If you have Caller ID-blocking on your Comcast phone, when you call someone, your number will not show up on that person’s caller ID. Sometimes, though, that person may not answer your call because your number will not appear, or she may subscribe to a service that informs you she will not accept calls from a private number. In that case, if you want to talk to the person, you will need to unblock your call temporarily so your number may appear. It is a simple process, requiring you to dial a couple extra digits.
