While Arizona did not observe the Sunday end of Daylight Saving Time, some iPhones in the state configured with default settings did, falling back an hour along with those in the Pacific time zone.

April, an AT&T customer service representative, reported that the issue involves the configuration of time zone support in the iPhone’s Mail, Contacts and Calendars settings. By default, time zone support is on and set to Cupertino.

April provided the following instructions for disabling time zone support, so that this information can be obtained from AT&T’s network:

These steps will work for sighted users who are not running the VoiceOver screen reader for the blind. Instructions for blind users follow.

  1. Tap Settings on the Home screen.
  2. Tap Mail, Contacts, Calendars.
  3. Tap Time Zone Support.
  4. Tap the button to turn Time Zone Support off.

If you are a blind iPhone user who relies on Apple’s built-in VoiceOver screen reader, follow these steps to turn off time zone support:

  1. Press the Home button to move to the Home screen.
  2. Flick left or right to locate the Settings icon. This will be found on the first page of most iPhones.
  3. Double tap Settings.
  4. Flick right several times to locate Mail, Contacts, Calendars.
  5. Double tap Mail, Contacts, Calendars.
  6. Flick right until you locate “Time Zone Support, On.”
  7. Double tap “Time Zone Support, On.” You are now in the time zone support window.
  8. Flick to the right a couple of times to find a button labeled “Time Zone Support, On.”
  9. Double tap the button to turn this feature off. The iPhone will now pull all its time zone information from the cellular network.

Once the time zone support setting has been deactivated, close the settings screen by pressing the Home button and test the time change by following these steps:

  1. Press and hold down the Sleep button on the top of the iPhone for two seconds.
  2. Double tap the Power Off button. Single tap the button if you are not using VoiceOver. The iPhone will announce it is shutting down.
  3. Wait 5 or 10 seconds.
  4. Hold down the Sleep button for two or three seconds to start the iPhone.
  5. Allow 10 to 15 seconds for the iPhone to fully power up. If you use VoiceOver, its active status will be announced.
  6. The iPhone starts in a locked state, with the current time shown. Flick to the left a couple of times to hear it announced. Flick to the right twice and double tap to unlock the iPhone and go on your merry way.

As always, comments, corrections and all constructive feedback is useful.