Device Guides
Apple iPhone 5s
Change device
iOS is the operating system software installed on your iPhone. To find out which version you have: Tap Settings, Tap General, Tap About, and view the version number.

Buy now
Search in Apple iPhone 5s
How to
Turning caller identification on my mobile phone on or off
You can turn off your own caller identification, your number will then not be shown at the receiving end when you make a call. You can also make one call with hidden caller identification. Your number is only hidden when you make voice calls not when you send messages.
Tap Settings.
Tap Phone.
Tap Show My Caller ID.
Tap the indicator next to "Show My Caller ID" to turn the function on or off.
Tap the Home key to return to the home screen.