+1 prefix in phone numbers

I don't think a Verizon iPhone has this, but just in case:

Check Settings > Phone. Is there a "Dial Assist" setting? If so, it should certainly be "On".

If not, try force restarting your iPhone as follows (assuming you have an iPhone 8):

• Press and quickly release the volume-up button
• Press and quickly release the volume-down button
• Press and hold the side button until the Apple logo appears.

If one of the above doesn't solve it, I am out of ideas. Maybe Verizon could assist.

"+1" is the international dialing code for the United States.

• Are you in the United States?
• Did you purchase your iPhone in the United States?
• Is the Region set to the United States? (Settings > General > Language & Region > Region)
• Have you been outside the United States recently?
• Is your iPhone associated with an American cellular carrier?
• Has it always been associated with an American cellular carrier?

That might be a change in Verizon's network. Try with Dial Assist off, also.

Go to Settings/Phone and make sure Dial Assist is on.

Sorry to hear that. Verizon's support has gone way downhill over the past few years. They apparently fired most of their tech support people and replaced them with inexperienced sales people. One of my friends was a support manager with them, and was laid off after 20 years.

Well, it sounds like something has changed.

You are in the U.S. OK, that answers one of the six questions I asked above.

oops, responded to the wrong post. Will try again