What is International Assist on my Lumia phone?

The International Assist option, which is enabled by default, is designed to automatically correct the most common errors that are made when dialing international numbers. You can enable or disable the International Assist feature by following these steps:

  1. Press the Start key.
  2. Tap the Phone icon.
  3. Tap the 3 dots (...) at the bottom right of the screen.
  4. Select Settings.
  5. Slide the International Assist toggle to either On or Off.