Free Calling Apps That Work Abroad — What Actually Works and What Doesn't
Which free calling apps work outside the US without a data plan
WhatsApp, Viber, and Google Meet all make calls over WiFi or mobile data from abroad, and they work on both iPhone and Android. You do not need a local SIM card or a phone plan in the country you are visiting. The person you call needs the same app installed, and both of you need an internet connection — WiFi at a café or hotel, or a data plan through your US carrier or a local prepaid SIM.
Skype and Facebook Messenger also work this way, though they are less reliable on slow connections. Telegram offers calling too, but it is less common outside tech communities, so fewer people you know will have it installed already.
The catch: these apps do not work for calling regular phone numbers. If you need to reach a landline, a business, or someone without the app, you will need a different solution — either a local SIM card with minutes, a calling card, or a service like Google Voice that converts internet calls to regular phone numbers.
Key Takeaways
- WhatsApp, Viber, and Google Meet let you call anyone with the same app installed over WiFi or data, with no phone plan required.
- These apps work only between app users — you cannot call a regular phone number, business, or landline through them.
- You need either WiFi or a data connection, which means either finding free WiFi or buying a local prepaid SIM card with data.
- Google Voice can forward calls to a regular phone number abroad, but it requires a US phone number and works best with data or WiFi calling.
- Calling rates and reliability vary by country; some nations block or throttle certain apps, so test your connection before you need it.
How to set up a free calling app before you leave
Download the app to your phone now, before you travel. Create an account using your US phone number or email address — do this at home on your regular WiFi so you are not scrambling at the airport. For WhatsApp and Viber, the app will send a verification code to your phone number; make sure you can receive texts before you leave.
Tell the people you plan to call that you will be using the app while abroad. Send them a message through the app from home so they have your contact saved and know to expect calls that way. This matters because if someone does not recognize the app notification, they may not answer.
Test a call on your home WiFi before departure. Call a friend or family member using the app and listen for audio quality, delays, and whether the connection drops. If it does not work smoothly at home, it will not work better abroad.
Getting data or WiFi while traveling
Most free calling apps need either WiFi or a mobile data connection. In cities and tourist areas, you can usually find free WiFi at hotels, cafés, libraries, and restaurants — ask for the password when you arrive. Many airports and train stations also offer free WiFi, though it may be slow or require you to watch an ad first.
If you want data on the go, buy a prepaid SIM card at the airport or a local mobile shop when you land. Costs vary widely by country — in some places a week of data costs $5 to $15, in others it is more. You insert the local SIM into your phone, and your US number stops working until you put your original SIM back in. Some phones let you use two SIM cards at once (eSIM and physical SIM), which means you can keep your US number active and receive calls and texts on it while using local data.
Before you buy a local SIM, check whether your phone is unlocked. If your phone is locked to your US carrier, you cannot use a different SIM card. Call your carrier before you travel and ask them to unlock it — this is free and takes a few minutes.
Countries where certain apps are blocked or slow
Some countries restrict or block certain calling apps. China blocks WhatsApp, Viber, and most VPNs, though Skype sometimes works. Russia has slowed WhatsApp and Telegram at times. Iran blocks WhatsApp and Telegram. The restrictions change, and enforcement varies by region and time.
If you are traveling to a country known for app restrictions, research before you go. Check recent travel forums or contact your hotel to ask what apps work there. Download a VPN app to your phone before you leave the US — a VPN can sometimes bypass blocks, though using one may violate local law in some countries, so understand the rules where you are going.
Even where apps are not blocked, internet speed matters. In rural areas or during peak hours, connections may be too slow for calling. Video calls use more data and are more likely to fail than voice calls, so stick to voice if your connection is weak.
Using Google Voice to call regular phone numbers from abroad
Google Voice is a US phone number that forwards calls and texts to your real phone. If you set it up before you travel, you can use it to call regular phone numbers (not just app users) from abroad over WiFi or data. You dial the number through the Google Voice app or website, and it routes the call through the internet instead of using your phone's cellular connection.
To use Google Voice abroad, you need a US Google Voice number already set up — you cannot create one from outside the US. If you do not have one, set it up at voice.google.com before you leave. You will need a US phone number to verify it (your regular cell phone works). Once it is set up, you can use it from anywhere.
Calling rates through Google Voice vary. Calls to US numbers are free. Calls to other countries cost money — rates are listed on the Google Voice website and are usually cheaper than international calling plans, but not free. You pay as you go from a Google account balance, or you can set up a monthly plan.
Comparing free calling apps side by side
| App | Call other app users | Call regular phone numbers | Works without data plan | Most common outside US |
|---|---|---|---|---|
| Yes | No | WiFi only | Yes — very widely used | |
| Viber | Yes | No | WiFi only | Yes — popular in Europe and Asia |
| Google Meet | Yes | No | WiFi only | Less common; mostly for video |
| Skype | Yes | Yes (paid) | WiFi only | Declining; less common now |
| Google Voice | Yes | Yes (free to US, paid elsewhere) | WiFi only | US-only number; not useful abroad for local calls |
What to do if you cannot find WiFi or data
If you are in a remote area or a place where internet is unreliable, free calling apps will not work. Your options are a local prepaid phone plan with minutes (buy a SIM card and add credit), an international calling card (buy a card with a PIN and dial a number to use it), or asking your US carrier about a temporary international plan.
International calling cards are sold at convenience stores, supermarkets, and online in most countries. You scratch off a PIN, dial a toll-free number, enter the PIN, and then dial the number you want to call. Rates vary, but they are often cheaper than carrier plans. The downside is that the card may expire if you do not use it, and some cards have hidden fees or poor connection quality.
If you are only traveling for a few days and do not need to call often, asking your US carrier about a short-term plan might be simpler than juggling apps and WiFi. Costs vary by carrier and destination, so compare before you leave.
Frequently Asked Questions
Do I need to pay anything to use WhatsApp or Viber to call abroad?
No. WhatsApp and Viber are free to download and free to use for calls and messages. You only pay for the internet connection — either WiFi or a data plan. There are no hidden fees or subscription charges for the apps themselves.
Can I receive calls on a free calling app if I do not have data?
No. You need an active internet connection (WiFi or mobile data) to receive calls on these apps. If you are offline, the call will not come through. You can receive text messages on the app when you reconnect, but not live calls.
What happens to my US phone number when I use a local SIM card abroad?
Your US number stops working while the local SIM is in your phone. Calls and texts to your US number will not reach you. When you put your original SIM back in, your US number works again. If you have a phone with eSIM support, you can keep both active at the same time.
Is it safe to use free WiFi to make calls abroad?
Free WiFi is convenient but not encrypted, so someone on the same network could potentially intercept your data. WhatsApp and Viber encrypt calls end-to-end, which means the content is scrambled even over unencrypted WiFi. Still, avoid logging into bank accounts or entering passwords on public WiFi. Use a VPN if you are concerned about privacy.
Will a free calling app work if my phone is locked to my US carrier?
Yes, as long as you have WiFi or data. A locked phone means you cannot use a different SIM card, but you can still connect to WiFi and use calling apps. If you want to buy a local SIM card for data, you will need to unlock your phone first — call your carrier before you travel.