Wi-Fi Calling on iPhone 10: How to Enable and Set Up VoWiFi in 5 Minutes

Technology Wi-Fi calling (VoWiFi) on iPhone 10 Allows you to make and receive calls even without a mobile network—all you need is a stable internet connection. This feature is especially useful in areas with poor cellular coverage, such as basements, country houses, or when traveling abroad where roaming is expensive. However, many users encounter difficulties setting it up: in some cases, the option is hidden in the menu, in others, it requires operator support, and sometimes, a firmware update is required.

In this article we will look at All ways to enable VoWiFi on iPhone 10 — from basic settings to troubleshooting common errors. You'll learn which operators in Russia and the CIS support the technology, how to check your plan's compatibility, and what to do if the activation button is grayed out. We've also tested the feature on different iOS versions and prepared a checklist for quickly troubleshooting.

What is VoWiFi and why is it needed on the iPhone 10?

VoWiFi (Voice over Wi-Fi) is a communications standard that transmits voice calls over the Internet Protocol instead of traditional cellular networks. iPhone 10 the technology works according to the protocol IMS (IP Multimedia Subsystem), which guarantees high sound quality and minimal latency. Key benefits:

• 📶 Connection stability in places where the mobile signal is weak or absent (for example, in the subway or densely populated areas).
• 💰 Saving on roaming: Wi-Fi calls are not charged as international calls if you are abroad.
• 🔄 Smooth transition between Wi-Fi and cellular network during a call (if the operator supports it) eSIM or Wi-Fi Calling+).
• 📱 Work without a SIM card: You can make calls via Wi-Fi even with an eSIM installed or without a physical card (linked to an operator account).

It is important to understand that VoWiFi is not the same as instant messengers (WhatsApp, Telegram, Viber). Wi-Fi calling on iPhone uses your primary phone number, not your app account. This means:

• ✅ Call history is saved in the standard application Telephone.
• ✅ SMS can also be sent via Wi-Fi (if the operator supports it) SMS over Wi-Fi).
• ❌ It doesn't work for emergency calls (112, 911) - they always go through the cellular network.

⚠️ Attention: Some carriers block VoWiFi for corporate plans or older SIM cards (issued before 2018). If the feature doesn't activate, request a SIM replacement from your provider.

Requirements for VoWiFi on iPhone 10

Before you set up Wi-Fi calling, make sure your iPhone 10 and the tariff plan meets the minimum requirements. Here's the full checklist:

iOS version 12.1 or later (optimally 15.0+)

A SIM card from a VoWiFi-enabled carrier (list below)

Wi-Fi router with 802.11n/ac protocol (5 GHz recommended)

No VPN or proxy in network settings

Activated "Wi-Fi Calling" service in your operator's personal account-->

Pay special attention to the telecom operatorAt the time of writing, VoWiFi is officially supported by the following providers in Russia and the CIS:

• 🇷🇺 Russia: MTS, Beeline, MegaFon, Tele2, Yota, Tinkoff Mobile.
• 🇺🇦 Ukraine: Kyivstar, Vodafone, Lifecell.
• 🇰🇿 Kazakhstan: Beeline KZ, Kcell, Tele2 KZ.
• 🇧🇾 Belarus: A1, MTS BY, life:).

Important: Operators may limit VoWiFi for plans with unlimited data or corporate lines. For example, MTS blocks the feature for its "Super MTS" and "Business Tariff Plan" plans.

Yes, everything works.

No, the function is not available.

I don't know, I haven't tried it.

I use another method (specify in the comments)-->

Step-by-step instructions: how to enable VoWiFi on iPhone 10

If all requirements are met, proceed to setup. The process takes no more than 5 minutes:

1. Open Settings → Cellular communications.

2. Tap on the item Wi-Fi calling (if it is not there, see the "Troubleshooting" section).

3. Activate the switch Wi-Fi calling on this iPhone.

4. Confirm the activation by pressing Turn on in a pop-up window.

5. Wait for activation (may take up to 2 minutes). Icon Wi-Fi in the status bar will turn blue.

After activation, the inscription will appear in the top bar of the screen next to the network indicator. Wi-Fi (if you are connected to the internet). To check the operation:

• 📞 Call another number and make sure that the status bar is lit Wi-Fi.
• 🔄 Turn off mobile data and try the call again—it should go through Wi-Fi.

Additional settings (optional):

• 🔄 Settings → Cellular → Wi-Fi Calling → Update over Wi-Fi - Enable to automatically update the location of emergency services.
• 📱 Settings → Phone → Calls on other devices — Allow calls via iPad or Mac (requires one Apple ID).

What to do if VoWiFi won't turn on or isn't working

If the button Wi-Fi calling If the function is not active or does not work after activation, please check the following:

1. Problems with the operator

• 📱 Outdated SIM card: Contact a communications store to replace it with a new one (especially if the card is older than 3 years).
• 💳 Tariff restrictions: VoWiFi may be blocked for prepaid cards or corporate lines. Check your operator account.
• 🌍 Roaming: Some operators disable VoWiFi abroad. For example, Beeline blocks the service in CIS countries except Russia.

