Modern life dictates its own rules, and high-quality voice communication is becoming critical in any situation. Users often face the problem of poor cellular reception in apartments, offices, or country houses, when the signal level drops to a minimum. This is where technology comes to the rescue. VoWiFi, which allows you to make and receive calls using only a wireless Internet connection.
Tele2, like many other major market players, is actively implementing and supporting this feature, providing its subscribers with stable connectivity in areas where regular cellular networks don't reach them. However, the activation and setup process Wi-Fi Calling The connection details may vary depending on your smartphone model and operating system version. In this article, we'll cover all the connection details, possible errors, and answer the most frequently asked questions.
Before proceeding with technical settings, you need to ensure that your tariff plan and service region support this service. Tele2 offers this service free of charge, but the basic terms may vary depending on the specific terms of your contract. The VoWiFi service only works when the Tele2 SIM card is activated, even if the call itself is made over the Internet.
What is VoWiFi technology and how does it work?
VoWiFi stands for Voice over Wi-Fi, literally "voice over Wi-Fi." It's a technology that enables voice calls over IP network protocols, just like popular messaging apps, but integrated into your phone book and standard dialer interface. You don't need to open a separate app; simply dial the number.
The main advantage of this technology is the ability of the Wi-Fi signal to penetrate rooms much better than a cell tower's signal. Thick walls, basements, and distance from base stations are no longer a problem. The router's signal ensures a stable connection, and Tele2 takes care of routing your voice to the public telephone network.
⚠️ Please note: Connection quality directly depends on the speed and stability of your internet connection. If your internet connection is slow, your voice may be interrupted or distorted.
It's important to understand that Wi-Fi calls are not the same as calls made through internet apps (Viber, WhatsApp). They are full-fledged cellular calls, charged according to your primary plan. If you have unlimited minutes to all networks, Wi-Fi calls will also be free as part of your plan.
Checking device and tariff compatibility
Before you begin setup, you need to ensure your equipment is technically ready to work with modern communication standards. Not all older smartphone models support the IMS protocol, which is necessary for voice calls over IP networks. It's also important to ensure your phone's software is updated to the latest version.
The list of supported devices is constantly expanding, but the basic requirements remain the same. These typically include smartphones released no earlier than 2016-2017, running Android 6.0 or higher or iOS 12 or higher. Tele2 regularly updates the list of certified models on its official website.
Additionally, the SIM card itself must be registered on the 4G (LTE) network. If you're using a very old SIM card, one that worked back in the 2G/3G era, you'll likely need to have it replaced at a mobile phone store. This is a free procedure that only takes a few minutes, but it's critical to accessing modern services.
- 📱 The smartphone must support VoLTE/VoWiFi technology (often depends on the regional firmware).
- 📶 You must have an active 4G/LTE service in your tariff plan.
- 🔄 The phone's operating system must be updated to the latest available version.
- 📍 Your region must be within the service coverage area (large cities and suburbs).
You can also check compatibility through your subscriber account or the "My Tele2" app. This often displays the status of available services for your number. If the "Wi-Fi Calling" option is unavailable, it may not be supported by your plan.
Activation of the service on the operator's side
In most cases, VoWiFi technology is enabled by default for all Tele2 subscribers using current plans. However, depending on the phone number's activation date or the specifics of the plan, the service may need to be activated manually. This can be done in several convenient ways, without visiting a sales office.
The fastest way is to use a USSD command. By entering a short code on your phone's keypad, you send a request to the operator's server. The response will come as an SMS message or a pop-up window. This is a universal method that works even on push-button phones, although they are unlikely to work with the Wi-Fi function itself.
*155*0056#An alternative option is to use the "My Tele2" mobile app. In the services or plan settings section, you can often find a toggle for additional communication options. The app interface may vary, so look for the "Services," "Additional," or "Communication Settings" sections.
What to do if the command doesn't work?
If the USSD code returns an error or a message about service unavailability, this may mean your tariff plan is outdated and does not support modern features. In this case, we recommend upgrading to a current tariff or contacting technical support for further details.
You can also activate your account on the operator's website. Log in using your phone number, go to your profile, and find the service management section. There you'll see a list of available options. If the switch is in the "Off" position, simply turn it on.
⚠️ Please note: After activating the service with your carrier, changes may not take effect immediately. It is recommended to restart your phone 5-10 minutes after sending the command.
Setting up WiFi calling on Android
Android devices have many different skins (MIUI, OneUI, ColorOS, etc.), so menu item names may vary. However, the setup logic remains the same across all system versions. You'll need to find the section responsible for mobile network and SIM cards.
First, make sure Wi-Fi is enabled on your phone and connected to a working network. Then, go to the device's main settings. Find the "Connections," "Network & Internet," or "SIM cards & mobile networks" section. This is where the key switches are located.
In the SIM card menu, select your Tele2 SIM card. If your phone supports two SIM cards, you'll need to check the settings for each separately. Find "Wi-Fi Calling" and toggle the switch to on.
☑️ Check Android settings
Once the feature is enabled, a corresponding icon should appear at the top of the screen where the signal strength is displayed. It may look like a telephone handset with a Wi-Fi symbol or simply read "Wi-Fi Call." This means the phone is ready to make internet calls.
