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A free scan shows the junk files, broken settings and background clutter dragging Windows down - then fixes them in one click.Free scan · Windows 10 & 11If your iPhone has no service, first try reconnecting it, then check for updates and make sure the correct SIM or eSIM line is enabled. “No Service” or “Searching” means the iPhone is not connected to a cellular network. “SOS” or “SOS only” means it cannot connect to its own carrier, although emergency calls through other networks may still be possible in Australia, Canada, and the United States.
1. Try a quick reconnect and restart
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Turn on Airplane Mode, wait at least 15 seconds, then turn Airplane Mode off.
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Restart your iPhone.
These steps can help the phone reconnect when a cellular network is available. They will not fix a carrier outage or an account problem.
2. Check for iOS and carrier settings updates
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Install any iOS update available for your iPhone.
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If you can connect to Wi-Fi, open Settings > General > About and wait for a prompt to update carrier settings. If an update is offered, follow the on-screen instructions. A newly inserted SIM may need updated carrier settings to connect.
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Apple’s instructions note that menu wording can vary with region and software version, so follow the labels shown on your device.
3. Make sure the correct SIM or eSIM line is active
Open Settings > Cellular and check that the line you intend to use appears and is turned on. On a Dual SIM iPhone, tap the relevant line to inspect its status.
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If the line is missing, contact your carrier about eSIM provisioning or insert the physical SIM for that line.
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If you use a physical SIM, remove and reinsert it. Ask the carrier about a replacement if the SIM is damaged or does not fit the tray properly.
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Do not delete an eSIM as a routine troubleshooting step; contact your carrier if the eSIM line is absent or cannot be enabled.
4. Ask your carrier to check the account and network
Your carrier can access account and network details that are not available from the iPhone alone. Ask it to verify the following:
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Your account is active and in good standing.
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Your location has coverage and is not affected by an outage.
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Your iPhone or line is not blocked or barred from cellular service.
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Your plan is correct for the line and device.
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If the phone was purchased outside your country or region, whether local IMEI registration is required.
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5. If you are traveling internationally
For the line you are using, check that Cellular Data is enabled and Data Roaming is on under Settings > Cellular > Cellular Data Options. Roaming availability, plan coverage, and charges depend on your carrier and plan; ask the carrier to confirm those details.
6. Identify who can check likely causes
| Possible cause | Who can verify or address it | Useful next check |
|---|---|---|
| Coverage gap or carrier outage | Carrier | Ask about local coverage and current outages. |
| Inactive account, incorrect plan, or blocked device | Carrier | Ask the carrier to verify account standing, plan, and device eligibility. |
| Disabled or missing cellular line | You in Settings; carrier if provisioning is needed | Check that the intended line appears and is enabled; contact the carrier if it is absent. |
| Physical SIM not seated or damaged | You can reseat it; carrier handles replacement | Remove and reinsert the SIM; ask for a replacement if it is damaged or ill-fitting. |
| Missing carrier settings or outdated iOS | You, using Wi-Fi if needed | Check Settings > General > About and install available iOS updates. |
| Suspected hardware issue after carrier checks | Apple or a service provider | Arrange service if the carrier rules out account and network causes. |
7. When to seek device service
If the carrier confirms there is no account or network issue and suspects a hardware problem, arrange service with Apple or a service provider. The status message alone does not identify a particular failed component.
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For Apple’s full troubleshooting guidance, see If you see SOS, No Service, or Searching on your iPhone or iPad.
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