You can make a restricted call without giving your number

Use *67 and then your number and it will come up restricted or private on their end they won’t have any caller Id for example *678472759400 then call have fun messing with the scammers LOL

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Be careful with this, when you *67 a business line your phone number is unmasked. I would never use your personal phone number to scambait, ever. Get a Textnow or Google Voice number.

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*67 has been around for almost as long as the phone. I wouldn’t recommend it. Besides there is a much simpler way. In every smartphone under call settings, you can set it to never show your number by default.

Early on I did use my personal number with *67, they called me back on the same number. Business line can access your restricted numbers for security.

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Is this technique possible throughout every country of the world??

Even if it is, it shouldn’t be used for this purpose. it isn’t effective. This is good if you want to call someone’s personal phone.