My iPhone 16 add a 0 to phone numbers after returning from international travel

Question

My iPhone 16 add a 0 to phone numbers after returning from international travel

I traveled internationally last week. Since being back in the US, I can't make many phone calls. It adds a 0 before many phone numbers, which then can’t dial. I have to manually enter the numbers correctly in the phone keypad. iPhone 16 Pro running iOS 26.3 in 2026. I’ve restarted the phone (multiple times) and that doesn’t help. Cell service provider has assured me 3 times cell network is fine. [General, Transfer or Reset iPhone, Reset, Reset Network Settings] doesn’t work… [General, Transfer or Reset iPhone, Reset, Reset Location & Privacy] doesn’t work… [Airplane Mode toggle off, toggle on] doesn’t work … I saw this same issue posted in 2024, but the past remedy doesn’t work. Why is this still a problem for years?

[Re-Titled by Moderator]

Original Title: Back in the U.S.A. and now my iPhone adds a 0 to all calls from contacts. I can no longer auto dial. I have to type each number in to call out. Thanks Apple.

iPhone 16 Pro, iOS 26

Posted on Feb 22, 2026 5:05 PM

Answer 1

Top-ranking reply

AirTag_disconnect_oldworkphone Author

Level 1

24 points

Feb 22, 2026 5:18 PM in response to AirTag_disconnect_oldworkphone

You have [Settings, Apps, Phone, Dial Assist, Toggled on]… Toggle Dial Assist to off when back in the U.S.A. Dial assist can be toggled on when traveling outside the U.S. because it will add the country code to your contact for dialing back to the U.S. Thanks to Tools Truck for the reminder of what to check.

My iPhone 16 add a 0 to phone numbers after returning from international travel

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