How do I fix Call Failed when a cell phone will not complete calls?
Answer
Repeated Call Failed messages usually point to a temporary cellular registration or carrier-settings problem. Refreshing the radios with Airplane Mode, confirming Cellular is on, and allowing carrier settings to update often restores calling.
Follow these steps
Refresh cellular radios
Turn Airplane Mode on for about 15 seconds, then turn it off and wait until the carrier name or signal indicators return.
You should see: The phone re-registers on the network and is ready for a test call.
Confirm Cellular is enabled
Go to Settings, then Cellular, and make sure Cellular is turned on. If Dual SIM is used, confirm the intended line is enabled for voice calls.
You should see: Cellular remains on and the correct line is selected for calling.
Check for carrier settings updates
Go to Settings, then General, then About, and stay on that screen for about 30 seconds. If a Carrier Settings Update prompt appears, install it.
You should see: Either a carrier update installs, or the About screen shows carrier information without errors.
Wait for the signal to settle
Stay in one location for 1 to 2 minutes after the refresh so the phone can finish attaching to voice service.
You should see: Signal status stabilizes and the phone is ready for another call attempt.
Place one test call
Try one outgoing call to a known working number. If it still fails on multiple phones, contact the carrier about a local outage or account provisioning issue.
You should see: The call connects normally, or you can report a clear ongoing Call Failed result to the carrier.
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Extra tips
What to look for: An on-screen Call Failed message, calls that connect briefly then drop, or signal bars that look normal while voice calls still fail.
Before you change anything: Check whether Wi-Fi calling or Wi-Fi data still works. Note whether one phone or several phones on the same carrier are affected. Avoid a factory reset until network refresh steps are tried. Never share account passwords or one-time codes with unexpected callers.