Where and when do i dial "*77" to block blocked numbers from calling me?and does it block all blocked numbers?

Question

like when they call me and im on the phone with them?

Answer 1

*77 only blocks numbers who call you using *67....*77 is a paid feature...!

if you want to block real phone number, then you will need a callerID manager...or now the Panasonic DECT 6.0 has a new phone that lets you block phone numbers..