If you’re experiencing failed calls with M1, it may be due to one of the following reasons. Here’s how to troubleshoot and fix the issue:
1️⃣ T-Mobile to T-Mobile Calls Fail
Issue: Calls may fail if:
• You are forwarding a T-Mobile number to M1
• and you have Caller ID enabled in M1
• and are calling another T-Mobile number
👉 Solution: Disable Caller ID in M1 settings before making the call. ✅
2️⃣ International calls are not supported
Issue: M1 currently supports calls only to U.S. and Canadian numbers. If you’re trying to call a number outside these regions, your call will fail.
👉 Solution:
• If you need to make international calls, use your personal carrier’s international calling plan.
• You can still receive international calls if the caller is dialing your M1 number. ✅
3️⃣ Call Forwarding Conflicts
Issue: If Call Forwarding is misconfigured, incoming calls may not go through.
Solution:
• Disable & re-enable Call Forwarding.
• Follow our Call Forwarding Setup Guide. ✅
4️⃣ Poor Internet Connection
Issue: M1 relies on Wi-Fi or mobile data for calls. If your connection is weak, calls may fail.
Solution:
• Ensure you’re connected to a strong, stable internet connection.
• Try switching between Wi-Fi and mobile data.
• Lastly, try switching to your cellular network. While on a call:
tap the 🛜 icon in the top right corner of the screen.
choose “Call with Cellular network.”
If needed, tap “Hang up & call with cellular.”
📚 For more here: How do I test my network connection with M1?
🙋 Still Need Help?
If none of these solutions work, reach out to M1 Support via chat for further assistance.