iPhone Won’t Make Calls? Fix ‘Call Failed’ When You Have Signal
Bars showing but every call fails? Start with the cheap checks: Airplane Mode, a carrier update, the line your Dual SIM iPhone dials from, and Wi-Fi Calling.
When your iPhone won’t make calls even though bars are showing, Apple lists three possible causes: a setting, outdated software or a network problem. Work from the cheapest checks down; Reset Network Settings and your carrier come last.
Paths are for iOS 18 and later; on iOS 17 and earlier, use Settings > Phone. With UK, Australian or Indian English, Cellular may show as Mobile Service or Mobile Data, and Cellular Data Options as Mobile Data Options.
iPhone Won’t Make Calls? Read the Status Bar First
“No Service”, “Searching” or “SOS” in the status bar means no normal cellular connection; SOS (US, Canada and Australia) allows emergency calls only. Apple’s No Service and SOS guide covers that case. This one is for bars showing, but your iPhone won’t make calls.
| What happens | Likely cause | Go to |
|---|---|---|
| “Call Failed” on every number | Stuck network state, old carrier settings | Quick fixes |
| Fails only on home or office Wi-Fi | Wi-Fi Calling on a weak network | Wi-Fi Calling |
| Fails since a new SIM or eSIM | Wrong or inactive line | SIM and line |
| One contact fails, others connect | Old line on that contact, or Screen Time | SIM and line, settings |
| Fails only abroad | Roaming off on your plan, no VoLTE roaming locally, or Dial Assist | Carrier, settings |
| Calls connect but echo | Audio, not dialing | Phone echoing |
Then call a second number, such as a landline. If your iPhone won’t make calls to one number only, check that contact’s line (below); the fault may also be at their end. Apple also suggests trying another location.
Cycle Airplane Mode, Restart, Then Update Carrier Settings
Turn on Airplane Mode, wait at least 15 seconds, then turn it off. Still failing? Restart the iPhone.
Next, open Settings > General > About on Wi-Fi or cellular. If a carrier settings update is waiting, a prompt appears; tap Update. These updates can improve connectivity and Wi-Fi Calling support.
A mandatory update already installed; the version shows next to Carrier. After a SIM or eSIM switch, check here for the new carrier’s settings.
Then install any iOS update (Settings > General > Software Update). Still seeing “Call Failed”? Check the line next.
SIM, eSIM and Dual SIM: Check Which Line Places the Call
If your iPhone won’t make calls since a SIM change, start here. For a physical card, power off, eject the tray, reseat the card and power on. For an eSIM (not every iPhone has a tray), tap the line in Settings > Cellular and make sure Turn On This Line is on.
With two lines, the iPhone uses the line you last used with a contact and the default line for everyone else. An expired travel eSIM or an old carrier’s line can stay attached to one person, so calls to them fail.
- Set Settings > Cellular > Default Voice Line to your active line.
- Switch off Turn On This Line for any line you no longer need.
- For one call, tap the number near the top of the keypad screen and pick a line.
- For one contact, open their card, tap default and choose a line.
If your new iPhone won’t make calls, check that the transferred line shows as on in Settings > Cellular. Our guide to transferring an eSIM to a new phone covers the move itself.
Wi-Fi Calling and VoLTE: Why Full Bars Can Still Mean “Call Failed”
To see whether Wi-Fi Calling is in use, open Control Center: “Wi-Fi” after your carrier name means calls go over Wi-Fi (emergency calls use cellular when available). On a weak or restricted network, an iPhone won’t make calls reliably despite full bars. Apple’s Wi-Fi Calling troubleshooting page notes that not all Wi-Fi networks work with it.
To test, turn off Settings > Cellular > Wi-Fi Calling > Wi-Fi Calling on This iPhone (pick the line first on Dual SIM) and call over cellular. If that works, try another network or toggle the feature, waiting two minutes between steps as Apple suggests.
If Wi-Fi drops mid-call, the call moves to cellular over VoLTE, but only if VoLTE is available and on. On iPhone 11, SE (2nd generation) and earlier, set Settings > Cellular > Cellular Data Options > Enable LTE to Voice & Data, not Data Only. On 5G models, tap Voice & Data there and keep VoLTE on if shown. Apple says 5G iPhones aren’t affected by 3G shutdowns; options vary by model, carrier and region.
Phone Settings That Block Calls Without Warning
When an iPhone won’t make calls and shows no clear error, check these.
