Wi-Fi Calling: How to Set Up and Use It on Any Device

Calls via Wi-Fi (or VoWiFi) is a technology that allows you to communicate over the phone without using a mobile network. Instead of using cell towers, your voice is transmitted over the internet, which is especially useful in areas with poor carrier coverage, such as basements, remote areas, or abroad. But how does it work in practice? And most importantly, how do you set it up?

Today VoWiFi Almost all modern smartphones support Wi-Fi calling, and some carriers even offer it by default. However, there are some caveats: not all plans include free Wi-Fi calling, and older devices may require manual setup. In this article, we'll walk you through everything step by step—from checking compatibility to troubleshooting common issues.

What is Wi-Fi calling and why is it needed?

Technology Voice over Wi-Fi (VoWiFi) allows you to make voice calls and send SMS messages over the internet, rather than through traditional cellular networks. This is not the same as messaging apps like WhatsApp or Viber — your regular phone number is used here, and the subscriber will see the usual incoming call.

Key benefits:

• 📶 Stable signal in areas with poor coverage (for example, in the metro or at a dacha).
• 🌍 Saving on roaming — Wi-Fi calls abroad are often cheaper.
• 🔋 Less battery consumption, than when searching for a cellular network.
• 📱 Support on all modern smartphones (starting from iPhone 6 And Android 9+).

But there are also limitations. For example, Some operators block VoWiFi on corporate plans or require separate activation.This feature may also not work when connecting to public networks (such as cafes or airports) where certain ports are blocked.

Which devices support VoWiFi?

The feature is available on most smartphones released after 2018. Here are the minimum requirements:

On Windows-laptops and Mac Wi-Fi calling is only possible through operator apps (e.g. MTS Connect or Beeline Prostor). And here's Android- On tablets without a SIM card, this function is usually unavailable; a physical SIM card or eSIM is required.

⚠️ Note: On some budget smartphones (for example, Realme C-series or Nokia 2.4) VoWiFi may not be available even with the latest version of Android. Check the model specifications on the manufacturer's website.

How to enable Wi-Fi calling on Android

The instructions may differ slightly depending on the shell (MIUI, One UI, ColorOS, etc.), but the general algorithm is as follows:

1. Open Settings → Connections → Mobile network (or SIM cards and mobile networks).
2. Select your SIM card (if you have more than one).
3. Find the item Wi-Fi calling (sometimes hidden in Additional settings).
4. Activate the switch. The system may request confirmation via SMS.

On Samsung the path may look like this: Settings → Connections → Mobile networks → Wi-Fi callingOn . Xiaomi — Settings → SIM cards & mobile networks → Wi-Fi calling.

Update your firmware to the latest version

Make sure your SIM card is activated and not blocked.

Connect to a stable Wi-Fi network (not a public one)

Check if your carrier supports VoWiFi-->

Once activated, an icon will appear in the status bar. Wi-Fi Calling (usually it's a tube with waves or an inscription VoWiFi). If there is no icon, but the function is enabled, restart your phone.

⚠️ Attention: On some firmware (for example, ColorOS from Oppo/Realme) After enabling VoWiFi, mobile internet may disappear. In this case, go to Settings → Mobile network → Network mode and select 4G (recommended).

Setting up VoWiFi on iPhone (iOS)

On iPhone The process is simpler, but there are some nuances. Firstly, the function is only available if your carrier supports it. Wi-Fi Calling (The list can be checked on the Apple website.) Secondly, some plans may require additional activation through your personal account.

Step-by-step instructions:

1. Go to Settings → Phone → Wi-Fi Calling.
2. Activate the slider Wi-Fi calling on this iPhone.
3. If prompted, confirm your emergency address (this is a legal requirement in many countries).
4. For other Apple devices (eg. iPad or Mac) turn on the option Calls on other devices in the same menu.

On the lock screen or in the status bar you will see the inscription Wi-Fi next to your operator name. If it's not there, but the feature is enabled, check if you're connected to the network and if a firewall is blocking it (for example, in office networks).

