MetroPCS Communications, formerly known as General Wireless, is a cell phone service provider in the U.S. It’s a pay-as-you-go service, which doesn’t involve any contracts. It provides a number of features, including call block to keep your number from being shown on the other person's caller ID. When the called party’s phone rings, his caller ID will show “Unknown” or “Withheld,” and not the number from which you're placing the call. This is a useful feature if you don’t want the other person to know your name or number.
Press *67 on your phone’s dial pad.
Enter the particular number you wish to call.
Press the “Call” button to connect the call. Your number will not be displayed on the caller ID of the other phone.