To hide your Caller ID, from the home screen, tap the Phone icon.
Tap the More icon then tap Call settings.
Tap Caller ID.
Tap Hide number. Note: To block Caller ID on a per-call basis, dial *67 or #31# before the 10-digit phone number. (Examples: *679995554444 or #31#9995554444)
To show caller ID, tap Show number. Note: To unblock Caller ID on a per-call basis, dial *82 before the 10-digit number. (Example: *829995554444)