Since phone companies hold records of all your previous calls, they have usually given their customers an Anonymous Caller ID service when they register as a regular user. The first method you can use is to call your phone company. This is because finding out who an unknown caller is can allow you to block their number and stop receiving their unnecessary calls. This is why, if you are at the receiving end of such calls, you need to learn how to unmask the caller’s number. However, some people misuse it for harassment and/or other illegal activities. The No Caller ID feature is typically used to prevent tracking of your phone, for which you may have legitimate reasons.
This will automatically block your caller ID on their phone. Simply type in *67 before the number that you wish to call.
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