Wi-Fi Calling: How to Set Up and Use on Android and iPhone

Calls via Wi-Fi Mobile Wi-Fi is a technology that allows you to make and receive calls even without a mobile network. A stable internet connection is enough to stay connected in areas with poor coverage: basements, subways, country houses, and even abroad. This feature is available on most modern smartphones, but many users still don't know how to activate it or what pitfalls it may encounter.

In this article we will look at how to set up Wi-Fi Calling on Android And iPhone, which operators support the technology in Russia, how much it costs, and how to solve common problems. You'll also find out whether you can make calls using Wi-Fi without a SIM card, how it works in roaming, and what alternative apps will help if your operator doesn't support the feature.

What is Wi-Fi calling and how does it work?

Technology Wi-Fi Calling (or VoWiFi) allows voice calls to be transmitted over the Internet Protocol instead of traditional mobile networks (2G/3G/4G/5G). The main advantage is stable connection in areas where the operator's signal is weak or absent. For example, in underground parking lots, thick-walled buildings, or remote areas.

When calling through Wi-Fi Your voice is converted into digital data packets, which are transmitted over the internet and then converted back into voice at the subscriber's end. For the operator, such a call is no different from a regular one—it's on the same network and is charged according to the same rules (unless a special rate is used).

• 📶 Advantages: connection in areas without coverage, better sound quality (with good Wi-Fi), battery saving (no need to search for a network).
• ⚠️ Flaws: Dependence on internet speed, possible delays (lag) with a poor connection, not all operators support the technology.
• 🌍 Where does it work: in Russia - MTS, Beeline, Megaphone And Tele2 (with restrictions), abroad - from most major operators.

It is important to understand that Wi-Fi Calling - this is not the same as calls via instant messengers (WhatsApp, Viber, TelegramIn the latter case, you're calling via the messenger protocol, and such a call won't be recorded in your mobile call history and is often billed as internet traffic. Wi-Fi Calling It is integrated into the standard phone application and uses your mobile number.

Which phones and carriers support Wi-Fi Calling?

Function Wi-Fi Calling available on most smartphones released after 2018, but there are some nuances. Here are the basic requirements:

• 📱 Android: starting with version Android 9 (Pie) and newer. Supported by almost all flagships Samsung, Google Pixel, Xiaomi, Huawei (except for models without Google services).
• 🍎 iPhone: starting from iPhone 6 and newer (required) iOS 12 or higher).
• 📡 Operators in Russia: MTS, Beeline, Megaphone And Tele2 officially support the technology, but there may be tariff or regional restrictions.

Before setting up, check if your operator supports it. VoWiFiFor example, MTS The function is available on tariffs with unlimited minutes, and Tele2 — For corporate clients only. Current terms and conditions can be found in your personal account or by contacting the operator.

⚠️ Attention: Some operators may block Wi-Fi Calling for SIM cards issued before 2020If the function is not activated, try replacing the card with a new one (format nano-SIM or eSIM).

How to enable Wi-Fi Calling on Android

Setting up on Android It may differ depending on the smartphone manufacturer, but the general algorithm is as follows:

1. Open Settings → Network and Internet (or Connections).
2. Select Mobile network → Additionally (or Wi-Fi Calling).
3. Activate the switch Wi-Fi calling or VoWiFi.
4. If necessary, confirm the emergency address (required for 911/112).

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

If the option is missing, check:

• 🔄 Update your phone firmware to the latest version.
• 📋 Insert the SIM card into the slot SIM 1 (on some models Wi-Fi Calling (works only with the main card).
• 🔧 Reset network settings: Settings → System → Reset → Reset network settings.

Update your phone's firmware

Check operator support

Install the SIM card into SIM slot 1.

Connect to a stable Wi-Fi connection

Reset network settings (if it doesn't work)-->

⚠️ Attention: On phones Huawei without Google services (HMS) function Wi-Fi Calling This feature may be unavailable or may only work with Chinese carriers. Check the model on the manufacturer's website.

How to enable Wi-Fi Calling on iPhone

On iPhone Setup is simpler, but requires updating your operator settings. Follow these instructions:

1. Go to Settings → Cellular communications → Wi-Fi calling.
2. Activate the switch Wi-Fi calling on this iPhone.
3. If prompted, confirm that you want to enable the feature.
4. If necessary, update your operator settings: Settings → General → About → Carrier settings.

If the option is missing:

• 📱 Make sure yours iPhone updated to the latest version iOS.
• 🆔 Check that the SIM card is activated and supported VoLTE (calls over 4G).
• 🔄 Restart your phone and try again.

On iPhone With dual-SIM (two SIM cards) Wi-Fi Calling can only work with one of them. To select the primary SIM for Wi-Fi calling, go to Settings → Cellular → Primary SIM Card.

Is it possible to make calls over Wi-Fi without a SIM card?

Calling via Wi-Fi without a physical SIM card is possible, but only when using eSIM or special applications. Standard Wi-Fi Calling Requires an active SIM card from the operator, as the call is routed through their network. However, there are workarounds:

• 📲 eSIM: A virtual SIM card allows you to make calls over Wi-Fi without a physical chip. Supported on iPhone XS and newer, as well as on flagships Android (Samsung Galaxy S20+, Google Pixel 3 and others).
• 💬 Messengers: WhatsApp, Viber, Telegram allow you to make calls over Wi-Fi without a SIM card, but the subscriber must also use the same messenger.
• 📞 IP telephony: Services like Google Voice or Skype issue a virtual number for calls over the Internet.

If you need to make calls temporarily without a SIM (for example, while traveling), the easiest way is to use WhatsApp or TelegramSuitable for a complete replacement of mobile communications eSIM from operators that support Wi-Fi Calling (For example, MTS or Beeline).

