work for most phones:

1. When you’re on a call and another call comes in, you’ll hear a beep indicating the incoming call
2. To answer the second call, press the ‘Answer’ or ‘Accept’ button on your phone
3. This will put the first call on hold and connect you to the second call
4. To switch back to the first call, simply press the ‘Swap’ button (if available) or the ‘Hold’ button and then select the first call from the list of active calls

Please note that the exact steps for using call waiting may vary depending on your phone model and carrier. If these steps don’t work for you, we recommend checking you phone’s user guide for precise instructions