How to Make Wi-Fi Calls: A Complete Guide to Setting Up VoWiFi on Your Smartphone

Wi-Fi calling (or VoWiFi) is a technology that allows voice calls to be made over a wireless network instead of a cellular connection. This is especially useful in areas with poor mobile network coverage: basements, country houses, or abroad, where roaming is expensive. But how exactly does this feature work, and how do you enable it? iPhone or Android, and what pitfalls might arise? In this guide, we'll cover everything from basic principles to solutions to common problems.

Many users are confused VoWiFi with messengers like WhatsApp or Telegram, but these are fundamentally different things. Wi-Fi calls use the operator's network (like regular calls), but transmit voice data over the internet. This means your phone number remains visible to the caller, and the call quality depends on the stability of the Wi-Fi, not the strength of the tower signal. Furthermore, unlike instant messaging apps, VoWiFi It works even if the subscriber doesn't have internet access—the main thing is that their phone supports the technology.

In this article you will find:

• 🔧 How to enable Wi-Fi calling on Android And iOS (step by step for different versions).
• 📶 Comparison VoWiFi And VoLTE: what is better and when to use.
• 💡 Top 5 operators in Russia that support the technology (with current rates).
• ⚠️ Common setup errors and how to fix them.
• 🛡️ How to ensure secure Wi-Fi calls and avoid data interception.

1. How Wi-Fi Calling Works: Technical Basics

Technology Voice over Wi-Fi (VoWiFi) based on the protocol IMS (IP Multimedia Subsystem), which integrates voice calls into IP networks. When you make a call over Wi-Fi, your smartphone establishes a secure connection to the operator's server, which then routes the call like a regular mobile phone. This allows you to:

• 📞 Keep your real phone number (unlike messengers, where your nickname is displayed).
• 🔄 Automatically switch between Wi-Fi and cellular networks without losing connection (if supported by your carrier) Seamless Handover).
• 🌍 Make calls abroad without roaming (if connected to your home Wi-Fi).

It is important to understand that VoWiFi - it's not the same as VoIP (calls through applications like Skype or Zoom). Main differences:

A critical detail: not all operators support VoWiFi in Russia. As of 2026, Beeline, MegaFon, MTS, and Tele2 actively offer the technology, but connection conditions may vary depending on the plan and region.

2. Step-by-step setup of VoWiFi on Android

On Android The process for enabling Wi-Fi calling depends on the OS version and the manufacturer's operating system. Below are general instructions that will work for most devices. Android 10 and newer (including Samsung One UI, Xiaomi MIUI, Google Pixel).

If your smartphone runs a custom firmware or has an older version of Android (below 9.0), VoWiFi may not be supported. Check this in the settings or on the manufacturer's website.

Update your firmware to the latest version|

Connect to a stable Wi-Fi network|

Go to Settings → Connections → Mobile Network → Wi-Fi Calling|

Turn on the Wi-Fi Calling switch |

Select Wi-Fi Priority or Wi-Fi Only mode (if available)|

Reboot your phone to apply changes-->

Instructions for popular brands

• 📱 Samsung: Settings → Connections → Mobile networks → Wi-Fi callingOn some models (for example, Galaxy S22) the option is hidden in Additional settings.
• 📱 Xiaomi/Redmi/Poco: Settings → SIM cards & mobile networks → [Select SIM] → Wi-Fi callingOn . MIUI 14 Activation may be required in the operator menu.
• 📱 Google Pixel: Settings → Network & Internet → Mobile network → Advanced → Wi-Fi calling.
• 📱 Huawei/Honor: Settings → Wireless & networks → Mobile networks → Wi-Fi callingSome models require an update. Huawei Mobile Services.

Important: After turning on VoWiFi, an icon may appear on the phone screen Wi-Fi Calling or VoWiFi in the status bar. If it's not there, check if your carrier supports the technology.

