Modern Xiaomi smartphones offer a wide range of communication options, among which VoWiFi technology stands out. This feature allows for voice calls over a wireless network, which is especially useful in areas with poor cellular signal. However, not all users are comfortable with the automatic switch to this mode, as it can lead to connection interruptions when leaving the router's range.
A situation often arises when a device "clings" to a weak Wi-Fi connection, ignoring a stable 4G or 5G signal, making it impossible to make an urgent call. In such cases, it becomes urgent to forcibly disable this option in the system settings. Understanding this... How to disable Wi-Fi calls on a Xiaomi phone, will help you avoid losing connection at a critical moment and optimize the operation of the communication module.
The MIUI and HyperOS interfaces may differ depending on the firmware version and the region for which the device was released. Despite the visual differences, the logic behind the system settings remains consistent across the brand's entire model range. In this article, we'll detail all the available methods for managing the VoWiFi feature so you can configure your device for your personal preferences.
What is VoWiFi and why should you disable it?
Technology VoWiFi (Voice over Wi-Fi) is a standard for transmitting voice traffic over IP protocols. Essentially, your phone uses the internet to establish a connection to the cellular operator, bypassing traditional base stations. This allows for high-quality sound and stable connections in basements, country houses, or offices with thick walls, where a standard signal doesn't reach.
Despite its obvious advantages, the technology has its own nuances that can be annoying for users. For example, when moving from a router's coverage area to outside, the phone must immediately switch to the cellular network. If this process (handover) is configured incorrectly or is slow, calls can simply be dropped. This is why many prefer to keep the feature disabled, relying on the stability of cell towers.
Additionally, there are situations where telecom operators may charge such calls differently, or the router itself may be unable to prioritize voice traffic, creating delays. In these cases, disabling this option is the only way to restore normal connection quality. It's important to understand that you won't lose your internet access; only the route of your voice calls will change.
- 📡 Network Priority: The phone will always try to use Wi-Fi for calling if the feature is active, even if the cellular signal is excellent.
- 🔋 Power consumption: Continuously searching for and maintaining a voice connection may slightly increase battery consumption in the background.
- 🌍 Roaming: When traveling abroad, using VoWiFi can be more cost-effective than regular roaming, but requires careful checking of operator rates.
⚠️ Attention: Before changing settings, make sure your carrier supports VoWiFi technology in your region. If it doesn't, the menu item may be hidden or not function correctly.
Differences in the implementation of this feature may be observed between global firmware versions and Chinese builds. In some cases, your carrier may block this setting from being displayed via their configuration profile. Therefore, if you don't see the options described below, please contact your mobile carrier's support team to verify compatibility.
Disabling via the standard settings menu
The easiest and safest way to control this feature is in the smartphone's main menu. The path to the switch may vary slightly depending on the operating system version. Android and shells MIUI or HyperOSIn most current models, the algorithm of actions is standardized and takes only a few seconds.
To get started, open the Settings app and navigate to the SIM card and mobile networks section. This is where you'll find all the key communication settings, including network selection, roaming, and call management. Find the option labeled "Wi-Fi Calling."
Once you've navigated to this section, you'll see the main toggle switch, which activates or deactivates the feature. A priority menu may be located nearby, allowing you to tell your phone which network to use first when both are available. To completely disable this feature, simply toggle the main switch to the off position.
☑️ Checking VoWiFi settings
It's worth noting that the settings can be applied individually to each SIM card if your device has two. This means you can leave the feature enabled for one SIM card (for example, your work SIM) and disable it for the other (your personal SIM). This flexibility allows you to optimize costs and call quality for different usage scenarios.
| Parameter | Description of action | Recommendation |
|---|---|---|
| Main switch | Full activation or deactivation of the function | Turn off if the Wi-Fi signal is unstable |
| Network preference | Prioritize between Wi-Fi and Mobile Network | Select "Mobile Network" if you often leave home |
| Indicator | Display the handset icon in the status bar | You can hide it to avoid cluttering the screen. |
In some firmware versions, after disabling this feature, you may need to reboot the device for the changes to take effect. This is necessary so that the communication module can re-register with the operator's network without using VoWiFi protocols. If the handset icon with the Wi-Fi label disappears from the status bar, the setup was successful.
Control via engineering menu and codes
For more advanced users, or in cases where the standard menu fails, hidden settings can be accessed through the engineering menu. This method allows for deeper control of parameters, but requires caution. Changing unknown parameters may result in unstable operation of the radio module.
To access the testing menu, open the Phone app and enter a special code. For Xiaomi devices, the following combination is often used: ##869434## or ##4636##After entering the last digit, the menu should open automatically. If the code doesn't work, your firmware version may be blocking access to these functions.
In the list that opens, select "Phone Information." Scroll down until you find the option related to VoWiFi. There may be several switches here, each controlling different aspects of the technology. Find the one that controls provisioning or activation.
⚠️ Attention: Be extremely careful when changing settings in the engineering menu. Do not touch parameters whose meaning you do not understand, as this may impair the operation of the entire device.
What to do if the code doesn't work?
If entering the code doesn't open the menu, try installing the Activity Launcher app from Google Play. It can be used to find hidden system activities by searching for "VoWiFi" or "ImsService." This is an alternative way to access settings, which often helps on newer versions of Android.
Once you've found the desired switch, change its state to "Disable" or "Off." Unlike standard settings, changes here are applied instantly, but may be reset after a phone reboot if your carrier is imposing their settings remotely. In this case, you may need to use third-party apps to disable system services.
