Modern smartphones from Huawei They offer a wide range of features that allow you to stay connected even in extremely weak cellular signal conditions. VoWiFi (Voice over WiFi) technology has become a real lifesaver for users living in areas with poor coverage or in buildings with thick walls. Instead of interrupting a conversation when entering a room, the device automatically switches voice traffic to an available wireless network, ensuring crystal-clear sound.
Many device owners don't know that WiFi calls They are often already built into the system but require proper activation. The activation process may vary slightly depending on the operating system version. EMUI or HarmonyOS, as well as your mobile operator's settings. In this article, we'll detail the steps to activate the feature and avoid common setup errors.
It's important to understand that for the technology to work successfully, not only support from a smartphone is required, but also an appropriate data plan. VoWiFi service is usually free for the subscriber, but traffic may be charged according to the terms of your Internet package. Before proceeding with technical settings, make sure that your SIM card supports modern communication standards and is registered with an operator providing IP telephony services.
Checking device and operator compatibility
The first step before activating this feature should be to thoroughly check the technical capabilities of your equipment. Not all models Huawei, released in different years, support the VoWiFi protocol at the software level. Furthermore, even if the phone is technically sound, the firmware may be limited to a specific region or carrier.
Pay attention to the list of supported devices, as flagship series are usually the first to receive this feature. If your device is in the budget segment or is an older model, it's quite likely that it doesn't have a built-in VoIP module. In this case, software-based methods for enabling it may not work.
- 📱 Make sure your model is Huawei or Honor (before the brand split) supports VoLTE and VoWiFi technology.
- 📡 Check if your mobile operator offers Wi-Fi calling in your area.
- 💳 Make sure your SIM card isn't too old and supports 4G/LTE standards.
- 🌐 Activate data roaming if you are abroad, as it is often required for the feature to work.
⚠️ Attention: The settings menu interface may change after the latest system update. If you don't see the options described below, check for software updates in the "System" section.
It's also worth keeping in mind that some telecom operators require preliminary service activation in your personal account or via USSD request. Without this activation, even a perfectly configured phone won't be able to make internet calls. Contact your operator's technical support or use the mobile app to check the service status.
Activating the feature in Android's default settings
In most cases, to enable WiFi calls on smartphones Huawei No third-party software installation is required. All necessary controls are hidden in the standard operating system settings menu. The procedure is fairly simple, but requires careful selection of menu items, as their names may vary.
To begin, unlock your device's screen and go to the main app menu. Find the "Settings" icon, which typically looks like a gear. Within this section, we're interested in the section related to wireless networks and connectivity. This is where the main switches for the communication modules are located.
Next, find the section responsible for your mobile network. Depending on the operating system, it may be called "Mobile Network," "Cellular," or "SIM Manager." Once you've entered this section, you'll see a list of your installed SIM cards. Select the one for which you want to activate the feature.
Inside the menu of the selected SIM card, look for the option Wi-Fi calling or Wi-Fi callsToggle the slider to the active position. The system may ask you to confirm your actions or prompt you to enter an emergency address if required by law in your country.
☑️ Check before switching on
If, after turning on the slider, a corresponding icon (usually a phone handset with Wi-Fi symbols) appears in the status bar next to the network indicator, the feature is active. You can now make and receive calls using your internet connection. Connection quality will depend on the stability of your wireless network.
Configuration via the engineering menu and hidden codes
Sometimes the standard switch is missing from the menu, even though the smartphone technically supports the technology. In such cases, hidden engineering menus, accessed via special USSD codes, come to the rescue. These codes allow access to the modem's deep settings.
To enter the engineering menu, open the Phone application (dialer) and enter the combination ##2846579##This command works on most devices. Huawei With HiSilicon processors. After entering the code, the menu will open automatically, without the need to press the call button.
In the list that opens, select the item ProjectMenu, then go to the section NetworkSetting. Here you are interested in the option VOWIFIIn this submenu you can find the switch VOWIFI switch, which needs to be set to position EnableAfter changing the settings, it is recommended to restart the device.
| Parameter | Description | Recommended value |
|---|---|---|
| VOWIFI switch | Enable the feature globally | Enable |
| VOWIFI in idle | Standby mode operation | Enable |
| IMS Switch | Enabling IMS services | Enable |
| VoLTE Switch | VoLTE related settings | Enable |
What to do if the code doesn't work?
If you enter the code ##2846579## If the menu doesn't open, your firmware may be restricted by your carrier or your device's region doesn't support this method. Try searching for the code for your specific model online or contact a service center.
Be careful when changing settings in the engineering menu. Changing unknown parameters may result in unstable operation of the communication module or complete loss of the network. Record the original values before making any changes so that you can roll back the settings if there are any problems.
