The modern pace of life dictates its own conditions, and stable communication is becoming critical, especially in places where cellular network signal is practically non-existent. Technology VoWiFi MegaFon's Voice over Wi-Fi (Voice over Wi-Fi) allows you to make and receive regular voice calls using a wireless internet connection. This solution is ideal for apartments with thick walls, office buildings with shielding, or country houses where only one SIM card has a signal and a router provides stable internet.
The main advantage of this service is that it's completely free for the subscriber, and minutes are billed the same as a standard voice call. You don't need to install third-party apps or ask the other person to do the same—the call is made through your smartphone's default dialer. In this article, we'll cover how to activate the feature, which devices support it, and any setup issues you might encounter.
It's worth noting that connection quality directly depends on the speed and stability of your home or office Wi-Fi router. If the internet connection is weak or congested, voice packets may be lost, leading to distortion or connection interruptions. Therefore, before activating the service, ensure your equipment is working properly and the connection speed is sufficient for real-time voice transmission.
What is VoWiFi technology and how does it work at MegaFon?
Technology VoWiFi This method transmits voice traffic over IP protocols, similar to how instant messaging apps work, but with priority given to voice packets on the operator's network. Unlike calls via WhatsApp or Telegram, it uses your real phone number, and the connection is established with MegaFon base stations through the operator's gateways. This means that you don't even need mobile data or a SIM card in your phone to receive an incoming call; you only need to be logged in to the Wi-Fi network.
The operating principle is based on close interaction between your smartphone, router, and the operator's infrastructure. When you dial a number, your phone, detecting Wi-Fi access and the presence of a configured profile, sends encrypted voice data to MegaFon's servers. From there, the call is routed to the public switched telephone network (PSTN) or another mobile number. For the person on the other end of the line, this process is completely transparent—they see your number and hear your voice in high-quality HD Voice.
⚠️ Attention: VoWiFi technology is not a business equivalent to VoIP telephony. It is a service for individuals that allows them to expand their cellular network coverage, not replace their corporate PBX.
It is important to understand that Megaphone The system monitors the connection quality in its network, but your router is responsible for signal stability in your apartment. If the device is located far from the access point or the signal is blocked by concrete floors, call quality may deteriorate. In such cases, the system may attempt to switch the call to the standard cellular network (handover) if your smartphone and coverage area support it, but this feature is not available on all device models.
Checking smartphone and tariff compatibility
Before attempting to activate the service, you need to ensure that your equipment is technically ready to work with VoWiFi. Not all smartphones, even modern ones, have built-in firmware support for this technology for Russian operators. The list of supported devices is constantly expanding, but the basic requirements remain an 802.11 ac/ax Wi-Fi module and the appropriate manufacturer certification.
Device owners Apple (iPhone) can use the service starting with the iPhone 6 model and above, provided they have the latest version of iOS installed. For Android smartphones, the situation is more complex: support depends not only on the brand, but also on the specific model and regional firmware version. For example, flagship lines Samsung Galaxy, Xiaomi Mi and Redmi series, as well as devices Huawei And Honor most often have the necessary support "out of the box".
When it comes to tariff plans, MegaFon is very loyal. The service is available to subscribers of virtually all archived and current tariffs, including the "Vklyuchaisya," "Teplo," "Zol Doubt" (No Doubt) lines, and corporate solutions. Minutes spent on Wi-Fi calls are deducted from the basic package or charged according to the terms of your tariff; there are no additional subscription fees for internet calling.
There are several ways to check your device's compatibility. The easiest way is to check for a toggle switch in your phone's settings. If you don't see a clear option for VoWiFi, try updating your smartphone's software to the latest available version. Manufacturers often add carrier support through security updates or major OS updates.
Step-by-step instructions: how to enable Wi-Fi calling
The subscriber-side activation process is extremely simplified and doesn't require office visits or calls to customer support. All necessary settings can be configured independently in just a few minutes via your smartphone's menu. However, before beginning the process, please ensure your MegaFon SIM card is inserted into a slot that supports 4G/LTE and that your balance or minute package contains available resources.
The first step is to activate the service in your subscriber profile. This can be done through the MegaFon mobile app or your personal account on the website. Find the "Services" section and under "Communications" or "Calls," select "Wi-Fi Calling." Click "Connect." The system will then send a confirmation message, and your SIM card profile will be updated on the network.
After activation by your carrier, you need to configure the phone itself. The path to the settings may vary slightly depending on the operating system version and the manufacturer's shell. Below is a table of the paths for the most popular brands:
| Brand / OS | Path to setup | Option name |
|---|---|---|
| iPhone (iOS) | Settings → Cellular | Wi-Fi calling |
| Samsung | Settings → Connections → Mobile network | Calling over Wi-Fi |
| Xiaomi / Redmi | Settings → SIM cards and mobile networks | Wi-Fi calling |
| Huawei / Honor | Settings → Wireless & networks → Mobile network | Calling over Wi-Fi |
After turning on the slider in the phone settings, a corresponding indicator should appear at the top of the screen (in the status bar). iPhone this is the inscription "Wi-Fi" next to the operator's name, Android- smartphones - a telephone handset icon with Wi-Fi symbols or the letter "W." If the icon appears, the phone has registered with the operator's IMS network and is ready to make calls.
