Someone prank called me(with *67), I don't want the police I just want to know how to get their number.

If they blocked their number, then you can't access it, ever.

My cordless phone (swisscom classic s117)'s caller ID doesn't work. I can set up it.
I want to know how do I can to load any program to it.
binesh

First are you paying for CLID on your line. CLID is not free. Once you have it on the line the phone will read what is being sent over it.