Wi-Fi Calling: Which Smartphones Will Support the Technology in 2026?

Technology Wi-Fi Calling (or VoWiFi) allows you to make calls and send text messages over Wi-Fi networks when mobile service is unavailable or weak. This is especially useful in basements, elevators, country houses, or when traveling abroad, where roaming charges are expensive. However, not all smartphones support this feature—its availability depends on the model, firmware version, and even the carrier.

In this article we will look at, Which smartphones support Wi-Fi Calling? In 2026, how to check your device's compatibility and what to do if the feature isn't activated. We'll pay special attention to models from Apple, Samsung, Xiaomi, Google and other popular brands, as well as the nuances of working with Russian and foreign operators.

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

Wi-Fi Calling — is a communication standard that allows the use of Wi-Fi networks for voice calls and SMS instead of traditional mobile networks (2G/3G/4G/5G). The technology operates on the basis of the protocol IMS (IP Multimedia Subsystem) and is integrated into modern smartphones at the firmware level.

Key benefits:

• 📶 Stable connection in areas with poor mobile network coverage (for example, in the metro or underground parking lots).
• 💰 Saving on roaming: Wi-Fi calls are charged as local calls, even if you are abroad.
• 🔄 Smooth transition between Wi-Fi and mobile network without connection interruption (if the operator supports it) eSIM or VoLTE).
• 📱 Works on all devices with one number (for example, calls to a smartphone, tablet or smartwatch).

It is important to understand that Wi-Fi Calling ≠ Messengers (WhatsApp, Telegram, Viber). These services use standard phone numbers, not app accounts. This means calls will be routed to your primary number, even if the other person doesn't have internet access.

How to Check if Your Smartphone Supports Wi-Fi Calling

Before setting up this feature, make sure your device supports it. There are several ways to check:

1. Official operator list. Each mobile operator (MTS, Beeline, MegaFon, Tele2, Yota) has a list of supported models. This list is usually published in the "Wi-Fi Calling" section on their website.
2. Smartphone settings. Go to Settings → Mobile → Wi-Fi Calling (The path may vary depending on the firmware.) If this item is missing, the function is not supported.
3. IMEI check. On some websites (for example, IMEI.info) you can enter the IMEI of the device and find out if it supports VoWiFi.

If there is an option in the settings, but it is grayed out, the problem may be:

• 📱 Outdated firmware (update software).
• 📡 Unsupported operator (check with your provider).
• 🔒 Blocking by the manufacturer (relevant for some Chinese smartphones).

What should I do if Wi-Fi Calling won't turn on?

If the option is greyed out and cannot be clicked, try:

1. Insert the SIM card into the first slot (on some smartphones this function only works with the primary SIM card).

2. Disable VPN or proxy - they may block the IMS connection.

3. Reset network settings in Settings → System → Reset → Reset Mobile Network.

4. Contact your operator and check whether the service is activated on your tariff.

List of smartphones with Wi-Fi calling support (2026)

We have compiled an up-to-date list of models that are officially supported VoWiFi In Russia and the CIS. Please note that some devices may require manual activation through your carrier or a firmware update.

Important: Wi-Fi Calling may be blocked at the firmware level for Russian smartphones from Realme, Oppo, Vivo, and some other Chinese manufacturers. Before purchasing, check this information with the seller or on forums (e.g., 4PDA).

Check with your operator for a list of supported models.

Check if the specifications mention IMS or VoLTE

Check user reviews on forums (firmware issues may occur)

If you buy a used one, ask the seller to demonstrate the Wi-Fi Calling function.

Wi-Fi Calling on iPhone: Features and Setup

Smartphones Apple historically leading in support Wi-Fi Calling - the function is available on all models starting from iPhone 6s (2015). However, there are some nuances:

• 🍎 iOS 12 and later. This function may not be available on older software versions.
• 📶 Operator support. In Russia, MTS, Beeline, MegaFon and Tele2 officially operate VoWiFi, but the tariff must support VoLTE.
• 🔄 Switch between Wi-Fi and 4G. On iPhone 12 and newer ones the transition occurs smoothly, on older models short-term interruptions are possible.

How to enable Wi-Fi Calling on iPhone:

1. Open Settings → Phone → Wi-Fi Calling.
2. Turn on the "Wi-Fi Calling on this iPhone" switch.
3. Confirm your address for emergency services (required for 112 to function correctly).
4. Restart your device if the feature does not appear immediately.

On iPhone With dual-SIM (two physical cards or eSIM) Wi-Fi Calling only works on the primary line. To change the priority:

1. Go to Settings → Mobile.
2. Select the SIM card on which you want to activate VoWiFi.
3. Tap "Voice & Data" and set "Wi-Fi Calling".

Wi-Fi Calling on Android: A Step-by-Step Guide

On Android-smartphone activation process Wi-Fi Calling Depends on the manufacturer and firmware version. The general algorithm is as follows:

1. Make sure your device has the latest software version (update in Settings → System → Software Update).
2. Insert a SIM card from a supported carrier into first slot (on some models the function only works with the primary SIM card).
3. Go to your mobile network settings:
   • On Samsung: Settings → Connections → Mobile networks → Wi-Fi Calling.
   • On Xiaomi: Settings → SIM cards and mobile networks → [select SIM] → Wi-Fi Calling.
   • On Google Pixel: Settings → Network & Internet → Mobile network → Advanced → Wi-Fi Calling.