3. Setting up VoWiFi on iPhone (iOS)

On iPhone the process is simpler thanks to a unified interface iOSThe technology is supported on all models starting from iPhone 6 (subject to upgrade to iOS 12 and newer). Here's how to enable Wi-Fi calling:

1. Open Settings → Cellular.
2. Select your SIM card (if you have more than one).
3. Tap on the item Wi-Fi calling.
4. Activate the switch Wi-Fi calling on this iPhone.
5. Enable the option When connected to Wi-Fi (recommended to save battery power).

A notification from your operator will appear on the screen asking you to confirm activation. After that, the following message will appear in the status bar (next to the network indicator): Wi-Fi or a tube icon with waves.

Features for iPhone:

• 🔄 If you use eSIM, VoWiFi can only work on the main line (check in the settings) Cellular → Primary SIM).
• 🌐 When roaming Apple Automatically prioritizes Wi-Fi if your carrier supports this feature.
• ⚡ On iOS 16 and newer option added Wi-Fi calling for other devices (for example, for iPad or Mac through Continuity).

What if there is no Wi-Fi Calling option on iPhone?

If the item is not in the settings, it means one of three things:

1. Your operator does not support VoWiFi (check on the official website).

2. The SIM card is not activated for this service (contact support).

3. The phone is running a beta version of iOS with a bug (update the firmware to a stable version).

4. VoWiFi vs. VoLTE: Which is Better and When to Use It

Along with VoWiFi There is another technology for improving voice communication - VoLTE (Voice over LTE). Both allow calls in the format HD voice, but they work differently. Here are the key differences:

When to use VoWiFi:

• 🏠 At home or in an office with poor 4G coverage but good Wi-Fi.
• ✈️ When traveling abroad (saving on roaming).
• 🔋 When the battery is low (VoWiFi uses less energy than VoLTE).

When is VoLTE better:

• 🚗 When moving (for example, in a car), where Wi-Fi is unstable.
• 📶 In places with excellent 4G/5G coverage.
• 🎤 For maximum sound quality (VoLTE often supports the codec EVS for super clear voice).

5. Top 5 operators in Russia with VoWiFi support (2026)

Not all Russian operators offer Wi-Fi calling, and those that do may have tariff or regional restrictions. Below are updated materials as of early 2026 (check details in your personal account or with support).

⚠️ Attention: VoWiFi connection terms are subject to change. For example, MegaFon previously required the "Wi-Fi Calling" option to be activated for 50 rubles/month, but since 2026, it has become free for most plans. Check the current plans in your personal account.

How to connect to VoWiFi from your operator:

1. Make sure your plan supports this feature (see table above).
2. Activate the option:
   • 📱 MTS: send an SMS with text WIFI to the number 111.
   • 📱 Beeline: dial *110*181# and call.
   • 📱 Megaphone: dial *105*555# or activate in your personal account.

Restart your phone and check if the VoWiFi icon appears.

6. Common problems and their solutions

Even after proper setup, Wi-Fi calling may still experience issues. Here are some common issues and how to fix them:

Problem 1: The Wi-Fi Calling option is grayed out

Possible reasons:

• 🔌 The SIM card does not support VoWiFi (for example, virtual operators like SberMobile or Tinkoff Mobile).
• 📵 The operator does not provide the service in your region.
• 🔄 Services are disabled on the phone IMS (check in Settings → Applications → System → IMS Service).

Solution: Try inserting the SIM card into another phone that supports VoWiFi. If the option appears, the problem is with your device (update the firmware).

Problem 2: Calls are dropped or the sound quality is poor

Reasons:

• 📶 Low Wi-Fi speed (less than 1 Mbps).
• 🔄 Frequent reconnections to the router (for example, due to a weak signal).
• 🛡️ Ports are blocked by your operator or internet provider.

Solution:

1. Connect to a 5 GHz network (if your router is dual-band).
2. Disable traffic saving in Wi-Fi settings.
3. Check if yours is blocked VPN voice traffic (turn it off during the call).

