Modern life is unthinkable without a stable connection, but it often happens that in an office, warehouse, or country house, the cellular network is intermittent. It's in these situations that technology comes to the rescue. Voice over WiFi, allowing you to make voice calls and send SMS messages over a wireless network. Smartphone owners Huawei People often wonder how to activate this feature so as not to miss an important conversation even when there is no cell tower signal.
Enabling this option on Chinese brand devices has its own peculiarities, depending on the shell version EMUI or HarmonyOS, as well as the region where the device was purchased. In some cases, the menu may be hidden or renamed, causing confusion for users. Our goal is to analyze all possible activation and troubleshooting scenarios so you can enjoy high-quality service in any environment.
Before we get into the technical details, it's worth noting that the sound quality when using VoWiFi Often outperforms standard GSM calls thanks to its high data transfer rate. However, for successful operation, several basic requirements must be met by your provider and the smartphone itself. Below, we'll detail the requirements and a step-by-step procedure.
Device and carrier requirements
Internet calling technology functionality directly depends on your mobile operator's support for this service. Not all tariff plans and SIM cards automatically have access to this service. Voice over WiFiFirst, you need to make sure your mobile provider offers this service in your region and that it is activated on your number.
From the technical side of the smartphone Huawei must meet certain criteria. These typically include modern models released in the last few years and running current operating system versions. It's important that the device's firmware contains the necessary certificates and software modules to support the IMS protocol.
A stable Wi-Fi connection is also critical. The router must provide sufficient bandwidth and low ping, otherwise calls may be dropped or delayed.
⚠️ Please note: Even if the option is enabled in your phone settings, but the service is not activated on the operator side, calls will still be made through the regular cellular network or will not be made at all.
Check the list of supported operators on the manufacturer's or your provider's official website. Large national operators often support the technology universally, while regional MVNO operators may implement it gradually.
Basic activation via the settings menu
The most common and easiest way to enable this feature is through your smartphone's standard settings menu. The interface may vary slightly depending on the version. EMUI, but the logic remains the same. You'll need to open the Settings app and find the section for wireless networks.
In the menu, go to "Mobile Network." This is where you'll find the main SIM card and cellular network settings. If your model and firmware support this technology, you'll see a corresponding toggle.
Toggle the "Wi-Fi Calling" toggle. Once enabled, your phone may require a reboot or simply confirmation to use data for voice calls. In some cases, the system will prompt you to select a network priority.
☑️ Check before switching on
If the switch is missing or inactive, it may mean the SIM card isn't currently recognized as supporting the service, or the provider hasn't transferred the necessary settings to the device. Try removing and reinserting the SIM card, then restarting the smartphone.
Setting up in the Phone app
In some cases, especially on global firmware versions HuaweiCall management has been moved to a separate system app, "Phone." This app handles dialing, call logging, and additional communication features. To access hidden settings, open the "Dialer" app and tap the three dots in the upper right corner or the menu button.
Select "Settings" from the drop-down list. Scroll down to the section related to internet calls or VoWiFi. A more detailed control menu may be located here.
Select "Prefer Wi-Fi" or "Use Wi-Fi only." The first option means the phone will attempt to use the wireless network for calls, but will switch to cellular if the signal is poor. The second option forces all voice traffic over the internet, which is useful in areas where GSM signal jamming occurs.
| Opening hours | Description of behavior | Recommendation |
|---|---|---|
| Off | Calls only via cellular network | To save Wi-Fi traffic |
| Prefer Wi-Fi | Wireless network priority, fallback to GSM | Optimal mode for home use |
| Wi-Fi only | Cellular network is ignored for calls | For areas without GSM signal |
| Automatically | Selecting a network based on signal quality | Standard system selection |
Keep in mind that if you select "Wi-Fi Only" mode, you may lose the ability to receive calls if the router loses internet access. Be careful when choosing your network switching strategy.
Using the engineering menu and codes
For advanced users who have failed with standard methods, there's the option to access hidden settings through the engineering menu. This is a powerful diagnostic tool, but it requires caution. Changing incorrect settings can lead to unstable modem operation.
Open the dialer app and enter the code ##2846579##This is a universal code for Huawei Opens the ProjectMenu menu. If the code doesn't work, your firmware version may be blocking access to it.
##2846579##In the menu that opens, select "Network Setting," then "Network Mode." Here, you can try forcing the modem to support VoLTE and VoWiFi, for example, LTE Only or a combined mode.
⚠️ Warning: Do not change any values in sections related to antenna calibration or IMEI unless you are a qualified engineer. This may permanently damage your device.
It's also worth checking the "Software upgrade" -> "Version info" section to ensure the baseband version of the modem meets your carrier's requirements. Sometimes updating the baseband resolves the missing switch issue.
Troubleshooting option display issues
A situation where the VoWiFi switch is physically missing from the menu is one of the most common. This is often due to regional firmware restrictions. For example, a phone purchased in China may not have settings for European carriers out of the box.
The first step should always be updating the system. Go to Settings → System and updates → Software updateManufacturers often add support for new operators and features through security patches and major updates.
If updating doesn't help, try resetting your network settings. This will delete saved Wi-Fi passwords and Bluetooth settings, but will reset your network settings to factory defaults, which may unblock hidden features.
How to reset network settings on Huawei
Go to Settings → System & updates → Reset → Reset network settings. Tap the Reset network settings button and confirm. After rebooting, check the Mobile Network menu again.
In some cases, manually changing the region in the phone settings, if this option is available, or installing a SIM card from a different operator that definitely supports the technology to force a service profile update can help.
The Impact of Regional Firmware and Customization
The regional affiliation of the firmware plays a key role in the availability of functions. Global versions (Global) usually have the most complete set of features, while Chinese (CN) or Russian (RU) versions may have limitations dictated by local regulators or operator specifics.
Users often encounter the fact that after reflashing or changing the region through special utilities (for example, Huawei Multi-Tool) The menu changes. However, it's important to remember that changing the region may void the warranty and cause instability in banking apps.
There's also the concept of "branded" firmware, which operators distribute under their logo. These versions may have significantly stripped-down or modified menus. If you're using such a version, it's recommended to consider installing the stock global firmware.
- 🌍 Global version: Full support for international VoWiFi standards.
- 🇨🇳 Chinese version: May require installation of Google services and patches to work with local operators.
- 📱 Branded version: Settings are often locked by the partner operator.
When choosing a solution, always weigh the risks. Reflashing is a last resort, only to be used when all other methods have been exhausted and you are confident in your actions.
Frequently Asked Questions (FAQ)
Does my carrier charge extra for Wi-Fi calls?
Typically, minutes spent on VoWiFi calls are billed according to your primary plan, just like regular minutes. However, data used by your phone is usually not included, as it goes through your home or office internet. Check with your provider for details.
Can I use VoWiFi while roaming?
Yes, this is one of the best ways to save money while roaming. If you're abroad and connected to Wi-Fi, you can call numbers in your home region at your home network's rates, avoiding roaming charges. Make sure this service is enabled in your roaming settings.
Why does the VoWiFi icon appear and disappear?
This could be due to an unstable Wi-Fi signal, switching between access points, or temporary issues on the carrier's end. The phone may also automatically switch to GSM if the internet connection quality drops below a certain threshold.
Does this feature work if there is no mobile network at all?
Yes, the absolute advantage of this technology is that it works even in Flight Only mode (if Wi-Fi is enabled) or in the complete absence of a cell tower signal, providing communication in places where a regular network does not reach.