three way calling &Switching b/w Calls & Release Sin

[telugite]

I saw the manual for how to make three way calling.

I understood how to make 3-way calling. when i am in a call either "recieve a new call and press talk again" or "make a new call and press talk again"

My problems are:

1. I am not able to end/release a single call after making conference.

2. I am not able to end/release the new call and continue on the old call unless the new call eneded by the other party.

2. I am not able to swap the calls when i am not in conference call.

I was able to these in my previous winodws mobile phones t-mobile SDA and Dash.

Is ther any additional app to make this possible or Is there a way of operating the mogul to achieve these.

Please help.