How to Turn Off Dial Assist on iPhone (iOS 15 Update)

Disable Dial Assist if you are having trouble making international calls.

* This post is part of iPhone Life's Tip of the Day newsletter. . *

What is Dial Assist? Dial Assist on iPhone automatically adds international and local prefixes to phone numbers, so you can make an international call without entering the country code. However, if you save international numbers with prefixes in their contacts, the Dial Assist Feature can accidentally cause problems.

Related: How to Know If Someone Blocked Your Number on iPhone

Why You'll Love This Tip

  • Stop your iPhone from automatically determining country codes for outbound international calls. 
  • Prevent international call issues if you already have the full number (country code, area code, phone number) saved for a contact. 

How to Turn Off Dial Assist on iPhone

Not all carriers enable Dial Assist, but most major ones do, including Verizon, Sprint, and AT&T. If you're having problems calling international numbers on iPhone, try disabling Dial Assist and see if that helps. For more great iPhone tips, sign up for our free Tip of the Day newsletter! To disable Dial Assist on your iPhone:

  1. Open the Settings app.

  2. Scroll down and tap Phone.

  3. Toggle off Dial Assist. The toggle will be gray when disabled.

That’s it! If you decide you want to use Dial Assist in the future, you can just follow the simple steps above to turn it back on. 

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Author Details

Conner Carey's picture

Author Details

Conner Carey

Conner Carey's writing can be found at She is currently writing a book, creating lots of content, and writing poetry via @conpoet on Instagram. She lives in an RV full-time with her mom, Jan and dog, Jodi as they slow-travel around the country.