How to Make Free International Calls Using WiFi

WiFi Calling Basics

Making an international call over WiFi means sending voice traffic over an internet connection (Wi-Fi or mobile data) instead of using traditional cellular voice minutes. You can do this two main ways:

• Built-in Wi‑Fi Calling: Your iPhone or Android phone routes a call through your mobile carrier over Wi‑Fi while keeping your regular phone number. Carriers may treat these calls like normal cellular calls for billing. Whether you can place international calls over Wi‑Fi depends on your carrier’s policy and plan.
• VoIP apps: Third‑party apps (Skype, WhatsApp, Telvio, etc.) send voice data directly over the internet. App-to-app calls are usually free. Calls from an app to a real phone number (landline or mobile) typically incur a low per‑minute fee.

Which one to pick depends on what you need. If you want to call a friend who also has the same app, an app-to-app voice call is simplest and free. If you must call a landline or someone without the app, use a VoIP service that supports calling phone numbers. That’s the most practical way to make international calls over WiFi without using cellular minutes.

Key terms to remember:

• International call over wifi: calling a number in another country using a Wi‑Fi data connection.
• iPhone Wi‑Fi Calling international: Apple’s built‑in feature; availability and charging depend on your carrier.
• VoIP (Voice over Internet Protocol): the technology behind most internet calls.

For more on app-to-app options, see our guide to free online video calling platforms.

Devices Supporting WiFi International Calls

Most modern devices work for Wi‑Fi international calls. Here’s what supports each approach:

• iPhone (iOS)
  • Built‑in Wi‑Fi Calling: Available on most carriers and iPhone models. Enable in Settings > Phone > Wi‑Fi Calling. If you’re wondering how to call international on Wi‑Fi with an iPhone, first confirm your carrier supports international destinations over Wi‑Fi.
  • VoIP apps: FaceTime Audio, WhatsApp, Skype, Telvio and others work on iPhone.
• Android phones
  • Built‑in Wi‑Fi Calling: Many Android phones support this. Path varies by manufacturer (typically Settings > Network & internet > Mobile network > Advanced > Wi‑Fi Calling).
  • VoIP apps: Most Android phones run the same VoIP apps as iPhone.
• Tablets, laptops, and desktops
  • App‑based calls: Apps like Skype, WhatsApp Desktop, and web‑based services let you place calls from non‑phone devices.
• Smart speakers and VoIP adapters
  • Some adapters let you connect a regular phone to your home internet and place VoIP calls.

If you need virtual numbers or a dedicated VoIP setup, check our guides on virtual phone numbers and free virtual phone numbers for details on routing and numbers by country.

When you search “can you make international calls on Wi‑Fi,” the short answer is yes — provided the device and service support it. If you want to call an actual phone number (not app‑to‑app), use a VoIP service that offers calls to landlines and mobiles.

Best Apps for WiFi International Calling

Choose the app based on who you call (app users vs phone numbers), cost, and call quality.

Free app-to-app voice options (no cost between users):

• WhatsApp: Wide global reach, reliable audio. Good for informal calls to other WhatsApp users.
• FaceTime Audio: Excellent audio quality for Apple users. Works only between Apple devices.
• Facebook Messenger and Telegram: Cross‑platform for quick voice calls.
• Google Meet/Hangouts: Good for scheduled calls or group calls.

Apps that call real phone numbers (low cost):

• Skype: Calls to phones cost per minute; subscription plans available.
• Google Voice: Available in some countries; charges vary.
• Rebtel and similar services: Offer local routing and often flat rates.
• Telvio: VoIP app for iPhone and Android that calls real phone numbers in 200+ countries using Wi‑Fi or mobile data. Rates start at $0.02/min to the US and $0.08/min to India; per‑second billing with no connection fees. Telvio requires no registration, credits never expire, and you get 1 free minute on first install.

How to pick:

• If the person you call uses the same app, use an app‑to‑app option for free calling.
• If you need to call landlines or mobiles, pick a VoIP app that supports the destination country and displays transparent rates. For a breakdown of VoIP fundamentals, see our guide to VoIP phone services explained.

Avoid apps that hide fees or require complicated setup if you need simple international calling over Wi‑Fi.

Step-by-Step WiFi Call Setup

Below are practical steps for three common scenarios: (A) iPhone built‑in Wi‑Fi Calling, (B) Android built‑in Wi‑Fi Calling, and (C) VoIP app calling a phone number.

