Want to answer an incoming call during an ongoing call? It's called call waiting. It's easy, but you need to turn on call waiting before you can use this function.
Use call waiting
End active call
When you have an ongoing call, the new call is signalled by a sound.
Tap the accept call icon and drag the icon right.
Make sure the call you want to end is active.
Tap End call.
The active call is ended and the call on hold is automatically activated.
Tap End call to end the call and return to standby mode.