How to block or unblock my mobile phone number when making an outgoing call

To block your mobile phone number on a per-call basis, dial #31# before each phone number you call.

To permanently block your number use your Call Settings menu.

Get step-by-step instructions for your device on how to hide your caller information.

If you have permanently blocked your number, you can unblock it on a per-call basis by dialling *31# before you dial each phone number.