A. Enable Wi‑Fi Calling on iPhone

1. Confirm carrier support: Contact your carrier or check its website to confirm international calling over Wi‑Fi and any charges.
2. Connect to Wi‑Fi: Make sure your iPhone is on a stable Wi‑Fi network.
3. Turn on Wi‑Fi Calling:
   • Open Settings > Phone > Wi‑Fi Calling.
   • Toggle on “Wi‑Fi Calling on This iPhone.”
   • You may need to enter an emergency address for E911 services.
4. Make a call: Dial as usual. If Wi‑Fi Calling is active, the status bar will show “Wi‑Fi” next to the carrier name.

B. Enable Wi‑Fi Calling on Android (general)

1. Confirm carrier and device support.
2. Connect to Wi‑Fi.
3. Open Settings:
   • Settings > Network & internet > Mobile network > Advanced > Wi‑Fi Calling. (Paths vary by brand and Android version.)
4. Toggle Wi‑Fi Calling on and enter any required address for emergency services.
5. Place the call. The phone will route via Wi‑Fi when cellular coverage is weak.

Notes:

• Even with Wi‑Fi Calling enabled, carriers may bill international calls at their standard rates. Check your plan.
• If you can’t find the option, your carrier might not support it on your plan or device.

C. Use a VoIP app (call a phone number)

1. Choose an app: Install a VoIP app that supports calling phone numbers (for example, Telvio, Skype, or others).
2. Install and grant permissions: Allow microphone and network access.
3. Buy credit or subscription if needed: Many services work on credit packs or per‑minute charges. Example: Telvio credit packs start at $1.99 (Starter), $4.99 (Standard), $9.99 (Pro); credits do not expire.
4. Dial format: Always use the international format: + [country code] [national number]. Example: to call London 020 7123 4567 dial +44 20 7123 4567.
5. Make the call: Tap dial. App will route voice over Wi‑Fi or mobile data to the destination phone number.
6. Monitor usage: Many apps show call duration and price while you talk. Telvio bills per second and has no connection fees, so you pay only for the time you use.

Quick example: Call a U.S. number from abroad using Telvio

• Open Telvio, enter +1 followed by the U.S. number, and dial. With rates from $0.02/min to the U.S., a 10‑minute call costs around $0.20.

If you need to compare call services or learn more about calling internationally, see our guide on how to make international calls.

Tips for High-Quality International Calls

Good wi‑fi call quality depends on network, device, and app settings. Use these practical tips to reduce drops, latency, and poor audio.

1. Use a strong, low‑latency connection

   • Aim for at least 100 kbps (0.1 Mbps) upload and download per simultaneous voice call. For higher quality or group calls, aim for 300–500 kbps.
   • Keep latency under 150 ms if possible. Ping above 200 ms can cause delays.
   • Use a 5 GHz Wi‑Fi band or wired Ethernet for the best stability.

2. Reduce network congestion

   • Pause large downloads, streaming video, and backups while on a call.
   • If multiple people share a home network, schedule calls when traffic is low or enable Quality of Service (QoS) on your router to prioritize voice traffic.

3. Use a good microphone and headset

   • Wired or Bluetooth headsets reduce echo and keep your voice clear.
   • Use headsets with noise cancellation in noisy environments.

4. Close background apps and updates

   • Apps that stream video or sync large files can steal bandwidth and CPU. Close them before a call.
   • Turn off automatic OS updates during important calls.

5. Avoid VPNs when possible

   • VPNs add extra routing and may increase latency and jitter. Disable VPNs if call quality is poor, unless you need them for privacy.

6. Check app and device settings

   • Allow microphone access and background activity for your calling app.
   • Keep the app updated. Codec improvements in updates often improve call quality.

7. Test before important calls

   • Place a short test call to verify voice clarity and connection stability.
   • Many apps offer a test or echo number to check audio.

8. Dial correctly for international numbers

   • Always include the plus sign (+) and country code to avoid failed calls.
   • Example: +91 98765 43210 for an Indian mobile. If you’re using a VoIP app like Telvio, the app will usually prompt country codes and formats.

9. Know when to switch methods

   • If your built‑in Wi‑Fi Calling offers poor performance or costly international rates, switch to a dedicated VoIP app that calls phone numbers at lower rates.
   • For app‑to‑app calls, use FaceTime Audio or WhatsApp for the simplest free option when the other person has the app.

Troubleshooting quick checklist

• No sound: Check microphone permissions and headset connection.
• Call drops: Move closer to the router or switch to a less congested network.
• One‑way audio: Reboot device, check NAT/Firewall on router — SIP ALG often causes problems for VoIP.
• App not dialing international: Confirm you’ve entered country code and check the app’s supported countries.

For deeper technical background or options like virtual numbers and how they help routing, see our guide on virtual phone numbers.