Problem 3: VoWiFi doesn't work when roaming

⚠️ Attention: Not all operators allow VoWiFi use abroad. For example, Beeline blocks the feature in some countries due to agreements with local providers. Check with your operator for the list of permitted countries.

Solution: Before the trip:

1. Make sure data roaming is turned on (even if you don't plan to use it).
2. Download your operator's app (for example, "My MTS") - sometimes VoWiFi only works through it.
3. Check your APN settings: your operator's roaming profile must be specified.

7. Wi-Fi Call Security: How to Protect Your Conversations

Wi-Fi calls are encrypted, but vulnerabilities still exist. The main risks are:

• 🕵️ Interception of traffic on public Wi-Fi (in cafes, airports).
• 🔄 Man-in-the-middle (MITM) attacks when connecting to fake access points.
• 📡 Metadata leakage (numbers, call durations) through protocol vulnerabilities IMS.

How to secure VoWiFi:

1. 🔒 Use VPN with support IKEv2/IPsec or WireGuard (For example, ProtonVPN, NordVPN). This will not degrade the quality of the connection, but will protect against eavesdropping.
2. 🚫 Avoid public Wi-Fi for important calls. If necessary, connect via mobile hotspot (distribution from another phone).
3. 🔄 Update your smartphone firmware regularly – manufacturers patch vulnerabilities in modules IMS.
4. 🛡️ Disable it in your router settings WPS and enable encryption WPA3.

VoWiFi Security Myths:

• ❌ "VoWiFi is less secure than regular calls" wrongBoth methods use encryption, but VoWiFi is vulnerable to attacks on Wi-Fi rather than the cellular network.
• ❌ "VPN completely anonymizes calls" — wrongA VPN hides your IP, but the operator still sees your number and metadata.

8. VoWiFi Alternatives: When Standard Methods Don't Work

If your carrier doesn't support VoWiFi or you're experiencing unresolved issues, consider alternatives:

When to use alternatives:

• 🌍 For international calls (VoIP is cheaper than VoWiFi when roaming).
• 📵 If you have a virtual operator without VoWiFi support.
• 🔧 For advanced users who need to record calls or integrate them with CRM.

⚠️ Caution: When using SIP telephony Your real phone number may not be visible to the recipient when using third-party VoIP apps or other services. This can raise suspicions among banks or customer support services (they often block calls from "gray" numbers).

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. Without a SIM card, you can only use VoIP apps (e.g. WhatsApp), but they are not linked to your phone number.

❓ Why isn't VoWiFi working on my phone even though my carrier supports it?

The reasons may be as follows:

1. Outdated Android/iOS version (update firmware).
2. The SIM card is not activated for VoWiFi (contact your operator's support).
3. Services are disabled on the phone IMS (check in system application settings).
4. Your operator is blocking VoWiFi for your plan or region.

For diagnostics, try inserting the SIM card into another supported phone.

❓ Is it possible to use VoWiFi and VoLTE at the same time?

Yes, many modern smartphones (for example, iPhone 13+ or Samsung Galaxy S22+) automatically switch between technologies depending on conditions. For example, if you leave a Wi-Fi zone, the call will continue to connect via VoLTE without interruption.

❓ How much data does VoWiFi use?

A Wi-Fi call consumes about 0.5–1 MB/minute (depending on the codec). For comparison:

• 📞 A normal call via VoLTE: ~0.3 MB/minute.
• 💬 WhatsApp call: ~0.8–1.5 MB/minute.

With a plan with unlimited internet, this isn't a big deal, but if you have limited traffic, keep the cost in mind.

❓ Is it possible to make calls over Wi-Fi on a laptop or tablet?

Yes, but with some reservations:

• 📱 On tablets with a SIM card (For example, Samsung Galaxy Tab S8) VoWiFi is configured in the same way as on a smartphone.
• 💻 On laptops or PC you can use:
• Operator applications (for example, “My MTS” for Windows).
• VoIP clients with number binding (for example, Zoiper with a SIP account).

Full-fledged VoWiFi (like on smartphones) is not available on laptops—only alternative solutions.