2. iPhone Problems

• 📲 Outdated firmware: Update iOS to the latest version (Settings → General → Software Update).
• ⚙️ Reset network settings: Go to Settings → General → Transfer or reset → Reset → Reset network settings.
• 🔄 Reboot: Sometimes simply turning the phone off and on helps.

3. Wi-Fi problems

• 📶 Weak signal: VoWiFi requires a stable connection (speed from 2 Mbps). Check the speed on Speedtest.
• 🔒 Router firewall: Disable packet filtering or add your iPhone to the exceptions.
• 🌐 DNS servers: Try using Google DNS (8.8.8.8) or Cloudflare (1.1.1.1).

Diagnostics via code:

To check the VoWiFi status, enter in the app Telephone combination:

##4636##

Then go to Phone information and find the line VoWiFi provisionedIf it's there 1 — the function is active.

⚠️ Attention: On iPhone 10 with two SIM cards (eSIM + physical SIM) VoWiFi can only work on one line. To change the priority, go to Settings → Cellular → Primary SIM Card.

How to make Wi-Fi calls without a SIM card on iPhone 10

Yes, it's possible! If you don't have a physical SIM card, but you have an active eSIM or a number linked to your Apple ID, you can use VoWiFi. Here's how it works:

1. Make sure your carrier supports it. eSIM with VoWiFi (list: MTS, Beeline, MegaFon in Russia; Vodafone, Lifecell in Ukraine).

2. Activate your eSIM through your operator's official app or website (e.g. My MTS, My Beeline).

3. After activating the eSIM, go to Settings → Cellular → Wi-Fi Calling and turn on the function.

4. Remove the physical SIM card (if you had one) and restart your iPhone.

Now you can make calls via Wi-Fi without a SIM card! Restrictions:

• ❌ You cannot use two numbers at the same time (if you had dual-SIM).
• ❌ Some operators require periodic authorization via the cellular network (once every 30 days).

How can I check if a call is made via Wi-Fi and not a cellular network?

While you're talking, look at the top bar of your screen. If you see the text next to the network indicator, Wi-Fi (in blue), it means the call is being made over the internet. If there is no indication, it's using a cellular connection. You can also temporarily disable mobile data in Control center and try to call: if the call goes through, then VoWiFi is working.

VoWiFi vs. Messenger: Which is Better for Wi-Fi Calling?

Many users ask: why set up VoWiFi if you can make calls via WhatsApp or Telegram? Let's compare:

When to choose VoWiFi:

• 📞 You need to make calls from your main number (for example, for work).
• 🏢 You often find yourself in places with poor coverage but good Wi-Fi.
• 🌍 Traveling abroad and want to avoid roaming charges.

When to choose messengers:

• 🌐 Your interlocutors also use WhatsApp/Telegram.
• 📵 You don't have an active SIM card (for example, only a Wi-Fi tablet).
• 🎤 You need group audio calls (VoWiFi does not support them).

VoWiFi Security: Myths and Reality

Many users fear that Wi-Fi calls are less secure than cellular calls. Let's debunk the main myths:

Myth 1: "VoWiFi can be eavesdropped on via public Wi-Fi."

✅ Reality: Calls are encrypted using the protocol SRTP (Secure Real-Time Transport Protocol), the same as that used in banking apps. Conversations can only be listened to with access to the operator's servers.

Myth 2: "VoWiFi uses more battery"

✅ Reality: Power consumption is comparable to regular phone calls. However, if the Wi-Fi signal is weak, the iPhone will constantly switch between networks, which can drain the battery faster.

Myth 3: "My carrier can see what websites I visit via VoWiFi."

✅ Reality: VoWiFi transmits voice traffic onlyInternet traffic (websites, applications) is sent separately and does not reach the operator (unless you use their access point).

How to further secure VoWiFi:

• 🔐 Use VPN (but keep in mind that this may degrade the quality of the connection).
• 📡 Turn off Automatic connection to Wi-Fi networks in the settings (Settings → Wi-Fi).
• 🔄 Update iOS regularly—Apple patches vulnerabilities in its communication protocols.

FAQ: Frequently asked questions about VoWiFi on iPhone 10

❓ Can I use VoWiFi on an iPhone 10 with two SIM cards?

Yes, but only on one line at a time. To select the primary SIM for VoWiFi, go to Settings → Cellular → Primary SIM Card and enter the desired number. The second SIM will only use the cellular network.

❓ Why does VoWiFi only work in some countries?

Carriers limit this feature due to legal requirements (for example, in the EU, VoWiFi is required to support emergency calls, while in some Asian countries this is optional). Roaming restrictions may also apply. Check with your carrier before traveling.

❓ How do I disable VoWiFi on iPhone 10?

Go to Settings → Cellular → Wi-Fi Calling and deactivate the switch. You can also disable the function temporarily by Control center (hold the icon Airplane mode and turn it off Wi-Fi).

❓ Does VoWiFi consume internet traffic?

Technically yes, but it's not billed like regular internet. Your carrier counts these calls as minutes on your plan (or unlimited minutes, if applicable). VoWiFi traffic isn't included in your internet plan.

❓ Is it possible to use VoWiFi on iPhone 10 without activating a SIM card?

No, VoWiFi requires an active SIM card (physical or eSIM) linked to your carrier account. Without a SIM card, the feature will be disabled, even if you're connected to Wi-Fi.