Solution: The function is not activated
A situation where all the settings are correct, but WiFi calls Internet connections not working is quite common. There can be many reasons for this, ranging from a simple software conflict to a service block on the carrier's end. The first step is to check if the internet connection is working on the device itself.
A common issue is a conflict between network modes. If the phone is struggling to maintain a weak 3G signal, it may ignore the option to switch to Wi-Fi for calls. Force the mode in the mobile network settings. 4G/LTE or 5G, excluding 2G and 3G.
- 🔄 Restart your smartphone after making all the settings.
- ✈️ Toggle Flight Mode on and off to re-register with the network.
- 🗑️ Delete the Wi-Fi profile and reconnect using the password.
- 📲 Update the Phone and Contacts app via AppGallery or Google Play.
⚠️ Attention: Some routers have security settings (such as client isolation or a strict firewall) that may block ports required for the SIP protocol. Try connecting to a different access point to test.
It's also worth checking if you have a third-party calling app installed that is hijacking your microphone. Standard dialing Huawei should be set as the default app for making calls. Check this in "Apps" -> "Default Apps."
Using the Huawei HiLink app and routers
Ecosystem owners Huawei can take advantage of additional features through the app HiLink (or AI Life). Although it's primarily designed for managing routers and smart homes, VoWiFi stability directly depends on the signal quality of your router.
The app allows you to prioritize traffic for voice calls. This is especially important if you have many bandwidth-consuming devices connected to the network (TVs, computers). The QoS (Quality of Service) feature allows you to allocate resources for telephony.
To set priorities, log in to the router interface via the app. Find the section related to device management or priorities. Select your smartphone from the list of connected devices and set the mode to "Priority" or "Games/Video," which often improves the stability of voice calls.
Also, make sure IPv6 is enabled on your router if your provider supports it. Modern VoWiFi networks often operate more reliably over IPv6, as it avoids NAT translation issues common with IPv4.
Features of working while roaming abroad
Usage WiFi calls Calling abroad is a great way to save on roaming charges. This technology allows you to make calls to numbers in your home region as if you were at home. In this case, you'll be charged according to your home plan, not roaming rates.
However, there are some important nuances. First, "Data Roaming" must be enabled in your phone's settings, even if you're calling over Wi-Fi. This is necessary for proper device identification on the foreign partner's network. Second, the number you're calling from must be correctly identified.
When traveling abroad, it's recommended to put your phone in airplane mode and then enable Wi-Fi only. This will prevent accidental connections to local towers and charges for incoming or outgoing cellular calls. Once Wi-Fi is enabled, VoWiFi should work.
⚠️ Attention: Calls to numbers in your host country via VoWiFi may incur international charges. Check with your provider before traveling.
It's also worth considering that some countries block VoIP traffic at the ISP level. If you're connected to public Wi-Fi at a hotel or cafe abroad and your calls aren't going through, the network may be blocking ports for voice traffic. In this case, using a mobile VPN can help, although it may reduce connection quality.
Frequently Asked Questions (FAQ)
Does WiFi calling affect mobile data usage?
No, when using VoWiFi technology, traffic is transmitted over a Wi-Fi internet connection. It doesn't count against your mobile data plan provided by your mobile operator. However, please be aware of the limits of your home or public Wi-Fi network.
Why does my phone's internet connection disappear while I'm talking on WiFi?
This may occur if your smartphone or Wi-Fi network doesn't support simultaneous voice and data transfer. Make sure IPv6 support is enabled on your router and the "Data transfer during calls" option is enabled in your phone's settings.
Can I use VoWiFi if my SIM card is blocked?
Yes, emergency calls can work, but for regular VoWiFi calls, the SIM card must be active and registered with the operator's network, even if you're in an area without cellular coverage. Without network registration, IMS services won't work.
How do I know if a call was made via WiFi?
Typically, a phone icon with a Wi-Fi symbol or the words "Wi-Fi Call" appear at the top of the screen next to the signal strength indicator. A pop-up notification about the connection type may also appear at the start of a call.
Do I need to keep the screen on during a call?
No, VoWiFi works in the background. You can lock your screen or switch to other apps. The main thing is that the Wi-Fi connection remains stable and your phone doesn't go into power-saving mode, which disables the network.
Setting up WiFi calls on devices Huawei Opens up new horizons for mobile communications, eliminating the vagaries of cellular coverage. By following these instructions, you can ensure reliable connection in any conditions. Remember that technology evolves and interfaces are subject to change, so it's always a good idea to check the latest manuals on the manufacturer's official website.