Use call waiting
When you have an ongoing call, the new call is signalled by a sound.
Press Answer.
Press Answer.
Swap calls
Your calls are displayed on a list and the call on hold is indicated by On hold.
Press the required call to select it.
Press the required call to select it.
End active call
Make sure the call you want to end is active.
Press End call.
The active call is ended and the call on hold is automatically activated.
Press End call.
The active call is ended and the call on hold is automatically activated.
End call
Press End call to end the call.