Wi-Fi Calling on Android with MTS: How to Set Up VoWiFi in 5 Minutes

Calls via Wi-Fi (or VoWiFi) is a technology that allows you to make voice calls even without a cellular network, using an internet connection. For subscribers MTS This feature is available on most modern smartphones. Android, but its activation requires proper configuration both on the phone and in the operator's personal account. Unlike messengers like WhatsApp or Telegram, VoWiFi integrated into the standard Phone application, making it more convenient for everyday use.

In this article we will look at how to enable calls through Wi-Fi on Android- devices with a SIM card MTS, which phone models support the technology, and what to do if the feature doesn't work. You'll also learn about the plans, where VoWiFi is available at no extra cost., and the nuances of roaming when using Wi-Fi calls abroad. If you often travel to places with poor network coverage (basements, remote areas, country houses), this guide will help you stay connected without interruption.

What is VoWiFi and why is it better than instant messaging?

VoWiFi (Voice over Wi-Fi) is a communications standard that allows voice calls to be transmitted over the internet rather than through cell towers. Unlike calls in Viber or Skype, where a separate application is required, VoWiFi works directly through a standard phone number. This means:

• 📞 Calls are sent to your regular number, not to your Messenger account.
• 🔄 There is no need to convince your interlocutor to install the same application.
• 📶 Call quality is often better than in instant messaging apps, thanks to the operator's prioritization of voice traffic.
• 💰 Billing is based on your tariff plan. MTS (free as part of the minutes package).

For MTS technology VoWiFi It's been available since 2020, but many subscribers still don't know about it. The main advantage is stable connection in poor coverage areas, for example, in the subway, shopping centers or at the dacha, where the 4G/5G signal is weak. VoWiFi Automatically switches to cellular network if Wi-Fi goes down, without interrupting your call.

⚠️ Attention: VoWiFi And ViLTE (4G calls) - different technologies. The first one works via Wi-Fi, the second one - via mobile Internet. On some plans MTS only one of them can be available.

Which Android phones support MTS VoWiFi?

Not all smartphones Android can work with VoWiFi from MTSBasic requirements:

• 📱 Hardware support: The phone must have a chip compatible with VoWiFi (most models after 2018).
• 🤖 Android version: not lower Android 9 Pie (for some brands - Android 10+).
• 📡 Operator firmware: Some devices require official firmware MTS (for example, on Samsung Galaxy or Xiaomi Redmi).

Here is a list of popular brands and models that guaranteed to support VoWiFi on MTS (as of 2026):

If your model is not listed, please check support via:

1. Phone settings: Settings → Connections → Mobile network → Additional settings (look for the item VoWiFi or Wi-Fi calling).
2. Official website MTS: in the section "Services" → "VoWiFi" there is an up-to-date list of compatible devices.

⚠️ Attention: On phones with custom firmware (for example, LineageOS) VoWiFi may not work even with hardware support.

Step-by-step VoWiFi setup on Android with MTS

To activate calls via Wi-Fi, you need to complete the setup both on your phone and in your personal account MTSLet's consider both stages.

1. Enable VoWiFi in Android settings

The instructions may differ slightly depending on the phone model, but the general algorithm is as follows:

1. Open Settings phone.
2. Go to the section Connections (or Network and Internet).
3. Select Mobile network → Additional settings (sometimes the item is called Wi-Fi calling).
4. Activate the switch VoWiFi or Wi-Fi calling.
5. In some cases you will need to select a mode:
   • Wi-Fi only — calls will only be made via the Internet.
   • Wi-Fi is preferred — the phone will use Wi-Fi if it is more stable than the cellular network.
   • Cellular network is preferred — Wi-Fi is only activated when there is no signal.

On Samsung Galaxy the path may look like this: Settings → Connections → Mobile networks → Wi-Fi calling.

On Xiaomi: Settings → SIM cards & mobile networks → [select SIM] → Wi-Fi calling.

Connected to a stable Wi-Fi network|MTS SIM card inserted in slot 1|Phone supports VoWiFi|Firmware updated to the latest version-->

2. Activate the service in your MTS personal account

Even if you turned it on VoWiFi On your phone, your operator may block the feature if it's not activated in your plan. To check and enable it:

1. Go to MTS personal account (or open the "My MTS" application).
2. Go to the section Services → Additional services.
3. Find VoWiFi (or "Wi-Fi Calling") and activate it.
4. If the service is not on the list, check whether your tariff supports it (more on this below).

On some tariffs (for example, “Everything for Yourself” or “Ultra”) VoWiFi Connects automatically. If you don't see this option, please contact support. MTS by number 0890 (call is free).

Which MTS tariffs support VoWiFi in 2026?

Not all tariff plans MTS support Wi-Fi callsAs of 2026, this feature is available on the following plans:

• 📱 «Everything for one's own" (all modifications, including "For your XS", "For your XL").
• 🚀 «Ultra" And "Super MTS».
• 💼 «Business XS/M/L» (for corporate clients).
• 🌍 «MTS Connect» (travel rates).