Specific settings for different versions of MIUI and HyperOS
Xiaomi's shells are constantly updated, and the menu structure may change with each major release. Owners of devices based on MIUI 12 or MIUI 13 can find the settings in one place, while users HyperOS They'll find them in a completely different section. This often causes confusion and questions among users.
In new versions of HyperOS, the company strives to unify the interface, so communication settings are often grouped logically. The "Wi-Fi Calling" option can now be found directly on the SIM card by tapping it, rather than in the general list. It can also be quickly activated from the notification shade by adding a corresponding widget there.
If you can't find a setting in its usual location, use the settings search. Click the magnifying glass at the top of the settings screen and search for "Wi-Fi" or "VoWiFi." The system will automatically tell you where the required switch is hidden in your specific software version. This is the fastest way to navigate through a confusing menu.
- 📱 MIUI 12-13: Settings → SIM cards and mobile networks → Wi-Fi calling.
- 🚀 HyperOS: Settings → SIM cards and mobile networks → (Select SIM card) → Wi-Fi calling.
- 🌐 Global versions: Often have a separate item in the advanced call settings.
It's worth keeping in mind that the availability of a menu item also depends on the device's regional configuration. Phones intended for the Chinese or Indian markets may have a different menu structure than global versions (Global ROM). In some cases, changing the region in the phone settings may help, as this can unlock hidden features.
Carrier influence on feature availability
It's important to understand that the ability to use and, consequently, disable VoWiFi depends not only on your phone but also on your carrier. Your carrier must support this technology and send the appropriate configuration profile to your phone. Without this, the menu option will simply not appear or will be inactive.
Major carriers frequently update their profiles, which can cause features to appear or disappear unexpectedly after updating network settings. If you've switched carriers but the settings remain the same, the old profile may still be active. In this case, we recommend resetting your network settings.
To check for support, you can visit the operator's official website or call customer support. The operator's name and the words "Wi-Fi" may also appear on the phone screen when the feature is activated. If this doesn't appear and calls are accepted, it means you're using a regular cellular network, and the feature is either disabled or not working.
⚠️ Attention: Operator app interfaces and service terms are subject to change. Always check your mobile provider's account or official website for up-to-date information on VoWiFi support.
Sometimes, the operator blocks the ability to disable this feature at the network level, considering it a priority to reduce the load on base stations. In such rare cases, the switch on the phone may be blocked or missing. The only solution is to contact technical support and request that the service be disabled on the server side.
Solution: Why can't I turn it off?
Users often encounter a situation where, despite seemingly having configured everything correctly, the feature continues to work. The phone persistently switches to Wi-Fi for calls, ignoring the settings. This could be caused by a software glitch, caching of old settings, or a system process conflict.
The first step in resolving the issue should always be a full device restart. This clears the temporary memory and forces the phone to re-request settings from the carrier. If this doesn't help, try removing the SIM card and reinserting it after turning off the phone. This will refresh the network registration.
In more complex cases, resetting the network settings can help. This will restore all connection settings to factory defaults, including Bluetooth settings and Wi-Fi passwords, but often resolves issues with communication modules not working properly. After resetting, you'll need to re-enter your Wi-Fi password, but the VoWiFi feature should no longer be intrusive.
If all else fails, the issue may be related to a specific firmware version. Check for system updates. Sometimes radio module bugs are fixed in security patches or major shell updates. Installing the latest software version may automatically fix the call control issue.
Connection Quality Comparison: Wi-Fi vs. 4G/5G
When deciding to disable VoWiFi, it's helpful to understand the difference in voice quality. 4th and 5th generation cellular networks use VoLTE technology, which provides high-definition audio (HD Voice). However, this directly depends on tower load and distance.
Wi-Fi calling, in turn, depends on the quality of your internet connection. If your router is old, the connection is congested by neighbors, or the signal is weak, your voice will be intermittent, and you'll experience robotic distortion or delays. With a good home internet connection, the quality can be even better than with a cellular provider, but stability is often lower due to the need to switch between networks.
A critical factor is ping stability: for VoWiFi, latency is less critical than for online gaming, but sharp jumps (jitter) can completely ruin a conversation, whereas a 4G network smooths out such fluctuations better.For users who spend a lot of time in a stationary location (office, home) and have a high-quality internet connection, VoWiFi can be a lifesaver in areas with poor signal strength. However, for active lifestyles, constant movement, and travel, it's more reliable to rely on a trusted cellular network and disable unnecessary features.
Do I need to restart my phone after disabling VoWiFi?
In most cases, changes are applied immediately. However, if you notice the icon remains, or calls are still made over Wi-Fi, a reboot is necessary. This helps the phone reset the old carrier registration profile.
Does disabling VoWiFi affect internet speed?
No, this feature only affects voice calls. Your internet traffic, page loading speed, and app performance will remain unchanged. You'll simply prevent your phone from using the internet for voice calls.
Is it possible to disable VoWiFi for only one SIM card?
Yes, in the "SIM cards and mobile networks" settings, you can configure settings for each card independently. You can choose which SIM card will use Wi-Fi for calls and which will use only the cellular network.
What should I do if the "Wi-Fi Calling" menu item is missing?
Most likely, your carrier doesn't support this feature or hasn't transferred the profile to your device. Try updating your carrier settings in the SIM card menu or contacting support to check compatibility.