- Screen Time Communication Limits (Settings > Screen Time > Communication Limits). Often set on a child’s iPhone, they can be why an iPhone won’t make calls to anyone outside the allowed contacts. Blocked names show in red in Recents; emergency numbers still work.
- Default calling app (Settings > Apps > Default Apps > Calling). If calls fail from a third-party app set here, switch back to Phone.
- Dial Assist (Settings > Apps > Phone). It adds international or local prefixes. Abroad, turn it off and dial + and the country code.
- Date & Time. Not a documented cause, just a quick check after travel: Settings > General > Date & Time > Set Time Automatically.
- Call barring. International barring and spending caps sit on your carrier account, not in iPhone Settings.
If your iPhone won’t make calls or receive them, also check Do Not Disturb (Settings > Focus), Screen Unknown Callers set to Silence (Silence Unknown Callers on older iOS) and Blocked Contacts (Settings > Apps > Phone; iOS 26 and later also list it under Privacy & Security). These affect incoming calls only.
So does Call Forwarding (same menu): Apple’s call-failure checklist says to make sure it’s off, and a status-bar icon shows while it’s on. iPhone blocks links asking you to turn it on, a scammer trick, so switch off forwarding you didn’t set up.
Reset Network Settings When Your iPhone Won’t Make Calls
If your iPhone won’t make calls after every check above, Apple’s next step is this reset.
Saved Wi-Fi networks and passwords go, as do APN settings and any VPN not installed by a profile or MDM. The phone is renamed “iPhone”, manually trusted certificates become untrusted and roaming may turn off; photos and data stay. In the Reset list, don’t tap Delete All eSIMs (it deletes every eSIM), and on the screen before it, don’t tap Erase All Content and Settings.
Note your passwords
Write down Wi-Fi passwords and any manual VPN or APN details.
Open the Reset menu
Settings > General > Transfer or Reset iPhone > Reset.
Pick one option only
Tap Reset Network Settings and confirm.
Rejoin and retest
Rejoin Wi-Fi, turn roaming back on and test a call.
Android Phone Won’t Make Calls? The Dial-Out Checks
Paths are from Google’s Pixel and Samsung’s Galaxy help; other brands differ.
SIM on, and the right one
On a Pixel, turn on Use SIM in Settings > Network & internet > SIMs > your carrier, then under SIMs > Calls pick the active SIM or Ask every time.
Fixed Dialing Numbers
On Galaxy phones, FDN (Phone > More options > Settings > Supplementary services) limits calls out to a preset list. It needs your carrier’s PIN2; three wrong tries block PIN2 until you enter the carrier’s PUK2. The menu appears only if your SIM supports FDN.
Wi-Fi calling and VoLTE
Toggle Wi-Fi calling in the SIM’s settings and check VoLTE. No option may mean no carrier or model support.
Power off, then reset
Google suggests a 30-second power-off over a restart, then a mobile network reset in Settings > System > Reset options.
Switched carriers but kept your Galaxy? Samsung says to ask the new carrier to reprogram it. If incoming calls never ring, see our guide for an Android phone that won’t ring.
Frequently Asked Questions
Why does my iPhone say “Call Failed” when I have full bars?
When an iPhone won’t make calls with full bars, suspect Wi-Fi Calling on a weak network, an old or inactive line, or outdated carrier settings. The account may also not be set up for that iPhone.
My iPhone won’t make calls but receives them. Why?
Incoming calls prove the line has signal, so check what affects outgoing calls: the line set for that contact, Screen Time, Dial Assist and any third-party calling app. Then ask the carrier about a billing block or barring.
Can Wi-Fi Calling make my calls fail, and should I turn it off?
Yes, on a weak or restricted network, since calls go over Wi-Fi when it’s available. If your iPhone won’t make calls only on one network, turn Wi-Fi Calling off while you’re on it; if cellular is weak at home, it’s your workaround.
Still Failing? Call Your Carrier With These Questions
If your iPhone won’t make calls to any number even after the reset, call the carrier. Ask whether your account is set up for this iPhone, whether there’s an outage or a billing block, and whether you need a new SIM or eSIM. Abroad, also ask: is international roaming, including VoLTE roaming, active for this country?
If a SIM that works in another phone fails in yours, the iPhone itself may need repair; on iOS 18 and later, the Apple Support app can run extra diagnostics first. More fixes are in our mobile guides.
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