How to make Wi-Fi calls from a laptop or PC

Computers don't have built-in VoWiFi support, but there are workarounds:

• 💻 Operator applications: U MTS, Beeline And MegaFon There are desktop versions of applications for making calls over the Internet. For example, MTS Connect or Beeline ProstorRegistration by phone number is required.
• 🌐 Web versions of instant messengers: WhatsApp Web, Telegram or Viber Allows you to make calls through a browser, but the caller will see the call not from your main number, but through a messenger.
• 📱 Android emulators: It is possible to install BlueStacks or Genymotion, log in to the operator's app, and make calls through it. The downside is the high resource consumption of your PC.

The most reliable way is to use your operator's official software. For example, in MTS Connect Calls to MTS numbers are free, while calls to other numbers are subject to a tariff. Check the terms in your personal account.

⚠️ Please note: When making calls through web versions of messengers, your voice traffic is not encrypted as securely as with standard VoWiFi. Avoid discussing sensitive information through these channels.

Which operators in Russia support VoWiFi?

As of 2026, all major federal operators offer Wi-Fi calling, but the terms and conditions vary:

To check support for your tariff, send a USSD request:

• MTS: *111*1810#
• Beeline: *110*180#
• Megaphone: *105*00#
• Tele2: *155*1#

⚠️ Please note: Terms and conditions may change. For example, Megaphone In 2023, VoWiFi was disabled for the 2019 "All Inclusive" plans. For up-to-date information, please check your personal account or contact support.

Common problems and their solutions

If Wi-Fi calling isn't working, check the following:

What to do if VoWiFi is not activated?

1. Check your SIM cardYou must have a USIM (not the old SIM). Replace it at a carrier store.

2. Update the firmware: On Android, go to Settings → System → Software UpdateOn iPhone: Settings → General → Software Update.

3. Reset network settings: On Android: Settings → System → Reset → Reset Wi-Fi, mobile network, and Bluetooth settingsOn iPhone: Settings → General → Transfer or reset iPhone → Reset network settings.

4. Check your routerSome routers block VoWiFi. Try connecting to a different network or disable the firewall on your router (settings) SIP ALG should be turned off).

Here are a few more common mistakes:

• 🔄 The call is dropped after 10-20 seconds: There's a problem with your router's NAT traffic. Try enabling it. UPnP in the router settings.
• 📵 There is no VoWiFi icon even though the feature is enabledRestart your phone and router. If that doesn't help, check if you have a VPN (some block VoWiFi).
• 🔒 The operator requires confirmation of personal dataThis is standard procedure for emergency calls. Please enter a valid address (your home address is fine).

If nothing helps, contact your operator's support. MTS And Beeline There are chats in Telegram (@MTS_help and @BeelineHelp), where they respond quickly.

FAQ: Frequently asked questions about Wi-Fi calling

Is it possible to make calls over Wi-Fi without a SIM card?

No, VoWiFi requires an active SIM card from a carrier that supports the technology. However, you can use SIM-free messaging apps (WhatsApp, Telegram), but the caller will see the call coming from a different number than your primary number.

Are Wi-Fi calls counted as internet traffic?

No, VoWiFi calls are charged like regular voice calls (per minute or as part of unlimited plans). Data charges are not deducted from your internet plan.

Is it possible to receive SMS via Wi-Fi?

Yes, if your carrier supports it. SMS over Wi-FiThis feature is usually enabled automatically with VoWiFi. Check your mobile network settings.

Does VoWiFi work abroad?

Yes, but the pricing depends on the operator. For example, MTS And Beeline allow you to make Wi-Fi calls abroad at domestic rates (without roaming), and Megaphone Charges may apply for international calls. Check the terms before your trip.

Why are calls on Wi-Fi worse than on a cellular network?

This may be due to:

• Unstable Wi-Fi signal (check network speed).
• Voice compression codecs (some operators use EVS, which requires a good internet connection).
• Router settings (disable QoS for voice traffic).

Try reconnecting to the network or use a wired connection (Ethernet via adapter).