With call waiting (network service), you can answer a call when you have another call in progress.
|Activate call waiting|
Select Menu > Settings and Calling > Call > Call waiting.
|Answer a waiting call|
Press the call key. The first call is put on hold.
|Swap between an active call and a call on hold|
Select Options > Swap.
|Connect the call on hold to the active call|
Select Options > Transfer. You disconnect yourself from the calls.
|End an active call|
Press the end key.
|End both calls|
Select Options > End all calls.