Is Wi-Fi Calling free internationally? What eight carriers charge, and the airplane mode trick
Whether Wi-Fi Calling is free abroad on Verizon, AT&T, T-Mobile, EE, Vodafone, Three, Telstra and Optus, the airplane mode trick, and use with a data eSIM.
· 9 min read
Sometimes. On the three big US carriers and Telstra, Wi-Fi Calling from abroad back to your home country costs nothing extra, as of September 2026. On EE and Vodafone UK, calls over Wi-Fi Calling abroad are charged at international rates, and Optus doesn't support Wi-Fi Calling while roaming at all. Calls to numbers outside your home country are almost never free, and a handful of countries block Wi-Fi Calling entirely.
So it's worth checking your own carrier before relying on it. Here's what each one publishes, and how Wi-Fi Calling fits with airplane mode and a data-only travel eSIM.
What Wi-Fi Calling actually does
Wi-Fi Calling lets your home line make and receive ordinary phone calls and texts over an internet connection instead of a mobile mast. To your carrier, the call arrives through its own network as if you were at home, which is why many carriers bill calls home as domestic.
It is not the same as WhatsApp or FaceTime. Those are apps that call other app users over data. Wi-Fi Calling uses your real phone number and reaches any phone, including landlines, which is why it matters for calling a bank, a doctor's surgery or a relative without a smartphone.
On iPhone, Wi-Fi Calling is set per line: Settings › Cellular › tap your home line › Wi-Fi Calling › Wi-Fi Calling on This iPhone. Your carrier may ask you to confirm an emergency address when you turn it on.
Carrier by carrier, as of September 2026
Taken from each carrier's own support pages. Policies change, so treat this as a starting point and check the linked carrier page before you go.
| Carrier | Works abroad? | Calls to home-country numbers | Calls to other numbers | Worth knowing |
|---|---|---|---|---|
| Verizon (US) | Yes | Free on unlimited talk and text plans | Your international long-distance plan or pay-as-you-go rates | On iPhone, it can't be switched on once you've left the US |
| AT&T (US) | Yes, in most countries | No additional charge | Billed by your roaming add-on; without one, per-minute rates apply | Blocked in China, Cuba, India, Iran, Israel, North Korea, Pakistan, Saudi Arabia, Sudan, Syria, Turkey, the UAE and Vietnam |
| T-Mobile (US) | Yes | No fees on unlimited plans, calls and texts both ways | Rates depend on plan and destination | Recommends airplane mode, then Wi-Fi and Wi-Fi Calling on, to avoid cellular charges |
| EE (UK) | Can work | Charged at EE's standard international rates | Charged at standard international rates | EE suggests turning Wi-Fi Calling off abroad to avoid the charges |
| Vodafone UK | Not supported while roaming | Where it does work, additional charges apply | Standard international rates | Roaming add-ons like EuroTraveller don't apply to Wi-Fi calls |
| Three UK | Unclear | Not confirmed | Not confirmed | Three's current roaming pages don't mention it; check with Three |
| Telstra (AU) | Yes | No additional charge to Australian numbers | Not available; use the mobile network at standard rates | Emergency calls over Wi-Fi Calling aren't supported outside Australia |
| Optus (AU) | No | Not applicable | Not applicable | Calls fall back to the roaming network at international roaming rates |
A few details behind the table:
- Verizon says calls and texts over Wi-Fi to US numbers don't count against your plan's allowance, and plays a voice prompt before any call that may carry international charges. Turn Wi-Fi Calling on before you leave the country.
- AT&T notes that US toll-free numbers often won't connect from abroad, and that calls to local numbers in the country you're visiting are billed as international long distance. Its own advice is to use Wi-Fi Calling only for calls to the US.
- T-Mobile warns that if Wi-Fi drops mid-call, the call can hand over to the cellular network and be charged. It also notes that a VPN routing you through another country can trigger international charges.
- Telstra says calls to destinations other than Australia aren't enabled over Wi-Fi Calling while you're overseas.
- Vodafone UK's terms state that Wi-Fi Calling while roaming "is prohibited and is not supported", and that where it does work, a call to a local number abroad is treated as a UK call to an international number.
Other carriers, including O2, Rogers, Bell and Telus, publish their own rules; search your carrier's site for "Wi-Fi Calling abroad".
The airplane mode + Wi-Fi trick
The idea is simple: turn on Airplane Mode, then turn Wi-Fi back on. Your phone stops talking to any foreign mobile network, so it can't roam, but Wi-Fi Calling can still carry calls and texts on your home number over the hotel or café Wi-Fi.
How to do it on iPhone:
- Before you travel, turn on Wi-Fi Calling for your home line (see the path above). Verizon customers must do this in the US.
- Abroad, open Control Centre and tap Airplane Mode.
- Tap the Wi-Fi icon to turn Wi-Fi back on, and join a network.
- Wait for your carrier's name to appear with "Wi-Fi" next to it in the status bar or Control Centre.
What it gets you: calls and texts on your usual number, over Wi-Fi, with no chance of roaming charges from the mobile network. T-Mobile recommends exactly this setup.
What it costs you:
- No mobile data anywhere else. Airplane Mode switches off every cellular line, including a travel eSIM. Once you leave the Wi-Fi, you're offline.
- Calls end when Wi-Fi ends. Walking out of range drops the call rather than handing it to a mobile network, which is the point, but also a nuisance.
- Location-based billing quirks. Telstra warns that if it can't tell where your phone is, for example because it's in Flight Mode, international calls may be charged based on your last known location.
