Couple ways, server bouncer which can make some phone calls untraceable, but most are done these days via online phone calls that can execute incoming calls and never have a call back number. (i.e. Skype, Gmail, etc) ~Good luck!
Couple ways, server bouncer which can make some phone calls untraceable, but most are done these days via online phone calls that can execute incoming calls and never have a call back number. (i.e. Skype, Gmail, etc) ~Good luck!