Modern mobile communications face a constant challenge: signal quality in buildings often leaves much to be desired. Thick walls, basements, and distance from base stations create "dead zones" where a regular GSM signal simply cannot penetrate. In such situations, technology comes to the rescue. VoWiFi, which allows you to make calls over an internet connection. Tele2 is actively implementing this feature, giving subscribers the ability to stay connected even in areas with only Wi-Fi coverage.
Activating this option doesn't require any complicated technical steps or a visit to a mobile phone store. In most cases, the process takes a couple of minutes and is performed directly in the smartphone settings. However, despite its simplicity, users often encounter nuances that prevent the service from working properly. Understanding the operating principles Voice over Wi-Fi will help you avoid typical mistakes during setup.
In this article, we will take a detailed look at how to connect Wi-Fi calls on devices with operating systems Android And iOSWe'll cover not only standard activation scenarios but also solutions for common issues where the feature appears to be enabled, but calls aren't connecting. The readiness of your equipment and tariff plan are key factors for success.
What is VoWiFi and how does it work with Tele2?
Technology VoWiFi Voice over Wi-Fi (Voice over Wi-Fi) is a method of transmitting voice calls over IP. Unlike traditional messaging apps, which use their own servers to route audio, Wi-Fi calls are integrated directly into your phone's default dialer. To the other person, your call will appear as a regular incoming mobile call, not an internet call.
Tele2 uses this feature based on IMS (IP Multimedia Subsystem). This means voice traffic is transmitted over a secure channel, ensuring high-quality calls (HD Voice). The main advantage is that the phone automatically switches between Wi-Fi and cell towers without interrupting the connection. If you leave the router's coverage area, the conversation will seamlessly switch to LTE/3G, if coverage allows.
It's important to understand that this technology requires support from three components: your carrier, your data plan, and your smartphone. Tele2 offers the service free of charge, but it must be active on the network. Furthermore, Wi-Fi roaming operates under special rules, allowing you to save on calls abroad while remaining within the wireless network coverage area.
⚠️ Please note: Voice call quality directly depends on the speed and stability of your internet connection. If your Wi-Fi network is overloaded or has a high ping, audio quality may deteriorate, causing delays or interruptions.
Requirements for the subscriber's device and tariff
Before you begin setup, you need to make sure your hardware meets the minimum technical requirements. Not all smartphones, even modern ones, have hardware or software support for this feature. VoWiFi In specific regions. Tele2 regularly updates the list of supported models, but the basic requirements remain unchanged.
First and foremost, your tariff plan should support modern communications services. Currently, almost all current archived and new Tele2 tariffs support this option by default. However, if you're using a very old tariff or a limited corporate plan, it may need to be replaced or updated.
It's also critical that your SIM card be replaced with a USIM (4G-compatible) card. Older cards, which were only used for 2G/3G, may not support the encryption protocols required for voice over IP networks. You can check your card type in your account or simply by looking at the network icon in the status bar—it should display the symbol. 4G or LTE.
Below is a table of compatibility of popular smartphone brands with the Tele2 service:
| Smartphone brand | VoWiFi support | Required OS version | Note |
|---|---|---|---|
| Apple iPhone | Full | iOS 13 and above | Operator profile update required |
| Samsung | Full | Android 9.0+ | It may be called "Wi-Fi Calling" |
| Xiaomi / Redmi | Partial | Android 10+ | Depends on the firmware region |
| Huawei / Honor | Full | Android 9.0+ | Google services are required (not always) |
Activation of the service on the operator's side
Even if your phone is perfectly configured, the service may be disabled by the network. Tele2, like many other operators, sometimes requires manual activation of the service or confirmation of your desire to use the technology. This is done for security and traffic control purposes.
The fastest way to check the service status is using a USSD command or your personal account. In the "My Tele2" mobile app, go to the service management section. There may be a separate switch for "Wi-Fi Calling" or "VoWiFi." If there is no such switch, the service is likely already active by default for your number.
An alternative method is to send a short request. While a single universal command may not exist for all regions, resetting network settings or re-registering with the network often helps. If the service status is unclear in the app, it's worth contacting support chat with the request "Activate VoWiFi."
Keep in mind that changes to pricing or service activation can take up to 24 hours, although in practice they usually take just a few minutes. If calls still don't work over Wi-Fi after activating the app, try restarting your device to re-register with the carrier's network with the updated settings.
