I don't seem to be able to enter a secondary number when calling into a conference call. I have searched my "new 8525" manual and can't seem to find a clue.

Example:
1 800 123 4567
Call gets answered - voice to "enter a pin"
*1234567*

I've tried the online keyboard, the telephone keyboard, the slide out keyboard. None of them have worked. My message from the callin number is that the entry is not correct. I don't know if it's the asterisks or I'm just not doing it correctly. Worse - I have several different pins I have to use and I have to wait for a message before I can type in the pin.

You may need to have DTMF support switched on, using HTweakC v2.01 or other registry tweak programs. Your carrier might be accepting the call without the DTMF tones, but your secondary carrier (the Con Call provider) might not be receiving them.