how do you do the *69 trick?

Question

or is it *67? cause some people say to do it that way, but i'm not sure. please help me out

Answer 1

I am not sure if those work on cell phones but *67 on home phone systems in the US is to block your name and # from being sent on an outgoing call

*69 on home phone systems in the US will give you the time and
# of the last received call.