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Outbyte PC Repair FREEClear out junk files and repair common Windows errorsFree Scan →Outbyte Driver Updater FREEFix the driver behind crashes, sound loss and screen glitchesFind Drivers →If your iPhone has lost Wi-Fi or cellular service, first work out whether the fault is on the phone, one Wi-Fi network, or your carrier. Check the connection, compare other devices, and restart before using Reset Network Settings. That reset does not erase personal content, but it removes saved network configurations, so you will need to reconnect to Wi-Fi.
First identify what is failing
Look at the exact message and test the connection’s scope. A problem on one iPhone points to a different next step than a problem affecting every device on a home network. “SOS,” “No Service,” and “Searching” indicate a cellular issue; “No Internet Connection” on Wi-Fi may point to the router, network, or internet provider rather than the iPhone’s Wi-Fi radio.
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- Only this iPhone has trouble on one Wi-Fi network: start with the iPhone checks below, then inspect the router or ask its administrator.
- Several devices cannot get online on the same Wi-Fi: investigate the router or contact the internet service provider (ISP).
- The iPhone cannot connect to any Wi-Fi network: after basic checks, contact Apple Support.
- The status bar says “SOS,” “No Service,” or “Searching”: follow the cellular steps below and contact your carrier if service does not return.
Apple’s advice for Wi-Fi trouble is direct: “Reset network settings only if other solutions fail.” Apple’s Wi-Fi troubleshooting steps recommend trying simpler checks first.
Try the reversible Wi-Fi checks first
- Open Settings > Wi-Fi. Make sure Wi-Fi is on and tap the network you want to join.
- Open Settings and check that Airplane Mode is off.
- If the Wi-Fi control is dimmed, restart the iPhone, then check Wi-Fi again.
- If the iPhone says “No Internet Connection,” test another device on the same network. If that device also cannot get online, the issue may be with the network or ISP rather than the iPhone.
- Try the iPhone on a different Wi-Fi network, such as one you are authorized to use in another location. If it cannot connect to any Wi-Fi network, contact Apple Support.
When only one Wi-Fi network is affected
If other devices also fail on that network, or the iPhone works on another Wi-Fi network, check the router and internet connection. If you do not manage the network, ask its administrator or contact the ISP rather than changing settings you do not control.
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- Confirm the router is powered on and the iPhone is within range.
- If the router offers another supported frequency, try connecting to that network or band.
- Check whether router firmware needs an update.
- Restart the router and modem, following the provider’s instructions if available.
Check VPN or security software by testing it
A VPN or security app is one possible factor, not a cause to assume. Apple advises uninstalling the software, restarting the iPhone, and testing Wi-Fi. If you rely on the software, contact its provider or your organization’s VPN administrator for help before deciding whether to keep it removed.
For “SOS,” “No Service,” or “Searching”
- Turn Airplane Mode on, wait at least 15 seconds, then turn it off.
- Restart the iPhone and check whether cellular service returns.
- If the status remains “SOS,” “No Service,” or “Searching,” contact your carrier to check the account and service. The carrier is the appropriate contact for coverage or account issues.
See Apple’s cellular service troubleshooting guidance for additional steps.
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Reset Network Settings only after those checks fail
If Wi-Fi troubleshooting has not resolved the problem, use the specific network-reset option: Settings > General > Transfer or Reset iPhone > Reset > Reset Network Settings. Apple’s menus can vary by device or iOS version. Read the option name carefully and select Reset Network Settings, not Reset All Settings or Erase All Content and Settings.
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What the reset changes—and what it does not
Apple’s iPhone User Guide says that Reset Network Settings removes network settings, including saved Wi-Fi networks and passwords. It also removes previously used VPN settings that were not installed through a configuration profile or MDM. Wi-Fi turns off and back on, disconnecting the iPhone from its current network.
The reset does not erase personal content or media such as photos, messages, and apps. Other effects noted in Apple’s guide include the device name reverting to “iPhone,” manually trusted certificates becoming untrusted, and cellular data roaming being turned off. Managed VPN or MDM settings are governed by the organization’s profile and may require an administrator.
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These options are not interchangeable. Reset All Settings is broader: it changes settings such as privacy, location, keyboard, and Apple Pay settings, but does not delete data or media. Erase All Content and Settings is a separate action that removes content. Apple describes the distinctions in its May 21, 2026 guidance on clearing iPhone data.
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Repair Windows errors before they cause bigger problemsFix Now →Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →Clear out junk files and repair common Windows errorsFree Scan →Choose the right support contact if the problem remains
- Wi-Fi fails only on one network or affects several devices: contact the ISP or the network administrator.
- The iPhone cannot connect to any Wi-Fi network: contact Apple Support.
- Cellular still shows “SOS,” “No Service,” or “Searching”: contact the carrier.
- A school or workplace manages the iPhone or network: consult IT before resetting network settings.
A reset cannot identify whether a particular carrier, ISP, or router is having an outage. If the iPhone appears connected to Wi-Fi but still cannot reach the internet, compare other devices on that same network and contact the ISP if the problem is widespread.
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