Use call waiting
When you've an ongoing call, the new call is signalled by a sound.
Press Connect to answer the call.
The first call is put on hold.
Press Connect to answer the call.
The first call is put on hold.
Swap calls
Press Options.
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.
Press Options.
Scroll to Retrieving single and press the Navigation key.
Exit
Press Disconnect to return to standby mode.