How to activate eSIM for Wi-Fi Calling?

To use eSIM To make calls over Wi-Fi, first get a virtual SIM from your carrier (for example, through an app My MTS or Beeline.Pro). Then add it to your phone:

1. On iPhone: Settings → Cellular → Add plan → scan the QR code from the operator.
2. On Android: Settings → Network & Internet → Mobile network → Add operator → select eSIM.

After activation, turn on Wi-Fi Calling For eSIM the same as for a regular SIM card.

How much does a Wi-Fi call cost: pricing and data usage

One of the most frequently asked questions: How much does a call over Wi-Fi cost? The answer depends on your tariff and operator:

• 📞 In the home region: Wi-Fi calls are charged like regular mobile calls. If you have an unlimited calling plan, you won't be charged.
• 🌎 In roaming: The rules are different here. For example, MTS And Beeline they don't charge extra for Wi-Fi Calling in roaming, if you have a minutes package enabled. But Megaphone may charge funds at international roaming rates.
• 📶 Traffic consumption: One minute of conversation consumes on average 0.5–1 MB traffic. With unlimited internet, this isn't a big deal, but with a limited plan, it's worth considering.

Important: Some operators may block Wi-Fi Calling in certain countries due to local regulatory restrictions. For example, in UAE or China The function may not work even when connected to local Wi-Fi.

⚠️ Attention: If you use Wi-Fi Calling When roaming, check with your operator to see if minutes are being deducted from your home region's package. For example, Tele2 Wi-Fi calls while roaming may be charged as local calls rather than international calls.

Operator	Cost in the home region	Roaming costs	Traffic consumption (per 1 min)
MTS	According to the tariff (often unlimited)	Free with included minutes package	~0.7 MB
Beeline	According to the tariff	According to international roaming rates	~0.5 MB
Megaphone	According to the tariff	According to roaming tariffs (may be blocked)	~1 MB
Tele2	For corporate clients only	At corporate rates	~0.8 MB

What to do if Wi-Fi Calling isn't working

If you have enabled the feature, but calls are still being processed Wi-Fi If the problem does not pass, check the following points:

• 🔌 Wi-Fi connection: Make sure your phone is connected to the network and the internet is working (check the speed on Speedtest).
• 📵 Flight mode: Turn it off Airplane mode - it blocks all network functions, including Wi-Fi Calling.
• 🔄 Updates: Check if you have the latest firmware and carrier settings updates installed.
• 📶 VoLTE support: Wi-Fi Calling often requires activated 4G calls (VoLTE). Enable it in your mobile network settings.

If the problem persists, try:

1. Restart your phone.
2. Delete and re-add the Wi-Fi network.
3. Reset network settings (Settings → System → Reset → Reset Wi-Fi, mobile networks, and Bluetooth).
4. Contact your operator's support team—the service may not be activated on your SIM card.

On iPhone additional reason for non-working Wi-Fi Calling - incorrect date and time settings. Check that Settings → General → Date & Time option enabled Automatically.

Wi-Fi Calling Alternatives: Internet Calling Apps

If your operator does not support Wi-Fi Calling If the feature isn't working, you can use alternative apps. These allow you to make calls over the internet, but require the caller to be registered with the same service.

• 💬 WhatsApp: Free calls between users WhatsApp via Wi-Fi or mobile data. Quality depends on internet speed.
• 📱 Viber: Supports calls to mobile and landline numbers (paid), as well as free calls between users Viber.
• 📞 Skype: Allows you to call any numbers at the rates Skype (cheaper than international calls through an operator).
• 🌍 Google Voice: Provides an American number for free calls within the USA/Canada and cheap international calls.
• 🔒 Telegram: Encrypted calls, but only between users Telegram.

The advantage of these apps is that they work even without a SIM card; internet access is sufficient. The disadvantage is that the recipient must also use the same messenger, otherwise the call won't go through.

If you need to call regular numbers over Wi-Fi, consider services like Zadarma or Sipnet - They provide virtual numbers and charge calls at low rates.

FAQ: Frequently asked questions about Wi-Fi calling

Is it possible to make calls via Wi-Fi on old phones?

Function Wi-Fi Calling officially supported on smartphones not older than 2018 releaseOn older models (eg, iPhone 5s or Samsung Galaxy S7) it may not exist. The alternative is to use instant messengers (WhatsApp, Viber) or IP telephony applications (Skype, Zoiper).

Will Wi-Fi Calling work if I turn off mobile data?

Yes, Wi-Fi Calling does not require mobile data to be turned on. A Wi-Fi connection is sufficient. However, some operators (e.g., Megaphone) may check for network registration before activating a call, so the mobile network is still activated for a short time.

Can I receive calls on my watch or tablet via Wi-Fi?

On Apple Watch With cellular or iPad With eSIM function Wi-Fi Calling works if they are linked to the same Apple ID as iPhoneOn . Android-devices (for example, Samsung Galaxy Watch or tablets) it depends on the operator - some allow activation Wi-Fi Calling on additional gadgets.

Do Wi-Fi calls get corrupted when the internet connection is poor?

Yes, problems may occur with unstable Wi-Fi. interference, communication breakdowns or audio delaysIf the speed is lower 1 Mbps, it's better to switch to a mobile network. Some phones (for example, iPhone) automatically switch to VoLTE, if the quality of Wi-Fi deteriorates.

Can I use Wi-Fi Calling abroad?

Technically yes, but there are some nuances:

• If you are connected to Russian Wi-Fi (for example, via VPN), the operator can charge minutes as in the home region.
• If you are connected to local Wi-Fi, the operator may regard the call as a roaming call (depending on the tariff).
• In some countries (for example, UAE, China) Wi-Fi Calling may be blocked at the operator level.

Check with your operator for rules before traveling.