1. From the home screen, tap the Phone icon.
   
2. Tap Dial Pad.
   
3. Swipe down from the top of the screen to reveal the menu.
   
4. Tap Settings.
   
5. Scroll to, then tap Show My Number.
   
6. Tap the Allow My Number To Appear When Calling switch to toggle on/off.
   Note: To block your Caller ID on a per-call basis, dial *67 before the 10-digit phone number.