Use call waiting
When you have an ongoing call, the new call is signalled by a sound.
Press Connect.
Press Connect.
Swap calls
Your calls are displayed on a list and the call on hold is indicated by On Hold.
Scroll to Swap and press the Navigation key to swap calls.
End active call
Make sure the call you want to end is active.
Press Disconnect.
Press Disconnect.
Scroll to Resume and press the Navigation key to resume the ongoing call.
Exit
Press Disconnect to end the call and return to standby mode.