In some cases, especially on Xiaomi or Huawei smartphones, an additional step may be required. You'll need to select a network priority. Options include "Prefer Wi-Fi," "Prefer Mobile Network," or "Don't Set." For maximum data savings and the best connection indoors, it's best to prioritize Wi-Fi.
- 🔍 Go to
Settings → Connections → Mobile network. - 📞 Select your Tele2 SIM card from the list.
- 📡 Activate the slider
Wi-Fi calling. - 🎛️ Select the operating mode (automatic or Wi-Fi priority).
If you can't find this setting, try searching through your phone's settings. Type "Wi-Fi" or "VoWiFi" in the search bar, and the system will automatically tell you where to find the switch. This is especially useful in newer versions of Android, where menus are frequently reorganized.
Instructions for iPhone (iOS) owners
Apple smartphone owners are lucky to have a unified ecosystem: setup is virtually identical on all iPhone models, starting with the 5S and newer. The main requirement is the latest version of iOS. Tele2 officially supports this feature on iOS devices, so compatibility issues are generally uncommon.
To activate, open the "Settings" app and go to "Cellular." If you have an iPhone with two SIM cards (one physical and one eSIM, or two eSIMs), select the Tele2 number from the list. This is important, as the settings are applied individually for each number.
Find "Wi-Fi Calling" and enable it. You may be warned that using this feature may send your address to your carrier for emergency services. This is a standard security requirement, so you must agree to it by tapping "Continue."
After turning on, the message "Tele2 Wi-Fi" may appear in the status bar next to the operator's name. This indicates that the phone has successfully registered with the operator's network via the Internet Protocol. All incoming and outgoing calls will now be made via Wi-Fi if the cellular signal is weak.
It's worth noting that the iPhone has an additional feature called "Add Other Devices." This allows you to receive calls on your iPad, Mac, or iPod touch when your iPhone is nearby or even on a different network. This is convenient for those within the Apple ecosystem, but it's not required for the basic functionality of the feature.
⚠️ Please note: When switching between Wi-Fi and a mobile network during a call (for example, if you leave the house), the connection may be briefly interrupted or switch to regular cellular mode if 4G coverage is available.
Tariffs and roaming: important nuances
One of the most frequently asked questions concerns the cost of these calls. Many users mistakenly believe that calling over Wi-Fi consumes data traffic. This is not true. The minutes are deducted from your main voice plan just like a regular call. Data traffic is not charged.
Roaming requires special attention. If you're abroad but connected to Wi-Fi, VoWiFi technology allows you to stay connected. Incoming calls to a Russian number are often free (or charged as incoming calls in your home region, depending on roaming conditions), while outgoing calls are charged at the roaming rates of your host country.
The table below will help you understand pricing for different usage scenarios:
| Scenario | Consumption of minutes | Internet traffic consumption | Payment |
|---|---|---|---|
| Call within Russia (home) | From the minutes package | Not consumed | According to the tariff |
| Incoming call while roaming (via Wi-Fi) | Not consumed | Not consumed | Free (usually) |
| Outgoing roaming (via Wi-Fi) | Not consumed | Not consumed | At the roaming rate |
| Calling emergency services | No tariff | Not consumed | For free |
Using Wi-Fi Calling abroad is a great way to save on incoming calls while remaining available to colleagues and family.
Troubleshooting and troubleshooting
Despite the simplicity of setup, users may encounter difficulties. The most common issue is the lack of a menu option to enable the feature. This almost always means the phone isn't certified by the operator to work with this feature on the Tele2 network, or the phone's firmware doesn't support VoWiFi in your region.
Another common error is the inability to make a call, even though the icon is lit. Check that your router or antivirus software isn't blocking the ports needed for voice transmission. Also, make sure you have sufficient funds in your balance or a valid call plan, as even test calls require an active SIM card.
If the icon appears and disappears, try rebooting your router. Unstable ping or packet loss can cause the connection to the carrier's servers to be interrupted. In such cases, the phone automatically switches to the cellular network if available.
- 🚫 Restart your smartphone and router.
- 📡 Check if Airplane mode is enabled.
- 📲 Make sure the SIM card is not damaged and fits tightly in the slot.
- ⚙️ Reset your network settings to factory defaults (be careful, this will delete saved Wi-Fi passwords).
In rare cases, the problem may be on the operator's end—technical work is underway. If all else fails, it's worth contacting Tele2 support. Operators can check the service status on their equipment and tell you whether they can see your device on the network.
Why isn't VoWiFi working on my dual SIM phone?
On some Android models, when actively using Wi-Fi on one SIM card, the second may temporarily lose network coverage or switch to 2G/3G mode. This is a technical limitation of the chipsets. Try disconnecting the second SIM card during an important call.
Is it possible to make calls via Wi-Fi if there is no cellular network coverage at all?
Yes, this is the primary use case for this technology. The phone may not even see the operator's tower, but if it has Wi-Fi and is authorized to the Tele2 network, the call will go through successfully.
Will Caller ID work when making calls over WiFi?
Yes, caller ID works as standard. You'll see the contact's name from your phone book, and the caller will see your number. It's no different from regular calling.
Does Wi-Fi Calling affect battery life?
The impact is minimal. Searching for a Wi-Fi network and maintaining a connection requires power, but often less than constantly searching for a cellular signal in a poor coverage area. Overall, the difference in battery life is unnoticeable.