How To Block Caller ID Information
If you need to block your phone's caller ID information when placing a call, there are two things you can do that will block your phone number.
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Instructions
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To temporarily block your cell phone number, press *67 and then dial the number you wish to call. Example: Instead of dialing (930) 555-7555, dial *679305557555. Always dial *67 before you make a call.
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To permanently block your cell phone's caller ID information, call your cell phone carrier's customer service department and request a line block.
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When your number is blocked it will always show up on the other person's phone as "Private Number."
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Tips & Warnings
Dialing *67 before dialing a phone number also works to block numbers for land line phones.
If you choose to block your cell phone caller ID information for most calls, your number will not be blocked from emergency services and toll-free numbers such as 800, 900 and 700. Some cell phone carriers charge a monthly fee for the line block service.
