WiFi Calling lets a supported Android phone make and receive normal carrier calls over a Wi-Fi connection when cellular coverage is weak or unavailable.
You still use your regular phone number and Phone app. The main difference is that the call can travel over Wi-Fi instead of relying entirely on the nearby mobile tower.
The feature depends on three things:
- your mobile carrier;
- your phone model;
- your SIM or eSIM being provisioned for WiFi Calling.
If any of those do not support it, the option may be missing.
Turn On WiFi Calling on Google Pixel
On a current Pixel phone:
- Open Settings.
- Tap Network & internet.
- Tap SIMs.
- Select your carrier SIM if you use more than one.
- Tap Wi-Fi calling.
- Turn on Use Wi-Fi calling.
Google currently documents this as the standard route on Pixel and other phones using its network settings.
If the option is missing completely, check with your carrier before changing unrelated Android settings.
Turn On WiFi Calling on Samsung Galaxy
On a Samsung Galaxy phone:
- Open Settings.
- Tap Connections.
- Tap Wi-Fi Calling.
- Turn the switch on.
Samsung also provides another route on many Galaxy phones:
Phone > More options > Settings > Wi-Fi calling
Some models also include a Wi-Fi Calling button in Quick Settings.
Samsung states that the phone must be connected to Wi-Fi and have active service through a SIM or eSIM.
Complete the Emergency Address if Asked
Some carriers require an emergency-service address before WiFi Calling activates.
You may see wording such as:
- Emergency Address;
- Emergency Location;
- E911 Address;
- Update Emergency Address.
Enter your current valid address and follow the carrier’s instructions.
This matters because a Wi-Fi call may not provide the same location information as a traditional cellular call.
Samsung’s current guidance specifically tells users to update their Emergency Address when required.
Do not skip the address screen if activation keeps returning to it.
How to Know WiFi Calling Is Working
After enabling it, connect to a stable Wi-Fi network and make a normal phone call.
Depending on the phone and carrier, you may see:
- Wi-Fi Calling;
- Wi-Fi Call;
- Internet Call;
- a Wi-Fi phone icon;
- your carrier name followed by Wi-Fi.
The indicator may appear in:
- the status bar;
- Quick Settings;
- the call screen;
- notifications.
You do not need a separate calling app.
Use the normal Phone app and dial as usual.
Does WiFi Calling Work When Cellular Signal Is Still Available?
Yes, but the phone may not always use Wi-Fi.
Android and the carrier can choose between Wi-Fi and cellular service depending on:
- signal strength;
- carrier rules;
- your calling preference;
- roaming settings.
Some phones expose options such as:
- Wi-Fi preferred;
- Mobile network preferred;
- Roaming network preference.
Samsung currently lets supported devices choose a calling preference when the carrier allows it.
If your phone keeps choosing cellular even with Wi-Fi available, that does not automatically mean WiFi Calling is broken.
Test WiFi Calling With Airplane Mode
Airplane mode can be a useful test.
- Turn on Airplane mode.
- Manually turn Wi-Fi back on.
- Connect to a stable Wi-Fi network.
- Wait for WiFi Calling to register.
- Make a test call.
If the call works, the phone and carrier can use WiFi Calling.
Do not use this as a permanent setup if you need ordinary cellular service at the same time.
If the call fails or WiFi Calling refuses to register, use How to Fix WiFi Calling Not Working on Android instead of repeatedly toggling unrelated settings.
Why Is WiFi Calling Missing?
A missing option is usually different from a visible option that does not work.
Common reasons include:
- your carrier does not support WiFi Calling;
- your plan does not include it;
- the carrier has not provisioned your SIM or eSIM;
- the phone model is not approved by the carrier;
- the device was imported from another region;
- the software build does not expose the carrier feature.
Google states that if the WiFi Calling option is not available, carrier support is one of the first things to check.
Ask your carrier whether WiFi Calling is provisioned for your line and exact phone model.
That is more useful than asking only whether the carrier supports WiFi Calling in general.
Can You Use WiFi Calling Without Mobile Signal?
Yes, when your carrier supports it and the feature has already been activated.
That is one of the main reasons to use WiFi Calling.
It can help in places such as:
- buildings with weak indoor coverage;
- basements;
- rural areas with good broadband but poor mobile signal;
- offices where mobile reception is weak.
You still need a working Wi-Fi internet connection.
A phone showing the Wi-Fi icon does not guarantee the connection has usable internet.
