Wi-Fi Calling: Which Carriers Support VoWiFi and How to Use It

In the era of total digitalization, the quality of mobile communications remains critically important, especially in areas with poor coverage. Technology VoWiFi (Voice over Wi-Fi) solves this problem by allowing you to make calls over the internet even in areas without cellular coverage. However, not all carriers and not all smartphones support this feature. In this article, we'll look at What are the Russian and foreign mobile operators? They offer Wi-Fi calling, how to activate it, and what to pay attention to when setting it up.

It's important to understand that VoWiFi isn't the same as messaging apps like WhatsApp or Telegram. It's a complete replacement for standard calls, where your number remains visible to the recipient, and the conversation is conducted through the operator's network, but using IP protocol. Key advantages: battery saving (no need to keep 4G/5G on for communication) and a stable connection in basements, the subway, or outside the city. However, there are nuances, from phone requirements to possible roaming restrictions.

What is VoWiFi and how does it work?

Technology Voice over Wi-Fi (VoWiFi) Allows you to make voice calls and send SMS messages over a Wi-Fi connection instead of traditional cell towers. This is especially useful in areas with weak mobile signal, such as deep inside office buildings, underground parking garages, or in rural areas. The principle is simple:

• 📶 Your smartphone connects to any available Wi-Fi network (home, office, or public).
• 🔄 The call is routed through the operator's servers using the protocol IMS (IP Multimedia Subsystem).
• 📞 The subscriber sees your regular number, not your messenger ID—as with a standard call.
• 🔒 Traffic encryption guarantees the confidentiality of the conversation.

Difference from VoIP (for example, Skype or Zoom) is that VoWiFi is integrated at the operator level and doesn't require additional apps. However, three key conditions are required for it to work:

1. Support technology by yours mobile operator.
2. Compatible smartphone (please check with the manufacturer for the list of models).
3. Activate the service in your personal account or via a USSD command.

Which Russian operators will support VoWiFi in 2026?

VoWiFi technology is rapidly developing in the Russian market, but not all operators offer it fully. Below is a current list of providers that support Wi-Fi calling, along with key connection requirements.

⚠️ Attention: VoWiFi connection conditions may vary by region. For example, in Crimea or the Far East, some operators temporarily suspend support due to licensing issues. Before activating the service, check its availability. personal account or through support service.

How to connect VoWiFi on a smartphone: step-by-step instructions

The process for activating Wi-Fi calling varies depending on your phone model and operating system. Below are general instructions for iOS And Android, as well as a list of compatible devices.

For iPhone (iOS 13 and later)

1. Open Settings → Phone → Wi-Fi Calling.
2. Turn on the "Wi-Fi Calling on this iPhone" slider.
3. Confirm activation if prompted by your operator.
4. An indicator will appear in the status bar. Wi-Fi next to the operator's name.

For Android (using Samsung Galaxy as an example)

1. Go to Settings → Connections → Mobile networks.
2. Select your SIM card and enable the option Wi-Fi calling.
3. If necessary, confirm the connection via SMS from the operator.
4. An icon will appear in the notification bar. VoWiFi or Wi-Fi Calling.

⚠️ Attention: On some budget smartphones (for example, Redmi or Realme) The VoWiFi function may be blocked by the manufacturer even if supported by the operator. In this case, the only solution is to update the firmware from the official website or replace the device.

List of compatible smartphones for VoWiFi

Not all phones support Wi-Fi calling, even if your carrier offers it. Here's the current list of compatible devices (as of 2026):

• 📱 Apple iPhone: all models with iOS 13 and later (from iPhone 6s to iPhone 15).
• 🤖 Samsung Galaxy: S series (from S8), Note (from Note 9), A (from A50), Fold/Z.
• 📳 Google Pixel: all models starting with Pixel 3.
• 🔗 Xiaomi: flagship models (Mi 11/12/13, Redmi K50/K60) with MIUI 13+.
• ❌ Budget brands: Tecno, Infinix, some Nokia and Motorola models may not support VoWiFi.