Activate the feature and confirm the address for emergency services.

Restart your smartphone.

If the option is not in the menu, try:

• 🔍 Enter "Wi-Fi Calling" in the settings search.
• 📥 Install the firmware update manually (for example, via Mi Flash Tool For Xiaomi or Odin For Samsung).
• 📞 Contact your operator's support team and request service activation on your number.

On devices with custom firmware (For example, LineageOS) the function may not work due to missing certificates IMSIn this case, the only solution is to revert to the stock firmware.

Wi-Fi Calling with Russian Operators: Rates and Restrictions

In 2026, all major Russian operators will support Wi-Fi Calling, but there are nuances regarding tariffs and regions. Here are the key points:

To find out if your plan supports Wi-Fi Calling:

1. Send a USSD request:
   • MTS: *111*464#
   • Beeline: *110*180#
   • Megaphone: *105*463#
   • Tele2: *155*1#

Or call the operator and check if the service is activated. VoLTE/VoWiFi on your number.

⚠️ Attention: Wi-Fi Calling activation conditions may vary depending on your region and SIM card type (physical or eSIM). For example, on some business plans, the feature is disabled by default. Check your account or contact your operator for details.

Common Wi-Fi Calling Problems and How to Fix Them

Even if your smartphone and operator support Wi-Fi Calling, malfunctions may occur. Here are the issues and solutions we'll discuss:

1. The function does not turn on (gray switch)

Possible causes and solutions:

• 📵 No operator support. Check the list of compatible devices on the provider's website.
• 📱 SIM card in the wrong slot. On some smartphones, VoWiFi only works with the SIM in the first slot.
• 🔄 Outdated firmware. Update your software or install custom firmware with support IMS.
• 🔒 Blocked by operator. Call support and ask to activate the service.

2. Calls are dropped or not received

If the connection is established, but the conversation is interrupted:

• 📶 Weak Wi-Fi signal. Connect to a 5GHz network or move closer to the router.
• 🔌 Conflict with VPN. Disable VPN or add an exception for IMS traffic.
• 📱 Firmware failure. Reset network settings (Settings → System → Reset → Reset Mobile Network).

3. It is impossible to call short numbers (112, 102, etc.)

This is a known issue on some Android smartphones. Solutions:

• Update your firmware to the latest version.
• Manually enter the emergency services address in the Wi-Fi Calling settings.
• Use alternative calling methods (e.g. via mobile network).

⚠️ Attention: On smartphones with MediaTek-processors (for example, Redmi Note 11Wi-Fi Calling may be unstable due to issues with the modem drivers. In this case, the only solution is to replace the device or wait for an update from the manufacturer.

FAQ: Answers to frequently asked questions about Wi-Fi Calling

❓ Is it possible to use Wi-Fi Calling without a SIM card (only with eSIM)?

Yes, but with reservations. iPhone The function works with eSIM on most operators. Android Support depends on the model and firmware. For example, Google Pixel And Samsung Galaxy S22 support VoWiFi on eSIM, and many devices Xiaomi — No. Check with the operator.

❓ Why doesn't Wi-Fi Calling work abroad?

There are several reasons:

1. Your operator does not support international roaming for VoWiFi.
2. Local laws in the host country prohibit the use of foreign SIM cards for voice calls over Wi-Fi.
3. The "Wi-Fi calling abroad" option is disabled on the smartphone (on iPhone It can be enabled in the Wi-Fi Calling settings).

Before your trip, check with your operator about the terms of using VoWiFi in roaming.

❓ Can I make calls using Wi-Fi Calling if my phone has no service (in Airplane Mode)?

Yes, but on condition that:

• Wi-Fi is turned on and connected to the network.
• Function Wi-Fi Calling activated in the settings.
• The operator supports VoWiFi operation in "Airplane" mode (some providers prohibit this).

On iPhone It is enough to turn on the "Airplane" mode and manually activate Wi-Fi. Android Additional configuration may be required.

❓ How do I disable Wi-Fi Calling if it's interfering?

To deactivate the feature:

• On iPhone: Settings → Phone → Wi-Fi Calling and turn off the switch.
• On Android: the path depends on the firmware, but usually it is Settings → Mobile Network → Wi-Fi Calling.

After disabling, calls will only be made via the mobile network (2G/3G/4G/5G).

❓ Do smartwatches (Apple Watch, Galaxy Watch) support Wi-Fi Calling?

Yes, but with restrictions:

• Apple Watch (Series 3 and newer) support VoWiFi when connected to iPhone with the function activated.
• Samsung Galaxy Watch 4/5/6 can make calls via Wi-Fi, but only if the smartphone is on the same network.
• For autonomous operation (without a smartphone), the watch must have a SIM card (eSIM) with support installed. VoLTE/VoWiFi.

On other smartwatches (eg. Huawei Watch or Xiaomi Watch) function may be absent.