What is the difference between Caller Number Non-Display on a permanent and per call basis?
For Caller Number Non-Display on a permanent basis, your number will not be displayed on all recipient’s phone. Whereas, per call basis will allow you to decide not to display your number for the call that you are making. Simply
enter #31# before dialling the number to call.
Does this service work when I make calls to an overseas number?
It may not work as the service is dependent on the overseas network operator.