Setting up Wi-Fi calling on Android
Operating system interface Android The details may vary significantly depending on the manufacturer (MIUI, OneUI, ColorOS, etc.). However, the logic for enabling the feature remains similar. First, find the section responsible for mobile network.
Go to Settings your smartphone. Find the item Connections or Mobile networkInside this menu you should look for an option called Wi-Fi calling, Wi-Fi Calling or VoWiFi. Move the slider to the "On" position. On some Samsung models, for example, the path may look like this: Settings → Connections → Wi-Fi Calling.
Once the feature is enabled, a corresponding icon should appear in the status bar (the top line of the screen). Typically, it's an image of a telephone handset with Wi-Fi symbols next to it, or the text VoWiFiIf the icon appears but is grayed out, it means the phone is ready to use but is not currently connected to a suitable Wi-Fi network or is not registered with the operator's network.
☑️ Check Android settings
Xiaomi and Huawei smartphone owners may need to perform additional steps. In some cases, you may need to manually enter the access point's APN or update the IMS configuration. If the standard activation method doesn't work, try entering the code in the dialer menu. ##869434## (may not work on all models) to run the VoWiFi compatibility check wizard.
⚠️ Note: This feature may not work reliably on some custom Android firmware versions. If you're using an unofficial version of the software, the manufacturer may block access to your carrier's IMS services.
Enabling the feature on iPhone (iOS)
For product owners Apple The setup process is as simple as possible thanks to the manufacturer's tight control over the software. To use Wi-Fi calling on Tele2, your iPhone must be updated to the latest version of iOS (iOS 13 or later is recommended).
Go to the menu Settings, then select the item TelephoneIn the list of options, find the line Wi-Fi callingActivate the switch. The system may ask you to confirm your actions, warning you about sharing your location data with the emergency services operator (E911). You must agree to the terms for this feature to work.
Also make sure that in the section Settings → Cellular item included Enable LTE and the mode is selected Voice and dataThis will ensure proper switching between networks. After enabling, a note may appear next to the operator's name in the Control Center or status bar. Wi-Fi.
What should I do if the Wi-Fi Calling option is missing on my iPhone?
If you don't see this option in your settings, your plan may not support the service, or your carrier may not have sent the configuration to your device yet. Try removing the SIM card, wiping the contacts, and reinserting it. Then connect to Wi-Fi and wait 10-15 minutes. Also, check for iOS updates.
It's important to note that on iPhone, this feature can run in the background even when the screen is off, ensuring uninterrupted communication. If you're traveling abroad, enabling this option allows you to receive incoming calls for free (as if you were in your home region), provided you're connected to Wi-Fi.
Troubleshooting and Frequently Asked Questions
Even with proper configuration, situations may arise where the technology doesn't work as expected. Most often, problems are related to router settings or software conflicts. If the icon VoWiFi If the light is on, but calls are still disconnected, try rebooting your router. Sometimes disabling and re-enabling Airplane Mode on your phone helps.
Another common cause is the use of VPN services. Voice encryption protocols can conflict with VPN tunnels, preventing the operator from authorizing the device on the IMS network. It's recommended to temporarily disable the VPN for important calls.
Below are answers to the most frequently asked questions from Tele2 users regarding calls via the wireless network.
Are minutes from the package taken for calls over Wi-Fi?
No, minutes are used from your main plan according to your plan, just like for regular calls. If you have unlimited minutes, they are also valid. The main thing is that the call is initiated through the standard phone interface.
Do I need a special router to use VoWiFi?
A dedicated router isn't necessary. Any device that provides stable internet access will suffice. However, if the router is very old and doesn't support modern NAT protocols or has strict firewall settings, connection issues may occur.
Does VoWiFi work when roaming abroad?
Yes, this is one of the most useful features for travelers. While abroad and connected to hotel Wi-Fi, you can call Russian numbers at rates in your home region, just as if you were in Russia. Incoming calls will also be free.
Why does the VoWiFi icon disappear during a call?
This can happen if the Wi-Fi signal has become too weak, and the phone has tried to switch to a mobile network, but there's no 4G coverage in that area. Or, the router has lost its internet connection. Check the stability of your home network.
⚠️ Please note: Service terms, pricing, and technical support are subject to change. The operator reserves the right to change service parameters. Always check the latest terms in the official Tele2 app before making important calls.