How do I manage caller ID on my mobile service?

Your caller ID preference determines whether your phone number is visible to people you call. You can choose to hide your number from being displayed on outgoing calls, either on a call-by-call basis or permanently. 
 

Temporary caller ID blocking

• To block on a call-by-call basis: Dial #31# then the number you’re calling
• To unblock on a call-by-call basis (if your number is permanently blocked): Dial *31# then the number you’re calling 
  
  

Permanent caller ID blocking

Most mobiles have a Show My Caller ID setting which you can turn off. The location of this setting varies depending on your device, but is usually located in Settings > Phone. For more information, please check your device manual.
 

 To check if your mobile number is being displayed to callers:

1. Call *#31# then press the Send/Call button
2. A message will display on your screen