Modern mobile communications often face physical obstacles: thick walls of office buildings, basements of shopping malls, or remote holiday villages create "dead zones" where cell tower signals simply cannot penetrate. In such situations, technology comes to the rescue. VoWiFi (Voice over Wi-Fi), which allows you to make voice calls and send SMS messages over the internet using a regular SIM card without installing additional apps like WhatsApp or Telegram. This feature is especially important for MegaFon subscribers, as it allows them to stay connected even in areas where regular GSM signal is completely absent, while maintaining high-quality sound and a stable connection.
Activating this service does not require complex equipment or in-depth knowledge of network technologies, but the setup process has its own nuances depending on your smartphone model and operating system. Wi-Fi Calling It's not just an alternative communication method, but a complete replacement for traditional telephony, integrated into your device's standard dialing system. In this article, we'll cover in detail how to prepare your device, where to find the necessary switches in the menu, and what to do if the feature doesn't work the first time.
It's worth noting that several basic conditions must be met for this technology to work successfully. Ignoring them will result in the desired option simply not appearing in the list of available options. MegaFon is constantly updating its list of supported devices and software requirements, so it's important to ensure your device is ready to work with modern communication standards. Below, we'll cover each step in detail to ensure you have no questions about setup.
⚠️ Attention: Tariff plans and service terms are subject to change by the operator. Before activating, make sure your plan has no restrictions on VoWiFi use and check the latest information in your personal account or the MegaFon app.
What is VoWiFi and how does it work?
Technology VoWiFi This technology transmits voice traffic over IP protocols, similar to how data is transmitted when browsing websites, but prioritizes voice packets to minimize latency. Unlike messaging apps, which require a separate app and an account with the other person, MegaFon Wi-Fi calls are made from your regular phone number, and incoming calls are handled as usual. This is especially convenient for those who don't want to split their communications across different platforms and prefer a single contact list.
The smartphone automatically switches to Wi-Fi for voice calls as soon as it detects a weak cellular signal or if wireless connection priority is set in the settings. The subscriber can move between coverage areas: if you leave your home with Wi-Fi coverage, the phone will seamlessly switch to a regular cellular network without interrupting the call, provided the network and device support this feature. The sound quality often surpasses standard HD Voice, delivering crystal-clear audio.
It is important to understand the difference between VoLTE And VoWiFiThe first technology works over 4G networks, while the second uses any available internet connection. MegaFon is actively developing both infrastructures, but Wi-Fi Calling is a lifesaver in buildings with shielded coverage or in areas with poor tower density. This option is billed according to your main plan, meaning minutes are consumed from your package, just like a regular call, and internet traffic may not be consumed unless it is billed separately by the operator.
- 📶 Allows you to make calls in areas with poor cellular signal but good Wi-Fi.
- 💰 Calls are priced according to your basic plan, with no hidden fees.
- 🌍 Works abroad as incoming calls (free to receive) if there is Wi-Fi.
- 📱 Doesn't require installing third-party applications; the built-in dialer is used.
Checking device and SIM card compatibility
Before proceeding to the menu settings, you need to make sure that your hardware and software are capable of supporting the technology. VoWiFiNot all smartphones, even those released in recent years, have native support for this feature for Russian carriers, as device certification and the appropriate firmware are required. MegaFon provides a regularly updated list of compatible models, including popular brands such as Apple, Samsung, Xiaomi, Huawei, and Honor.
The operating system version is critical: older versions of iOS or Android may not contain the necessary profiles to work with the operator's networks. The SIM card must also be of the standard USIM (4G/5G), older mini-SIM cards, or older cards without LTE support may not work properly with the service. If your SIM card was purchased many years ago, you may need to replace it free of charge at a mobile phone store or via courier.
List of popular compatible models
Apple iPhone (starting with the 5s model and newer, iOS 12+), Samsung Galaxy (S, A, Note series of recent years), Xiaomi (flagship models and the Redmi Note series), Huawei and Honor (models with support for Google services or the latest EMUI).
Compatibility checking is often performed automatically: if the phone detects the carrier's network and supports the feature, the corresponding toggle will appear in the menu. However, if you recently changed phones, you should manually check for system updates. Sometimes VoWiFi support is added by the carrier via a Carrier Settings update, which arrives automatically on the phone when the internet is available.
| Parameter | VoWiFi requirement | Where to check |
|---|---|---|
| operating system | iOS 12+ / Android 8+ | Settings → About phone |
| SIM card type | 4G LTE (USIM) | Visually (size) or in the salon |
| Service status | Connected | Personal account / USSD |
| Phone model | Certified by MegaFon | Official website of the operator |
| Internet | Stable Wi-Fi | Icon in the status bar |
How to activate the service on the operator's side
Even if your phone is technically ready, the service itself must be activated in your subscriber profile on the MegaFon network. By default, it may be enabled automatically on new plans, but on older archived plans, it often needs to be activated manually. This can be done in several ways, without visiting a sales office or calling the call center.
The fastest way is to use a USSD command, which works even without internet access, but with the SIM card turned on. Enter the code on your phone's keypad. *105*0037# and press the call button. You will receive an SMS message confirming activation or information about the current service status. You can also use the shortcut *105*4# to access the main services menu, where you can find the desired option in the "Calls" category.
