1. Dial *#31#
Almost sure shot and easiest way to fix the problem of call failed on your iPhone is to dial *#31#.
2. Turn off and on Airplane Mode
Open the Settings app and tap on the icon for Airplane Mode to enable it. After 30 seconds, tap on the same toggle to disable it. Now, try to make a phone call. It should work.
3. Restart your iPhone
Even after following the above fix, if you have trouble making phone calls, try restarting your iPhone. The simplest way is to use the buttons as you usually do. You may also open the Settings app and tap on General. Next, choose Shut Down. After a minute, turn on your iPhone and try making a call. The issue will most likely be fixed.
4. Remove and reinsert SIM card
All modern iPhones have the SIM card slot on the right side. Use the ejector tool or a pin to remove the SIM card carefully. Next, slowly and with caution, rub it on a soft dry cloth and insert it back.
5. Reset Network Settings
If you think that network is the culprit behind call failed on iPhone, you can go for Reset Network Settings. Most network-related issues like the inability to make phone calls, message failures, cellular data issues are fixed after a reset. Please know that this won’t delete any personal data, but things like your saved Wi-Fi connection, Bluetooth devices, VPN configurations will be erased.
6. Reset All Settings
If the above less severe reset did not work, please follow the same steps as above and choose Reset All Settings. The consequences of this are more significant. It will erase or return to default, all settings you have ever changed on your iPhone. This includes keyboard settings, Home Screen layout, Wi-Fi, Bluetooth, VPN, Location Settings, and more. But, it won’t delete any personal data like photos, videos, apps, music, etc.
7. Update your software
Once the process completes, there is a strong possibility that the call failed issue is successfully addressed.
8. Check the blocked contacts list
Maybe someday you had intentionally or accidentally blocked a contact. To make sure that the number you are trying to call is not blocked. For this, open the Settings app and tap on Phone. Scroll down and then tap on Blocked Contacts. If the person/number is added here, swipe right to left on it and tap on Unblock.
9. See if Call Forwarding is Turned On
Call forwarding may also cause interference, and thus if you are facing call failures, make sure you turn it off. For this open the Settings app and tap on Phone. Next, tap on Call Forwarding. Wait for it to load. And if it is enabled, tap on the toggle to disable it.
10. Contact Your Carrier
Finally, if nothing helps, contact your mobile carrier. You can reach them via email, Twitter, or use their mobile app. Make sure there is no pending bill or unpaid charges that have resulted in the suspension of the service. That’s all! These are some ways to successfully fix the call failing issue on the iPhone. I hope one of the solutions helped you out of this problem. At last, also give a shot at updating your carrier settings.
Video: 7 Ways to Fix Call Failed on iPhone
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