- Emergency calls. Don't rely on Wi-Fi Calling for emergencies abroad. Telstra says emergency calls over Wi-Fi Calling aren't supported outside Australia, and Vodafone UK notes emergency services can't automatically find your location over Wi-Fi. Verizon notes that emergency calls try the cellular network first, even in Airplane Mode.
Wi-Fi Calling with a data-only travel eSIM
This is where most travellers end up: home line on for calls and texts, a travel eSIM for data. Wi-Fi Calling fits in two ways.
On Wi-Fi. Nothing changes. Your home line uses Wi-Fi Calling over the Wi-Fi network, as it would in Airplane Mode, but you keep the travel eSIM's data for when you walk out the door.
Off Wi-Fi. Apple's dual SIM documentation describes a line using Wi-Fi Calling over the other line's cellular data. In practice, with a supporting carrier, your home line can make and receive Wi-Fi Calling calls over the travel eSIM's data connection. That's useful on a carrier where Wi-Fi calls home are free, like the US carriers or Telstra. A few things to know:
- It's up to your carrier. Not every carrier enables Wi-Fi Calling over another line's data.
- Your home line may still register on a local network. With your home line switched on, calls can still arrive over the roaming network instead, and be charged as roaming. Check the status bar: if your home carrier's name doesn't show "Wi-Fi", the call isn't going over Wi-Fi Calling.
- It uses your travel data. Voice calls are light compared with video, but they count against your plan.
- Plan terms vary. Coverage and what's allowed depend on the local partner network, and some networks restrict voice-over-IP traffic. Where Cabin Mode knows of a restriction, the plan listing says so.
On EE, Vodafone UK and Optus, where Wi-Fi Calling abroad is either charged or unsupported, the simpler route is to make calls in WhatsApp or FaceTime over the travel eSIM's data, and keep the home line for receiving texts.
Worked example: a week in Japan
A US traveller on AT&T, in Tokyo for seven days, expecting a handful of short calls home each day.
| Setup | Extra cost for calls home |
|---|---|
| AT&T International Day Pass, used every day at $12 | $84 |
| Wi-Fi Calling on hotel Wi-Fi only | $0 in call charges, but no data outside the hotel |
| Travel eSIM for data (Japan 5 GB, 30 days, $5.40) plus Wi-Fi Calling | $5.40 for the data |
Cabin Mode prices checked 25 September 2026; they can change, and the app shows current prices in your currency. The day pass rate is AT&T's published price as of September 2026.
For an Australian on Optus, the same trip looks different: Wi-Fi Calling isn't available abroad, so calls home go over the roaming network at Optus's rates. The practical answer is a travel eSIM and calling home on WhatsApp or FaceTime. Japan 5 GB is about A$7.69 at the 24 September reference rate; Cabin Mode charges in the currency shown in the app.
Settings checklist before you fly
- Turn on Wi-Fi Calling for your home line at home: Settings › Cellular › home line › Wi-Fi Calling.
- Confirm your emergency address if your carrier asks.
- Install your travel eSIM and set it as the data line at Settings › Cellular › Cellular Data.
- Turn off Data Roaming on your home line. Wi-Fi Calling doesn't need it. Data roaming on or off with an eSIM goes through each switch.
- Check your carrier's international page for the country you're visiting, especially if it's on AT&T's blocked list.
For bank codes and texts on your home line, see keeping WhatsApp and bank codes abroad. For what US day passes cost if you do roam, see how to avoid roaming charges on iPhone. Plans by country are on the destinations page.
Frequently asked questions
Is Wi-Fi Calling free when I'm abroad?
It depends on your carrier and who you call. As of September 2026, Verizon, AT&T, T-Mobile and Telstra don't charge extra for Wi-Fi calls back to home-country numbers, on qualifying plans. EE charges its international rates, Vodafone UK doesn't support it while roaming, and Optus doesn't offer it abroad.
Does Wi-Fi Calling work in airplane mode?
Yes. Turn on Airplane Mode, then turn Wi-Fi back on, and Wi-Fi Calling can still carry calls and texts on your home number. You won't have mobile data anywhere outside Wi-Fi, including from a travel eSIM, until you turn Airplane Mode off.
Can I use Wi-Fi Calling with a travel eSIM?
Often, yes. On Wi-Fi it works as normal. Apple's dual SIM documentation also allows one line to use Wi-Fi Calling over the other line's cellular data, so your home line may be able to make Wi-Fi calls over the travel eSIM's data, if your carrier supports it.
Why doesn't Wi-Fi Calling work in some countries?
Some countries restrict it by law or regulation, and carriers block it there. AT&T, for example, lists China, India, the UAE, Turkey and Vietnam among countries where its Wi-Fi Calling isn't available. Use WhatsApp or FaceTime over data instead, where those apps are permitted.
Are calls to local numbers free over Wi-Fi Calling abroad?
Usually not. AT&T bills calls to local numbers in the country you're visiting as international long distance, and Telstra doesn't allow calls to non-Australian numbers over Wi-Fi Calling while overseas. For a local restaurant or hotel, a calling app or your hotel's phone is often cheaper.
Do I need Data Roaming on for Wi-Fi Calling?
No. Wi-Fi Calling uses Wi-Fi, or another line's data where your carrier supports it. Keep Data Roaming off on your home line to avoid roaming data charges.
Can I turn on Wi-Fi Calling after I arrive abroad?
On some carriers, no. Verizon says Wi-Fi Calling can't be activated on iPhone after you leave the US. Turn it on at home before you travel, whichever carrier you use.