Many smartphone users Huawei And Honor Face a situation where the cellular signal indoors is extremely weak, but there is a stable wireless internet connection. In such cases, technology comes to the rescue. VoWiFi (Voice over Wi-Fi), which allows voice calls to be made using an internet connection instead of the operator's radio channel. It's not just a replacement for a connection, but a full-fledged integration, where calls are made through a standard dialing interface.
However, despite the presence of hardware support in most modern models, activating this function often causes difficulties. On Huawei devices, activating VoWiFi may require not only turning on the switch in the settings, but also editing configuration files or changing the region. In this article, we'll cover all possible activation methods, how to work with different operators, and how to resolve common errors.
Before attempting any complex steps, it's worth making sure your phone model is technically capable of supporting this protocol. Not all budget devices or older firmware versions have unlocked functionality for IP telephony at the system level. If basic methods fail, more advanced solutions are provided below.
Checking operator compatibility and requirements
The first step is verifying the conditions without which the technology won't work. Even if the required option is available in the menu, your carrier may block the service at the network or tariff plan level. Make sure your SIM card is registered with the 4G/LTE network, as VoWiFi often requires pre-registration with the carrier's IMS core.
The second important aspect is the smartphone model. Global firmware versions may differ from Chinese or Russian builds. In some regions, the feature is enabled by default, while in others, it is hidden by the manufacturer at the request of local carriers. Check for software updates, as protocol support is often added with security patches.
- 📱 Your smartphone must support the standard VoLTE, since VoWiFi is its logical continuation.
- 📡 Your mobile operator must provide the Voice over Wi-Fi service and activate it on your number.
- 🌐 Data roaming must be enabled in your mobile network settings, even if you are at home.
⚠️ Attention: The terms of service may be changed unilaterally by the operator. We recommend checking the current list of supported plans and device models in your service provider's personal account before setting up.
Basic activation via the settings menu
The easiest and safest way to enable this feature is to check the standard system menu. In newer versions of the shell EMUI And HarmonyOS The setup process has become more straightforward. You won't need root privileges or third-party apps if your carrier is fully compatible with your device.
Go to Settings and find the option related to mobile network. The interface may differ slightly depending on your Android version, but the logic is the same. If you don't see the toggle right away, try turning Airplane Mode on and off to allow your phone to re-register with the network and receive the latest configuration settings.
Next you need to follow the path Settings → Mobile Network → Mobile Calling over Wi-FiOn some models, this option may be called "Wi-Fi Calling" or located within the "More" menu. After turning the slider on, the system may request an emergency services address. Please enter your current region; this is critical for 112 or 911 services.
☑️ Basic setup checklist
If the handset icon with the Wi-Fi symbol doesn't appear in the status bar after turning it on, try rebooting the device. Sometimes the system needs time to re-authorize with the operator's IMS service. The absence of the icon doesn't always indicate an error; sometimes it's hidden by the theme or interface settings.
Using the engineering menu and codes
When the standard path is blocked, hidden diagnostic menus come to the rescue. On smartphones Huawei Access to them is often limited, but there are a number of universal codes that may work. Enter the combination into your dialer. ##2846579## to enter ProjectMenu.
In the menu that opens, select a section Network Setting, then find the subsection related to VoLTE or VoWiFi. You can force-enable protocol support here. However, be careful: changing unknown parameters may cause instability of the communication module. Remember the original values before making changes.
Path to ProjectMenu:
1. ProjectMenu
2. Network Setting
3. Network Mode Select (select LTE preferred)
4. VoLTE Switch (Enable)
Another method is to use code ##4636##, which opens the standard Android testing menu. Select "About phone" and look for the "Turn off VoLTE provisioned" toggle (you need to turn it off to enable VoLTE/VoWiFi). If the menu is empty or there are no options, access is blocked by the manufacturer.
What to do if the codes don't work?
If entering the codes doesn't bring up the menu, your EMUI version may be blocking access to the engineering features. In this case, change the phone's region in the settings (see the next section) or use ADB commands to force activation.
Changing the region and modifying the firmware
One of the most effective "tricks" for Huawei owners is changing the device's region. The logic is simple: in some countries (for example, Russia, Kazakhstan, Belarus), carriers have implemented VoWiFi en masse, and Huawei activates this feature by default for those regions. If your phone was purchased in a region where the service is not popular, the feature may be hidden.
