Call Waiting allows you to never miss a phone call even when you're on another call. For most this is a welcomed feature on their iPhone, but for others it can become disruptive for a variety or reasons. Here's how you can disable and enable Call Waiting on your iOS device:
- Open the settings app on your device.
- Scroll down and tap Phone.
- Tap Call Waiting.
- Tap the Call Waiting slider so it is OFF/White.
People will now be directed to your voicemail instead of being able to interrupt your current phone call. This is useful when you're on important calls, or are receiving a lot of calls at once.