How do I fix an iPhone that shows No Service and cannot make calls?
Answer
No Service on an iPhone is often a temporary radio or carrier registration issue. Toggling Airplane Mode, restarting, confirming Cellular is on, and checking for SOS or No SIM usually restores calling if the account and coverage are active.
Before you start: stop right away if…
- Stop if a website or popup asks you to pay to unlock phone service or install unknown software.
Follow these steps
Refresh the cellular radio
Open Control Center, turn Airplane Mode on for about 15 seconds, then turn it off and wait for signal bars or carrier name to return.
You should see: The status bar updates from No Service to a carrier name or signal indicator.
Restart the iPhone
Power the iPhone fully off, wait about 30 seconds, then turn it back on and check whether calls work.
You should see: After restart, the phone registers on the network or shows a clearer status message.
Confirm the cellular line is enabled
Go to Settings > Cellular and make sure Cellular Data and your phone line or plan are turned on. If you use Dual SIM, confirm the voice line you want is selected.
You should see: The intended line is enabled and available for calls.
Check for SOS or No SIM
Look at the top of the screen for SOS or No SIM. If you see No SIM with a physical SIM, reseat the card carefully; for eSIM, open Settings > Cellular and confirm the plan is installed and turned on.
You should see: You either restore a normal carrier status or identify a SIM/eSIM problem to report to the carrier.
Ask the carrier about outages or account status
If the phone still shows No Service after the steps above, contact your carrier through its official app or support site to check for a local outage, suspension, or provisioning issue.
You should see: The carrier confirms service status or provides a SIM/eSIM or account fix.
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Extra tips
What to look for: Status text such as No Service, SOS, or No SIM, and whether mobile data also fails away from Wi‑Fi
Before you change anything: Note the exact status-bar wording before changing settings. Check whether other phones on the same carrier work in your location. Confirm your carrier account is active and not suspended. Never share account passwords or one-time codes with unexpected callers claiming they can restore service.