If Android is connected to Wi-Fi but websites will not load, see Wi-Fi Connected but No Internet on Android.
Does WiFi Calling Use Mobile Data?
Normally, WiFi Calling uses the connected Wi-Fi network for the call path.
That does not mean every background service on the phone stops using mobile data.
The phone can still use cellular data for other apps depending on your settings.
If you want to test WiFi Calling without cellular data interfering, Airplane mode with Wi-Fi manually re-enabled is useful.
Is WiFi Calling Free?
WiFi Calling itself does not automatically make every call free.
Your carrier controls billing.
A call made over Wi-Fi may still be charged according to your normal voice plan, especially when:
- calling an international number;
- roaming;
- using a carrier with special WiFi Calling rules.
Google advises users to check with their mobile provider for possible charges.
Do not assume that using Wi-Fi makes an international call free.
WiFi Calling While Traveling Abroad
International use varies considerably between carriers.
Before relying on it outside your home country, check:
- whether your carrier permits WiFi Calling abroad;
- whether calls to your home country are billed normally;
- international-call rates;
- roaming rules;
- emergency-call limitations.
Some carriers treat WiFi Calling abroad differently from domestic use.
Others may restrict it completely.
Check the carrier’s current rules before traveling.
Does WiFi Calling Work With Dual SIM?
It can, but each line may need separate support and activation.
On a dual-SIM Android phone, confirm:
- which SIM is selected for calls;
- which SIM has WiFi Calling enabled;
- whether both carriers support the feature;
- whether both lines are correctly provisioned.
On Pixel, open:
Settings > Network & internet > SIMs
Then select each line separately.
On Samsung, WiFi Calling controls can also vary by SIM and carrier.
If one line works and the other does not, compare the carrier support before treating it as a phone problem.
Does WiFi Calling Work With SMS?
Support for SMS and MMS over Wi-Fi depends on the carrier and device.
Samsung describes WiFi Calling as supporting calls and messages with participating carriers.
Do not assume every carrier handles SMS over Wi-Fi in exactly the same way.
If normal text messages are not arriving even when mobile service is available, use Not Receiving Text Messages on Android.
WiFi Calling vs WhatsApp or Messenger Calls
They are different.
WiFi Calling uses your mobile carrier and normal phone number.
WhatsApp, Messenger, Signal, Telegram, and similar services use their own internet-calling systems.
With WiFi Calling:
- callers use your normal number;
- you use the normal Phone app;
- carrier billing and rules can still apply.
With an app call:
- both sides usually need the same app;
- the call uses that service’s internet infrastructure;
- your carrier’s WiFi Calling feature is not required.
Does WiFi Calling Improve Call Quality?
It can when your mobile signal is weak and the Wi-Fi connection is stable.
But Wi-Fi speed alone does not guarantee good call quality.
Calls can still suffer from:
- high latency;
- packet loss;
- overloaded Wi-Fi;
- unstable mesh roaming;
- weak Wi-Fi signal;
- VPN or firewall interference.
If WiFi Calling sounds worse on one network but works normally elsewhere, the Wi-Fi network is more likely to be the problem.
Can WiFi Calling Drain the Battery?
WiFi Calling is not usually a major battery drain by itself.
Battery use depends more on:
- Wi-Fi signal strength;
- cellular signal conditions;
- call duration;
- background apps;
- screen use.
A phone constantly searching for weak cellular service can also consume extra power.
If battery life is poor throughout the day, see Why Your Android Battery Drains Fast instead of blaming WiFi Calling alone.
Keep the Phone and Carrier Settings Updated
Install current Android or Samsung software updates.
Also keep carrier-related components and the Phone app updated where applicable.
Updates can affect:
- carrier provisioning;
- IMS registration;
- calling preferences;
- SIM behavior;
- WiFi Calling compatibility.
If the feature worked before an update but now fails, use the dedicated WiFi Calling Not Working on Android troubleshooting guide.
When WiFi Calling Is Worth Using
WiFi Calling is most useful when:
- cellular reception is weak indoors;
- home or office Wi-Fi is stable;
- your carrier fully supports the feature;
- you want to keep using your normal number and Phone app.
The key limitation is carrier support.
Android can provide the setting, but your mobile provider still controls whether the feature is available for your account, SIM, phone model, region, and plan.
Once it is enabled and registered, using it is simple: stay connected to a reliable Wi-Fi network and place calls normally.
