What Does It Mean to Lock or Unlock a Number on Your Cell Phone?

Answer

I think you are referring to blocking a number. Although your cell phone company can lock your phone or your phone number. Blocking a number means that a person calling or texting from a specific number will receive a phone is not service message. You will also not be able to call or text the blocked number.
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A phone that is locked is programmed to work only with a specific mobile phone carrier. Without unlocking the phone, it is not possible to use it with another carrier. Unlocking a
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