[2sa]

Take a look at your call log...it should tell you everything you are looking for... You can access it two ways from your Today screen....

The easiest for me is press the green phone(send key)>>Then scroll up to call log

OR

You can press Menu>>Scroll down to Call Log.

Once you are in the call log, you can press Menu again and filter by:
All Calls
Missed
Outgoing
Incomming
By Caller
Data Log

Hope this helps.