Calls via Wi-Fi (or VoWiFi Voice over Wi-Fi (Voice over Wi-Fi) has become an integral part of modern mobile communications. This technology allows voice calls to be made even without cellular coverage, using an internet connection through a router. This is especially relevant for buildings with thick walls, basements, rural areas, or when traveling abroad, where the carrier's signal leaves much to be desired.
In 2026, most Russian operators will MTS, Beeline, Megaphone And Tele2 — officially supported VoWiFi, but it requires a compatible smartphone, up-to-date firmware, and the correct settings. In this article, we'll look at how to enable Wi-Fi calling on Android And iPhone, which tariffs support the technology, and what to do if the connection is not established.
What is VoWiFi and how does it work?
VoWiFi (or Wi-Fi Calling) is a technology that transmits voice traffic over the internet instead of traditional cell towers. Unlike messengers like WhatsApp or Viber, it uses a standard phone book, and the person on the other end of the line sees your regular number, not your account in the app.
Advantages of the technology:
- 📶 Stable signal in areas with poor coverage (for example, in the metro or at a dacha).
- 💰 Saving When roaming: Wi-Fi calls abroad are charged as local calls (if your operator supports this option).
- 🔄 Smooth transition between Wi-Fi and a cellular network without connection loss (if the smartphone and operator support it) eSIM or IMS).
- 📱 Works on all devices, including iPhone (starting with iOS 8) and most Android- smartphones (from Samsung, Xiaomi, Google, etc.).
Technically VoWiFi uses the protocol IMS (IP Multimedia Subsystem), which is integrated into modern 4G/5G networks. This means that for the feature to work, your operator must support IMS, and the smartphone must have the corresponding module in its firmware. Most flagships released after 2018 are equipped with the necessary hardware.
⚠️ Attention: Not all operator tariffs include VoWiFi by default. For example, MegaFon The function is available only on tariffs with the "Unlimited calls" option, and Tele2 — with the "All Inclusive" package activated. Check the terms in your personal account or with your operator.
Which Russian operators will support VoWiFi in 2026?
As of early 2026, all major national carriers offer Wi-Fi calling, but with some caveats. Below is the current support table for the technology:
| Operator | VoWiFi support | Tariff requirements | Peculiarities |
|---|---|---|---|
| MTS | ✅ Yes | Any tariff with unlimited calls | Works on iPhone and Android. Calls work like local calls when roaming. |
| Beeline | ✅ Yes | Tariffs "All" and "Unlimited" | Requires activation in your personal account. Does not work with virtual numbers. |
| Megaphone | ✅ Yes | Tariffs with the "Unlimited Calls" option | Supports eSIMWhen roaming, rates apply to partner operators. |
| Tele2 | ✅ Yes | Tariffs "My Conversation", "All Inclusive" | Activation via USSD command *155*11#. |
| Yota | ❌ No | — | Plans for implementation in 2026 (information not confirmed). |
Important: Even if your operator supports VoWiFi, the function can be disabled at the SIM card level. For example, MTS And Beeline Sometimes it's blocked for corporate clients or older tariff plans. To check availability, send a USSD request:
- MTS:
*111*55# - Beeline:
*110*180# - Megaphone:
*105*500# - Tele2:
*155*11#
How to enable Wi-Fi calling on Android
Setting up VoWiFi on Android It depends on the operating system version and smartphone manufacturer. The general algorithm is as follows:
- Connect to a Wi-Fi network.
- Open
Settings → Connections → Mobile network(orSIM cards and mobile networks). - Select your SIM card (if you have more than one).
- Find the item Wi-Fi Calling or "Wi-Fi Calling" and activate it.
- If necessary, confirm the emergency services address (required for 112 calls).
On smartphones Samsung (One UI) the path may differ:
Settings → Connections → Mobile networks → Advanced → Wi-Fi callingOn Xiaomi (MIUI):
Settings → SIM cards & mobile networks → [Select SIM] → Wi-Fi callingIf the "Wi-Fi Calling" option is not available in the menu, there are possible reasons:
- 📱 Outdated firmware (update OS to the latest version).
- 🔄 Your operator does not support VoWiFi for your plan.
- 🔌 The SIM card is not activated for IMS services (contact a mobile phone store).
Update firmware to the latest version|
Connect to a stable Wi-Fi network (2.4 or 5 GHz)|
Check SIM card balance (must be positive)|
Make sure your carrier supports VoWiFi for your plan-->
⚠️ Attention: On some smartphones (eg. Huawei or Honor) function VoWiFi can be called Internet Calls or "Volte/Wi-Fi Calling"If calls don't work after activation, restart your device.
How to enable VoWiFi on iPhone (iOS)
On iPhone setting Wi-Fi Calling easier than on Android, but requires the fulfillment of several mandatory conditions:
- 📱 iPhone 6 or later (all models with iOS 8 and later).
- 📶 SIM card with support IMS (usually issued by default after 2020).
- 🌍 The region in the phone settings is Russia (the function may not work if a foreign region is selected).
Step-by-step instructions:
- Go to
Settings → Cellular. - Select Wi-Fi Calling.
- Activate the slider Wi-Fi Calling on This iPhone.
- When prompted, enter address for emergency services (for example, home address).
- Confirm activation via SMS (you will receive a message from the operator).
After turning on, the following message will appear in the status bar next to the operator's name: "Wi-Fi" or "VoWiFi"If it is not there, check:
- 🔄 Restart your iPhone.
- 📶 Make sure the mode is enabled
4G (LTE)VSettings → Cellular → Data Options → Voice & Data. - 🔧 Update iOS to the latest version (relevant for iPhones older than the 8th model).
