Answer:
Decide if you want the block to be permanent or if you want the ability to have your number show to some people all the time. There are codes that you can enter that will make your number not visible on Caller ID as long as you remember to enter it before you make the call. If you think you won't remember, then perhaps the permanent solution is a better choice for you. You can always show your phone number for a particular call by dialing *82.