How do u use the *77 to block private calls

Question

such as do mark *77 and ur phone number how do u use it

Answer 1

*77 is the police!!  its *67 and just dial that plus the number & your phone number will come up blocked on whoever's phone you are calling.  

Answer 2

Before typing to in the phone number you want to call you want to press *67

Answer 3

just punch *77 which is ACR anonymous call rejection!!

but its not free with all phone providers........but you know if you got it if your hear a stutter tone after you punch the *77...!

ppl who call your house using *67 can't get thru anymore....