1. While on a call, tap answer to place the current call on hold and answer the incoming call.
   
2. To add a call, tap add call and then dial the desired number.
   
3. Tap merge calls to merge the calls.
   
4. To end the conference call, tap end call.
   
5. To separate the calls, tap private.
   
6. Tap the desired the call.
   
7. Tap end call to end the current call.