A more convenient and informative method is to use the MegaFon mobile app or the web version of your personal account. In the app, go to the "Services" or "Communication Settings" section, find the "Calls" category, and toggle the "Wi-Fi Calling" slider to the on position. Here you can also see whether the service is available for your current plan and read the current terms.
⚠️ Attention: After activating the service with your carrier, changes may take anywhere from 5 minutes to several hours to take effect. If the toggle doesn't appear immediately, try restarting your device or toggling airplane mode on and off.
Setting up Wi-Fi Calling on iPhone (iOS)
Apple smartphone owners are fortunate to have the simplest and most unified setup procedure, as the iOS interface is the same for all models starting with the iPhone 5s. First, make sure your device is running the latest version of iOS by going to Settings → General → Software UpdateAfter this, make sure that LTE data and voice calling are enabled in the cellular section. While this isn't always strictly necessary for VoWiFi to work, it's recommended for better integration.
The main settings are made in the menu Settings → Phone → Wi-Fi Calling. Toggle the "Wi-Fi Calling on This iPhone" switch to the "On" position. IncludedThe system may request address verification for emergency services (E911), which is a standard security procedure required by VoWiFi protocols. Enter a valid address (any valid address in your city will do). This won't affect anything in Russia, but it is necessary to activate the feature.
After switching on, the following message will appear in the status bar (top right or left, depending on the model) next to the operator’s name: Wi-Fi or Megafon Wi-FiThis means the phone is ready to make and receive calls over the wireless network. If you're within range of a known Wi-Fi network, the phone will automatically prefer it over the cellular network for voice calls, providing better call quality.
Instructions for Android smartphones
Android devices have a more diverse settings menu, as each manufacturer (Samsung, Xiaomi, Honor) may name the options differently and arrange them in the interface. However, the general procedure remains similar. First, you need to activate the service with your carrier (as described above), and then go to the smartphone's settings.
On most modern smartphones the path looks like this: go to Settings → SIM cards and mobile networks (or "Connections," "Mobile Network"). Select your MegaFon SIM card. In the menu that opens, find "Wi-Fi Calling" and enable it. On some Samsung models, this option may be found in the "Phone" app (dialer) via the three-dot menu → Settings.
It's important to note that some Xiaomi or Huawei models may require additional activation via the engineering menu or special codes if the standard switch is hidden by the provider. Also, make sure mobile network mode is enabled in the settings. 4G/LTEIf the switch is grayed out or missing, your current firmware may not be certified for VoWiFi on MegaFon networks. Your only option is to wait for a system update or upgrade to a new phone.
☑️ Android Setup Checklist
Troubleshooting and troubleshooting
Despite the simplicity of the technology, users often encounter situations where the feature doesn't work or is unstable. One common issue is the absence of the VoWiFi icon in the status bar after all the settings have been set up. In this case, a complete reset of network settings often helps. On iPhones, this is done via Settings → General → Transfer or reset iPhone → Reset → Reset Network SettingsOn Android, the path may differ, but is usually located in the "System" or "General Settings" section.
Another common cause is using public Wi-Fi networks with browser-based authentication (captive portal). VoWiFi technology requires a secure connection, so calls may not connect in cafes, airports, or hotels where you need to enter a phone number or receive an SMS to access the internet. Home routers and mobile hotspots from another phone work without problems. Also, make sure the ports required for the IMS protocol (usually 5060 and 5061 UDP/TCP) are not blocked on the router.
If the audio is choppy or echoes, the problem may be low internet speed or high bandwidth usage. VoWiFi requires a stable connection with a ping of no more than 150-200 ms. Try moving closer to the router or turning off other bandwidth-consuming devices (torrents, 4K streaming). Switching the router's frequency from 2.4 GHz to 5 GHz can sometimes help to reduce interference.
⚠️ Attention: When calling emergency services (112, 102, 103) via Wi-Fi, the operator may not see your exact geolocation, as the call is routed via your IP address. Always provide the dispatcher with your exact address, especially if you are away from home.
Frequently Asked Questions (FAQ)
Do you charge for Wi-Fi calls when roaming?
Incoming calls via Wi-Fi while roaming are free, as they are considered incoming calls to a Russian number. Outgoing calls are charged according to your plan, but are often cheaper than standard roaming, as the call is made as if it were from your home network (this depends on the specific terms of your MegaFon plan; it's best to check before traveling).
Does making calls use up internet traffic?
Traffic used directly for voice transmission is usually not charged and is not deducted from your data plan if you have a VoWiFi service. However, the mere act of connecting to Wi-Fi may consume a minimal amount of background data. VoWiFi traffic is generally free on MegaFon.
Why does the Wi-Fi Calling icon disappear during a call?
This could mean the phone has automatically switched to the cellular network (if the signal has improved), or the Wi-Fi quality has degraded so much that the phone can't support voice calls and is dropping the connection or switching to 3G/2G. Check the stability of your wireless network.
Can I use VoWiFi if I have 0 rubles in my account balance?
No, to register on the IMS network and activate the service with the operator, you must have a positive balance or minute bundles. If your balance is empty, you won't be able to make calls over Wi-Fi.