The Caller ID system is convenient, but there might be times when you don't want to reveal your identity when you place a call. For those situations, you can block your Caller ID information.

However, there are times that you might want to block your own number, so it won't appear on caller ID. Maybe you're trying to surprise a significant other, or calling a company that you don't ...

60 - Prevents calls from select phone numbers. *67 - Block phone number on Caller ID systems. *69 - Redial the last number that called you. *70 - Places your call on hold so you can answer another.