☑️ Activation checklist
Tariffs and free calls: important nuances
One of the most frequently asked questions concerns the cost of such calls. MegaFon markets the service as free in terms of setup and maintenance, but it's important to understand how traffic is billed. Wi-Fi minutes are deducted from your basic voice package included in your plan. If you have unlimited calls to mobile phones in Russia, then your Wi-Fi calls are also free within that limit.
Roaming is especially important. If you're abroad, VoWiFi technology can be a lifesaver. Incoming Wi-Fi calls to a Russian operator while roaming are often charged as incoming calls in your home region (i.e., free), rather than as incoming calls while roaming. However, rules are subject to change, so be sure to check the terms in the "Roaming" section of your personal account before traveling.
Outgoing calls from abroad via Wi-Fi are charged as outgoing roaming calls if you call local numbers or numbers in third countries. However, if you call a Russian number while abroad and using Wi-Fi, the cost may be significantly lower than the standard roaming rate or in accordance with the terms of your call plan for calls from Russia. This depends on the specific terms of your contract.
⚠️ Attention: When using VoWiFi while roaming, make sure the "Data Roaming" option is disabled in your phone's settings so that the phone does not switch to the local cellular network and charge you for internet traffic.
It's also worth remembering that video calls made through the standard Phone app (if your carrier and device support ViLTE/ViWiFi) may be charged differently than standard voice calls. Make sure you're making a voice call if you want to use your plan's minutes.
Troubleshooting: Why VoWiFi Isn't Working
Despite the ease of setup, users may encounter situations where the feature doesn't activate or calls are dropped. The most common cause is a lack of support for the technology at the smartphone firmware level for a specific carrier. Even a modern phone may be locked to VoWiFi only through certain international carriers.
Another common issue is a network settings conflict. Sometimes resetting network settings to factory defaults can help. This won't delete your personal data (photos, contacts), but it will clear saved Wi-Fi passwords and Bluetooth settings. After the reset, reconnect to Wi-Fi and test the feature. It's also worth checking if your phone is in "Data Saver" or "Power Saver" mode, which could be blocking background VoWiFi.
If the VoWiFi icon is on the screen instead of the VoWiFi icon HD or 4G, this may mean the phone is using VoLTE (Voice over LTE) technology instead of VoWiFi, as the cellular signal is strong enough. Switching between technologies occurs automatically based on the priorities set in the settings. You can force "Wi-Fi only" mode in the cellular settings to test the connection over a wireless network.
In rare cases, the issue may be with your carrier or a specific SIM card profile. If you've upgraded your SIM card (for example, from 3G to 4G/5G), make sure it supports the new generation of services. Older SIM cards, issued many years ago, may not have the necessary applets for authorization in the IMS network.
What should I do if the Wi-Fi icon appears, but calls don't go through?
Try rebooting your router and phone. If that doesn't help, delete the Wi-Fi network profile and reconnect. As a last resort, it will work!
Please contact MegaFon support chat to check the IMS profile on the network side.
Comparing VoWiFi with Alternative Communication Methods
Users often confuse VoWiFi with messaging apps or the MegaFon Telephony service. The fundamental difference lies in the level of integration. VoWiFi is a native phone feature that doesn't require opening a separate app. You dial a number from your phonebook, and the system automatically decides whether to route the call through a cell tower or a Wi-Fi router.
Services like WhatsApp, Viber, and Telegram require both parties to install the app, have an internet connection, and often consume mobile data if Wi-Fi is weak. Furthermore, the quality of calls in messaging apps is heavily dependent on compression algorithms, which can make the voice sound robotic. VoWiFi uses high-quality codecs (AMR-WB), ensuring clear sound.
The MegaFon Telephony app (formerly MegaFon.Calls) is a software implementation that works even on push-button phones or tablets without a SIM card, but requires internet access and authorization in the app. VoWiFi operates at the system level and is transparent to the user, providing an experience as close as possible to a regular cellular connection.
The choice between these technologies depends on your needs. If you need to make calls from a tablet or computer, use an app. If the goal is to ensure a stable connection in a cell phone's "dead zone," then setting up native VoWiFi is the only and most convenient solution.
Do I have to pay for data when making calls over Wi-Fi?
Traffic used directly for voice data during VoWiFi calls is typically not charged by your carrier and does not consume your data plan. However, connecting to Wi-Fi may incur a fee (for home internet). If you use public Wi-Fi, the fee is borne by the hotspot owner.
Is it possible to make calls via Wi-Fi if the SIM card is not active?
For initial registration in the IMS network, the SIM card must be active and recognized by the phone. However, some smartphones allow emergency calls or Wi-Fi calling even without a cellular signal, if a profile has already been saved. However, for full functionality, the SIM card must be inserted into the device.
Does VoWiFi work if the phone is locked?
Yes, if your phone is locked with a screen passcode, an incoming call via Wi-Fi will wake the screen and allow you to answer the call just like a regular call. The key is that your phone is connected to a Wi-Fi network and not in Flight Mode or Do Not Disturb mode (unless the number is an exception).
Does VoWiFi affect internet speed?
Voice traffic has high priority but takes up a small portion of the bandwidth (approximately 64-128 kbps). This will have virtually no impact on page loading speed or video playback unless you have an extremely low connection speed (less than 1 Mbps).
How do I disable a feature if it's interfering?
To disable it, simply go to your phone's settings (the path is provided above) and toggle the "Wi-Fi Calling" switch to "Off." You can also disable the service in your MegaFon account to prevent your phone from attempting to register with the IMS network.