To check if your device is compatible:

1. Go to SIM card settings (the path depends on the firmware).
2. Try turning it on manually Wi-Fi calling.
3. If this option is not available, please check with the manufacturer or operator.

What should I do if VoWiFi doesn't work on a supported phone?

Check if mobile data is enabled (sometimes VoWiFi requires an active SIM card). Also, try resetting network settings in the menu. Settings → System → Reset → Reset Mobile NetworkIf the problem persists, contact the operator's support team with error logs (they can be accessed through the engineering menu).

VoWiFi in roaming: does it work abroad?

One of the key advantages of VoWiFi is the ability to make calls at your home rate even when abroad, without incurring additional roaming charges. However, there are a few caveats:

• ✈️ MTS and MegaFon They support VoWiFi in roaming, but only in countries where they have partnership agreements (check the list on the website).
• 🌍 Beeline Allows Wi-Fi calling while roaming, but may charge for outgoing calls (depending on plan).
• 🚫 Tele2 and other small operators usually block VoWiFi abroad.

Important: Even if the operator allows VoWiFi in roaming, Incoming calls may be charged as international callsIf you're connected to a foreign Wi-Fi network, you'll need to pay a fee. To avoid unexpected charges:

⚠️ Attention: Before traveling, check with your provider about VoWiFi rates in your destination country. Some networks (such as hotel Wi-Fi) may block the IMS protocol, making calls impossible.

Common VoWiFi Problems and How to Fix Them

Despite its convenience, Wi-Fi calling can sometimes be unstable. Here are some common issues and how to fix them:

If problems persist, try:

• 🔄 Switch between modes Wi-Fi is preferred And Mobile network is preferred (in VoWiFi settings).
• 📱 Update your phone firmware to the latest version.
• 📡 Change your Wi-Fi network (for example, from your home network to a mobile hotspot).

VoWiFi vs. VoLTE: What's the Difference and Which is Better?

Along with VoWiFi, the technology is often mentioned VoLTE (Voice over LTE). Both allow internet calling, but are designed for different scenarios:

• 📡 VoLTE — Calls via the operator's 4G/5G network. Requires LTE coverage, but provides better sound quality (HD voice).
• 🌐 VoWiFi — Calls over any Wi-Fi network. Works even without a cellular signal, but depends on a stable internet connection.

The ideal scenario is when a smartphone supports both technologies and automatically switches between them. For example:

• On the street (where there is 4G) - used VoLTE.
• At home (where Wi-Fi is more stable) - it connects VoWiFi.

⚠️ Attention: On some plans, operators may charge differently for VoLTE and VoWiFi. For example, Wi-Fi calls may deduct minutes from your plan, but VoLTE calls do not. Check the plan description for details!

FAQ: Answers to frequently asked questions about VoWiFi

Is it possible to use VoWiFi without a SIM card?

No, VoWiFi requires an active SIM card from a carrier that supports the technology. Without a SIM card, Wi-Fi calls are only possible through messaging apps (WhatsApp, Viber, etc.).

How much traffic does VoWiFi use?

On average, one hour of conversation via VoWiFi consumes about 50–100 MB traffic. This is comparable to watching a 480p video. If you have an unlimited internet plan, the consumption won't be critical.

Does VoWiFi work on tablets?

Yes, but only if the tablet supports SIM cards and is compatible with the technology (e.g. iPad Pro from cellular or Samsung Galaxy Tab S (with LTE). VoWiFi is not available on Wi-Fi-only devices.

Is it possible to make Wi-Fi calls from a computer?

There is no direct analogue of VoWiFi for PC, but some operators (for example, MTS) offer the service "Mobile number on the computer" through a special application. An alternative is to use Google Voice or Skype with number binding.

Why won't my operator activate VoWiFi on my phone?

There could be several reasons: outdated firmware, IMS blocking by your carrier in your region, or the model not being supported in the provider's database. Try contacting support and requesting manual activation.