If you've ever tried to make a phone call on your iPhone only to see the "Call failed" message, you know how frustrating this can be. There are several reasons why a call might fail on your iPhone. Sometimes the phone may be busy, but most often because of network issues. If a call fails, the network cannot complete the connection between you and the person you were trying to call.
Here are some common solutions to fix a call failed message on your iPhone:
Check Your Network Connection
If you're using Wi-Fi or cellular data, check these connections are working properly. Try disabling Airplane Mode and then turning it back on again. This will reset your connections and allow them to work properly again.
Restart your iPhone
If none of these fixes work for you, restarting your device should solve the problem. Press Home + Volume Down + Power until the Apple logo appears on the screen. This will take about 10 seconds. Your device will then start up as normal, and all of its settings, including cellular data connections, should be restored to their original state before the issue occurred to allow calls to go through once more.
Check Your Carrier's Coverage Map
Suppose you've traveled to a new area within your carrier's coverage area or recently moved to a new location and still need to update your account information with the carrier. In that case, this could be causing problems with calls. It's best to check with your carrier to ensure that they don't have any issues with their network in the area you're trying to reach someone.
Check Wi-Fi Calling Settings
If you have Wi-Fi calling enabled on your iPhone, this could affect whether incoming calls reach you using cellular data instead of Wi-Fi. To ensure this isn't causing an issue, go into Settings > Phone > Wi-Fi Calling and disable it. If the problem persists after disabling Wi-Fi calling, contact your carrier for further assistance in troubleshooting this problem.
Delete Old Messages and Contacts
Your iPhone needs room for its operating system and apps, so you don't want too many apps installed simultaneously. If you've been using your device for years and haven't cleaned up its storage lately, it's time to delete some old messages and contacts from your device's memory. You can delete an individual message by swiping left on it in the Messages app and tapping Delete, or you can go into Settings> General > iPhone Storage > Messages & Chats and tap Edit (blue circle with a checkmark) before tapping Delete All Conversations.
Turn Off VoLTE
VoLTE (voice over LTE) is intended for high-quality phone calls, but it can sometimes cause audio issues during a call when used between two phones on different carriers. If you're having trouble making or receiving calls in specific situations — such as at home or work — try turning off VoLTE by going to Settings > Cellular > Enable LTE Calling and tapping the toggle switch to turn it off on both devices (if necessary). This should fix most audio issues during a call, but it won't affect the ability to send and receive text messages over LTE. Check for a software update. If you're still having issues after trying everything above, check for a software update by going to Settings > General > Software Update and tapping Download & Install.
Check Signal Strength
The first thing you should do when your calls fail is to check your signal strength. When making a call, your iPhone will display an icon in the top-left corner of the screen that indicates how strong your connection is. If this icon isn't green or has a yellow exclamation mark next to it, then there's an issue with your connection. Try moving closer to a window or wall where there's better reception. If that doesn't help, check these other solutions below.
Now that you're aware of some potential solutions for getting a failed call message on your iPhone, you can try one or all of the options when a call fails to connect. Remember that you can always reset your settings if none of these solutions work. After all, if you've been using iOS for some time, it's easy to forget that Apple's mobile operating system is still very much a computer system at heart.