This is why a "help" section is needed for features:

I guess I am confused between:

Block calls marked as private
and
Block all Unknown Calls

#1) What is the difference between "private" and "unknown" calls?

#2) I had "Block all Unknown Calls" set and my wife tried calling home from her cell phone and I tried on my cell as well. The cell phone caller ID shows up as "CELL PHONE NJ 908-XXX-XXXX" (actual number replaces the X's) but the call gets blocked when set as "Block all Unknown Calls."

Is this the correct action? Even using the "unblock prefix" before dialing doesn't pass the call since it's not really a blocked call.