Why does my iPhone show Call Failed when I try to make or receive calls?
Answer
Call Failed on iPhone usually points to a cellular signal, SIM/eSIM, network settings, or carrier outage problem rather than the Phone app itself. Check signal and Airplane Mode, restart the iPhone, update carrier settings, and contact the carrier if the status bar still shows no usable cellular service.
Before you start: stop right away if…
- Reset Network Settings removes saved Wi-Fi passwords and VPN configurations on the iPhone.
- Do not give carrier account PINs or one-time codes to anyone who calls you unexpectedly about Call Failed errors.
Follow these steps
Check signal and Airplane Mode
Swipe to Control Center, confirm Airplane Mode is off, and look at the status bar for cellular bars or No Service. Toggle Airplane Mode on for 15 seconds, then off again.
You should see: Cellular indicators return, or No Service remains and points to a SIM/network issue.
Restart the iPhone
Power the iPhone fully off, wait about 30 seconds, then turn it back on and try a call to a known number.
You should see: Calls connect, or Call Failed continues after a clean reboot.
Inspect SIM or eSIM status
Go to Settings → Cellular and confirm a plan is listed and turned on. For a physical SIM, power off and reseat the SIM; for eSIM, confirm the line shows active rather than missing.
You should see: Cellular plan appears active, or you see a clear SIM/eSIM error to give your carrier.
Update carrier settings and iOS if offered
Connect to Wi-Fi, open Settings → General → Software Update, install any iOS update, and accept a Carrier Settings Update popup if Apple/your carrier offers one.
You should see: The phone is current, and calling is retested afterward.
Reset Network Settings, then contact the carrier
If calls still fail, go to Settings → General → Transfer or Reset iPhone → Reset → Reset Network Settings. After the reboot, reconnect to Wi-Fi and test calling. If Call Failed continues, contact your carrier to re-provision the line or replace the SIM/eSIM.
You should see: Network settings clear and calls work, or the carrier confirms a line provisioning fix is needed.
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Extra tips
What to look for: The exact “Call Failed” message, cellular signal bars or “No Service,” whether Wi-Fi calling is on, and whether texts or mobile data still work.
Before you change anything: Note your carrier name and whether this is a physical SIM or eSIM. Confirm the phone is an iPhone and which iOS version is installed if easy to check. Back up the iPhone before a network settings reset if you rely on saved Wi-Fi passwords. Do not share account PINs or one-time codes with unexpected callers claiming they can “unlock” service.