At the tariffs "Smart», «Tariff» and some regional offers VoWiFi may be unavailable Or request separate activation through support. To check if your plan supports this feature:

1. Send a USSD request: *111*59# (checking available services).
2. Call on 0890 and check with the operator.
3. Check in your personal account in the "My Services" section.

⚠️ Note: On some tariffs VoWiFi May be charged as an outgoing call according to your standard minute package. Roaming rules may vary—check before traveling.

Common VoWiFi issues on MTS and how to solve them

If after setting up VoWiFi It doesn't work, here are the typical reasons and how to fix them:

1. The VoWiFi icon does not appear in the status bar

Possible reasons:

• 🔌 Wi-Fi is disabled or the signal is weak (check your internet speed).
• 📵 The SIM card is not activated for VoWiFi (call back to 0890).
• 🔄 Firmware update required (check in Settings → Software Update).

2. Calls are dropped or the connection quality is poor

What to do:

• 📶 Reconnect to Wi-Fi or reboot your router.
• 🔇 Check if power saving mode is enabled (it may limit background VoWiFi activity).
• 📱 Reset network settings: Settings → System → Reset → Reset network settings.

3. The other person can't hear you or hears an echo.

This may be due to:

• 🎤 Problems on the operator's side (call back later).
• 🔊 Incorrect microphone settings (check if the microphone hole is covered by a case).
• 📡 Wi-Fi network overload (turn off other devices consuming traffic).

What to do if VoWiFi disappeared after an Android update?

Sometimes after major system updates, VoWiFi settings are reset. Try this:

1. Disable and re-enable VoWiFi in the settings.

2. Remove and reinsert the SIM card.

3. Reset network settings (see above).

If this doesn't help, please contact support. MTS with a request to reactivate the service.

If none of the methods helped, please contact technical support. MTS through:

• 📞 Call on 0890 (for free).
• 💬 Chat in the "My MTS" app.
• 📧 Feedback form on the website MTS.

VoWiFi in roaming: does it work abroad?

One of the main advantages VoWiFi is the ability to call through Wi-Fi while roaming, saving on international rates. However, there are some nuances:

• ✈️ On the tariffs "MTS Connect" And "Ultra» VoWiFi works without additional charges while roaming. (tariffing is the same as at home).
• 🌎 Other tariffs may incur roaming charges (check with your operator).
• 🚫 In some countries (for example, China, Iran) VoWiFi may be blocked local operators.

To use VoWiFi abroad:

1. Make sure the service is activated in your personal account.
2. Connect to a stable Wi-Fi connection (at a hotel, cafe, or via a local SIM card with internet).
3. Make sure that the "" mode is enabled in your phone settings.Wi-Fi calls while roaming» (if any).

⚠️ Please note: In some countries (e.g. USA or EU) local operators may block VoWiFi For foreign SIM cards. Please check with support before your trip. MTS.

VoWiFi Alternatives: What to Do If the Feature Isn't Available

If your phone or tariff MTS does not support VoWiFi, there are several alternative ways to make calls over the Internet:

1. Messengers with call support

• 💬 WhatsApp — free Wi-Fi calls, but requires installation on the other party's end.
• 📎 Telegram - good connection quality, but no phone book integration.
• 🤖 Google Duo — optimized for weak networks, works on Android and iOS.

2. Operator applications

MTS offers its own solution - the application "MTS Connect", which allows you to make calls over the Internet even without VoWiFi. Advantages:

• 📞 Calls are coming from your number MTS (no need to register a new account).
• 💰 Tariffs are charged according to your tariff rules.
• 🌍 Works in roaming (on some tariffs).

3. Virtual numbers

Services like Skype Number or Google Voice Allows you to get an additional number for Wi-Fi calls. The downside is the fee for the number and possible restrictions on incoming calls.

FAQ: Frequently asked questions about VoWiFi on MTS

🔹 Do I need to pay for VoWiFi separately?

No, if your tariff supports it VoWiFiCalls are charged as normal, within the minutes included in the package. There are no additional charges (except for roaming on some plans).

🔹 Can I use VoWiFi without a SIM card?

No, for work VoWiFi an active SIM card is required MTS, even if calls are made over Wi-Fi. This feature is unavailable without a SIM card.

🔹 Why does VoWiFi only work on one SIM card in a dual-SIM phone?

Most phones support VoWiFi only for primary SIM card (usually slot 1). If you have two SIM cards, check the settings for each one or swap the cards. MTS in the first slot.

🔹 How do I disable VoWiFi if I don't need it?

Go to your phone settings (Settings → Mobile Network → Wi-Fi Calling) and deactivate the function. You can also deactivate the service in your personal account. MTS.

🔹 Will emergency calls (112, 911) work via VoWiFi?

Yes, but with some caveats: emergency calls via VoWiFi They may not be detected in all countries. They should work in Russia, but abroad, it's better to use the local cellular network or standard roaming.