Mac Phone app opens Teams instead of using iPhone when I try to dial a call.

Question

With Mac Tahoe, if I try to dial a call with the Mac Phone app, it opens Teams instead of placing the call via my cellular account, as it is supposed to do. I uninstalled Teams, and the Phone app worked correctly. I reinstalled Teams and the problem reoccured. Teams is making the Mac Phone app useless. Any suggestions on how to resolve this. I have gotten zero useful information from Apple and Microsoft support chats.

Answer 1

Dear @smp,

Thank you for posting your question in the Microsoft Q&A forum. I understand that when you try to place a call from the Phone app on your Mac, Teams opens instead of dialing through your iPhone’s cellular line, and uninstalling Teams temporarily fixes it until you reinstall.

This issue could cause by Microsoft Teams setting itself as the default app for phone calls on your Mac. When you try to dial a number, macOS uses the default “tel” handler and Teams has taken over that role. That’s why uninstalling Teams temporarily fixed the issue but reinstalling it brought the problem back.

To better assistance, could you please confirm following information:

• Which macOS version are you running (e.g., macOS Sequoia 15.0 or 15.1)?
• Do you see a “Default for calls” option under FaceTime > Settings?
• Is the new Phone app installed and working for other calls (e.g., via iPhone Continuity)?
• Are you signed into the same Apple ID on your Mac and iPhone?
• Is Calls on Other Devices enabled on your iPhone (Settings > Phone > Calls on Other Devices)?
• Does Teams prompt you to become the default calling app during installation, or does it happen silently?
• Are you using Teams for VoIP calls only, or is it integrated with the regular phone network/Direct Routing?

In the meantime, I recommend some steps below:

1. Check Default Call App
   • Open the FaceTime app on your Mac.
   • Go to FaceTime > Preferences (or Settings).
   • Ensure “Default for calls” is set to FaceTime (or the Phone app), not Teams.
   • Change it to FaceTime or your iPhone (whichever is listed).
   • Close the preferences window, your Mac should now use your iPhone for calls again.
   This will restore the expected behavior, so when you dial a number, your Mac will route the call through your iPhone’s cellular network instead of launching Teams. Note: If Teams is opened again, it may reset itself as the default calling app. If that happens, just repeat the steps above to switch it back. We’re aware this behavior has affected other users as well, and we’re working to improve the experience.
2. Reset Default Handlers
   • Open System Settings > Privacy & Security > Default Apps.
   • For "tel://" links, set the handler to FaceTime or the Phone app.
3. Disable Teams Call Integration
   • In Teams, go to Settings > Calls.
   • Turn off any option like “Integrate with system for calling” (if available).

Note: those settings could be little differences between versions.

Please understand that our initial response does not always resolve the issue immediately. However, with your help and more detailed information, we can work together to find a solution.

Your detailed response will help us diagnose and investigate the issue more efficiently.
I truly appreciate your patience and understanding. If you have any further questions or need further clarification, please feel free to reach out. I'm looking forward to hearing from you.

Thank you for your cooperation.

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