Turn incoming call to a conference on BlackBerry

I want to turn an incoming call into a conference call

My options:

1. When the user answers an incoming call, the app calls a second number, which I assume will put the first call on hold. Instead of having a conference, the incoming call is dropped. The outgoing call is done in the same thread as the callConnected(int) method.

2. Same as above except the call is done in a separate thread with or without a delay before the call.

None of these two scenarios are working. I have tried to hold the call and make the call on callHeld(). Th开发者_JAVA百科is didn't help either.