Jim from the "My Temp Number Helpline" teaches us to block outbound caller ID on your phone. The first way to do this is to open up the dial pad and enter *67 before the number you want to dial. This will show up on the receiving line as "Private Number" or "Unknown". To permanently block the number you go into your phone's settings. Then click on the word phone. Then click where it says "Show my caller id". If this setting is off, then your number is blocked on all outbound calls. This is useful for always blocking your number, but the first method is best for individual calls.