To change the region, go to Settings → System and updates → Language and region → RegionSelect a country where the technology is developed (for example, Russia or Kazakhstan). After changing the region, your phone may prompt you to reboot. Immediately after turning it on, check your mobile network settings—the option may magically appear.
| Region | The likelihood of VoWiFi | Impact on language | Impact on services |
|---|---|---|---|
| Russia / Kazakhstan | High | Russian language | Local services |
| Germany | Average | German / English | European services |
| China | Low (own standards) | Chinese / English | Chinese services |
| UAE | Low (blocking) | Arabic / English | VoIP limitations |
It's worth noting that changing the region isn't a reflash. It's a software configuration change that doesn't erase user data. However, if you use specific local apps that rely on geolocation, their functionality may change. You can revert to your previous region at any time.
Configuration via ADB and hidden commands
For advanced users who are not afraid of the command line, there is an activation method via ADB (Android Debug Bridge). This method allows you to change system flags that are hidden from the average user. You'll need a computer, a USB cable, and USB debugging enabled on your phone.
First, you need to enable debug mode. Go to Settings → About phone Tap the build number seven times quickly. A message will appear saying "You are now a developer." Then, in the "System & Updates" menu, enable "USB Debugging." Connect your phone to your PC and launch the console.
Enter the following command to check the current status:
adb shell settings get global ims_wifi_enabledIf the system responds 0, then the feature is disabled. To enable it, enter the command:
adb shell settings put global ims_wifi_enabled 1⚠️ Attention: ADB commands provide deep system access. Incorrectly changing global settings can result in connection loss or the need to reset your phone. Use this method only if you understand what you're doing.
After executing the command, be sure to reboot the device. This method often works on models where the carrier has added support, but the manufacturer "forgot" to add a switch in the interface for a specific region.
Solving common problems
Even after successful activation, some issues may arise. For example, the phone may not switch to Wi-Fi during a call if the cellular signal is stable enough. This is normal behavior: priority is always given to the cellular network to ensure uninterrupted connection when leaving the router's range.
Another common issue is connection drops when moving between access points. If you're moving around a large office or shopping center, your phone may lose connection to one router and have a delay connecting to another. Try disabling "Adaptive Connection" or "Smart Network Selection" in your Wi-Fi settings to make your phone more reliably maintain the current connection.
- 📉 Problem: The Wi-Fi Call icon is present, but calls do not go through. Solution: Check your balance and service availability with your operator.
- 🔄 Problem: The phone constantly switches between 4G and Wi-Fi Call. Solution: In the mobile network settings, select the "4G only" or "LTE preferred" mode.
- 🔒 Problem: The function does not work in roaming. Solution: Make sure that Data Roaming settings are checked and that Prefer Wi-Fi is selected in the VoWiFi menu.
It's also worth considering that some corporate Wi-Fi networks block ports needed for voice traffic. If calls don't work at the office but do at home, the problem is most likely with the organization's firewall settings, not your phone.
FAQ: Frequently Asked Questions
Are minutes charged for Wi-Fi calls?
Technically, the call goes over the internet, but operators charge it as a standard minute from your plan. There's usually no separate charge for using VoWiFi technology, but data may be consumed if you're not connected to your home Wi-Fi and instead use a mobile hotspot.
Does VoWiFi work if there is no mobile network coverage at all (0 bars)?
Yes, this is the primary purpose of the technology. If the SIM card is registered with the network (even if the signal is weak) and Wi-Fi Call is enabled, the phone will use the internet connection for voice calls. However, initial registration with the operator's network is still required.
Why is there no "Wi-Fi Call" icon on Huawei, even though my friend does?
This depends on a combination of three factors: phone model, firmware version, and carrier SIM card. If your friend has a different carrier or phone settings region, the feature may be enabled by default for them, but hidden for you.
Is it possible to make calls via Wi-Fi without an inserted SIM card?
No, the native VoWiFi feature requires an active SIM card for authentication on the carrier's network. Without a SIM card, you can only use third-party messaging apps (WhatsApp, Telegram, Viber), but not the native dialer.