Why Wi-Fi Calling Doesn't Work: Common Problems
If after setting up VoWiFi If calls aren't going through, the cause could be either the device or the carrier. Let's look at typical scenarios and how to resolve them:
| Problem | Possible cause | Solution |
|---|---|---|
| There is no "Wi-Fi Calling" option in the settings. | Outdated firmware or incompatible smartphone | Update your OS or check the list of supported devices with your carrier. |
| The call is not established (it is being dropped) | Operator blocking or incorrect IMS settings | Restart your phone, check your balance, and contact support. |
| VoWiFi works, but the connection quality is poor. | Slow Wi-Fi speed or congested network | Connect to a different network or reboot your router |
| The function is available but not activated. | Your carrier does not support VoWiFi for your plan. | Change your tariff or contact a mobile phone store. |
Particular attention should be paid to routers: some models (especially older ones) block UDP packets, necessary for VoWiFiIf the problem only occurs on one Wi-Fi network, try:
- 🔧 Disable firewall on the router.
- 🔄 Change Wi-Fi channel to a less busy one (for example, from automatic to 6th or 11th).
- 📡 Update your router firmware (relevant for TP-Link, ASUS, Keenetic).
What should I do if VoWiFi works but doesn't switch to the cellular network?
If the call drops when you leave the Wi-Fi coverage area, the problem may be in the settings. IMS or eSIMOn Android, check the setting Settings → Mobile network → Call forwarding and enable the "Switch between Wi-Fi and cellular" option. This setting is enabled automatically on iPhone, but if issues persist, reset your network settings: Settings → General → Transfer or reset iPhone → Reset → Reset Network Settings.
VoWiFi Abroad: How to Save on Roaming
One of the key advantages VoWiFi is the opportunity to save on international roaming charges. If your operator supports this option, calls made via Wi-Fi abroad will be charged as local, and not at inflated roaming rates.
Terms of Use VoWiFi in roaming for Russian operators (2026):
- MTS: Wi-Fi calls while roaming are charged as outgoing calls from Russia (if the "Unlimited Roaming" package is activated).
- Beeline: VoWiFi in roaming is only available for subscribers of the "All" and "Unlimited" tariffs when the "Travel easily" option is activated.
- Megaphone: Wi-Fi calls abroad are considered local calls, but require activation of the "Go!" service.
- Tele2VoWiFi roaming only works in countries where the operator has partnership agreements (check the list on the website).
Important: even if VoWiFi works abroad, incoming calls may still be charged as roaming charges. To avoid unexpected charges:
- 📵 Turn off call forwarding (
*#21#— checking active redirects). - 🔕 Use instant messengers (WhatsApp, Telegram) for incoming calls.
- 📄 Check the fare conditions in your personal account before your trip.
⚠️ Attention: In some countries (eg US, UAE, China) local laws may block VoWiFi For foreign operators. Please check this information with support before your trip.
VoWiFi vs. VoLTE: What's the Difference and Which is Better?
Often VoWiFi confused with VoLTE (Voice over LTE) is a technology for voice communication over 4G networks. Both technologies use IMS, they have different application scenarios:
| Parameter | VoWiFi | VoLTE |
|---|---|---|
| Connection type | Wi-Fi (Internet) | 4G/5G (cellular network) |
| Connection quality | Depends on Wi-Fi speed | Stable, but requires 4G coverage |
| Working in roaming | Yes (like local calls) | Yes (but at roaming rates) |
| Energy consumption | Low (if Wi-Fi is always on) | Average (depending on 4G signal strength) |
| Operator support | Not all tariffs | Most modern tariffs |
VoWiFi is more cost-effective to use in areas with poor 4G coverage or abroad, where VoLTE may be unavailable or expensive. However, if you have a stable cellular network signal, VoLTE preferable - it provides clearer communication and connects calls faster.
On most smartphones, both technologies can be enabled simultaneously. For example, on Samsung Galaxy:
Settings → Connections → Mobile networks → Network mode → LTE/3G/2G (auto)Wi-Fi Calling → On
4G Calling (VoLTE) → On
FAQ: Frequently asked questions about Wi-Fi calling
Is it possible to use VoWiFi without a SIM card?
No, for work VoWiFi An active SIM card with support is required IMSThe technology uses your phone number, so without a SIM card, Wi-Fi calls are not possible (unlike instant messaging apps like Viber).
Why does the other person hear an echo when making a call over Wi-Fi?
Echo at VoWiFi usually associated with network latency (high ping). Try:
- Connect to a different Wi-Fi network (for example, from 5 GHz to 2.4 GHz).
- Disable on the router QoS (if priority for other devices is enabled).
- Use a wired connection for your router (if it supports it) Ethernet).
If the problem persists, the operator is to blame - please contact support.
Is it possible to make Wi-Fi calls from a laptop or tablet?
Yes, but with some reservations:
- 📱 On tablets with call support (eg Samsung Galaxy Tab or iPad With eSIM) VoWiFi works the same way as on smartphones.
- 💻 On laptops You can call through VoWiFi only with the help of special operator applications (for example, MTS Connect or Beeline Space), but this is no longer pure VoWiFi, but a software alternative.
Will VoWiFi work with two SIM cards?
Yes, but only on one SIM card at a time. On smartphones with Dual SIM (For example, iPhone 12+ or Samsung Galaxy S22) you can choose for which SIM card to enable VoWiFiThe second slot will use a regular cellular connection.
How to disable VoWiFi if you don't need it?
To disable Wi-Fi calling:
- On Android:
Settings → Mobile Network → Wi-Fi Calling → Disable. - On iPhone:
Settings → Cellular → Wi-Fi Calling → Disable.
Disabling VoWiFi can improve battery life if you rarely make Wi-Fi calls.