Modern Xiaomi smartphones offer many features to improve communication quality, and one of them is Wi-Fi calls. This technology allows you to make calls in areas with poor cellular signal using a wireless Internet connection. However, not all users need this option, as it can drain the battery or create confusion in the charging minutes.
Device owners often face a situation where the Wi-Fi icon appears on the screen unexpectedly, or the connection quality becomes unstable due to frequent switching between networks. Disabling the function can be the optimal solution for stable operation in areas of confident 4G reception. In this article, we will discuss in detail all ways to deactivate this service.
It should be understood that the management of this option depends not only on the firmware MIUI It's either HyperOS or your mobile operator's settings, and sometimes the standard methods of turning off the phone menu are ineffective, and then you need to tamper with the settings. SIM-We'll look at all the nuances so you can have full control of your device.
What are Wi-Fi calls and why turn them off
VoWiFi (Voice over Wi-Fi) technology is the transmission of voice traffic over the Internet protocol. This means that your voice is converted into digital data packets and transmitted through a router, bypassing standard cell towers. To users, this often looks like a regular bell, but with clearer sound in basements or buildings with thick walls.
Despite the obvious advantages, there are good reasons to disable Wi-Fi calls. First of all, this is about saving battery power, as constantly finding and holding a wireless connection in the background consumes energy.
⚠️ Warning: Disabling the feature can cause communication loss in places where there is no cellular signal at all (for example, in underground parking lots or remote suburban areas), even if you have an Internet connection.
Also worth mentioning is the problem of “false calls,” which some users have noticed is that the phone is trying to make a call over Wi-Fi even when the cellular network is available, sometimes resulting in delays or a connection break when you start a conversation, and understanding these nuances will help you make an informed decision about using the technology.
Disabling the function through the standard settings menu
The easiest and most obvious way to remove Wi-Fi calls on Xiaomi is to use the built-in settings menu. The MIUI shell interface may vary slightly depending on the version, but the logic of action remains the same. You will need access to basic system settings and a little time.
First, you need to open the Settings app and find the section responsible for the work. SIM-It's usually called that — «SIM-maps and mobile networks. This is where all the key switches related to voice and data are concentrated.
☑️ Pre-switch check
Inside your menu SIM-If you're looking for a card, you'll find a item that might be called Wi-Fi Calling, Wi-Fi Calling, or Wi-Fi Calling. If that switch is active, just tap it to turn gray. This action will instantly stop the phone from using the wireless network for voice calls.
In some cases, especially on global firmware, this item may be hidden if the operator does not support the function or if the operator does not support the function. SIM-If you don't find the switch, try restarting the device or re-inserting and re-inserting it. SIM-map and then check the settings again.
Use of the engineering menu and operator codes
If the standard path didn't work, you can try more advanced methods. One of them is using the same method. USSD-These codes allow you to manage services on the network side without having to ignore the phone settings.
Codes may vary for each operator, so it is better to check them on the official website or in the application of your provider. Often a universal code is used to disable all additional services or specifically VoWiFi. Entering a command in the call sends a request to the operator's server.
Another option is to log into the Android engineering menu, but on modern versions of HyperOS, access is often closed or restricted. Attempting to log in via code ##4636## can open the testing menu, where you can sometimes find hidden settings of the radio module in the "Phone Information" section.
The risks of the engineering menu
After input USSD-code you'll get SMS-Notification of successful service shutdown, then it is recommended to restart the smartphone so that it re-registers with an updated service profile, and this ensures that you will no longer be able to make Internet calls.
Settings through the application of the operator
In the digital age, most major carriers provide users with their own apps to manage their rates and services, and this is often the most convenient way to turn off Wi-Fi calls, as changes apply instantly and sync to all your devices.
Go to your carrier’s app (e.g., “My Beeline”, “MTS”, “My Tele2”, etc.) and log in. You need to find the “Services” or “Connection settings” section, which often includes the “Additional Options” or “Calls” category, where the desired switch is hidden.
- 📱 Open the operator app and log in to your acca 🔍 Go to the “Services” or “Tariff” section». 📞 Find a block associated with voice or VoWiFi. ❌ Press the "Disable" button or switch to the "Off" position, and the advantage of this method is that the setting is saved on the network side, even if you reset the phone to the factory settings or insert it. SIM-card to another phone, Wi-Fi calls don’t activate until you turn them back on via the app. 💡If the operator's application doesn't have an explicit switch for Wi-Fi Calling, try looking for a "Super Communication" service or similar one that often combines voice enhancement technologies and disable it. To make it easier for you to choose the right way, we have prepared a comparative table. It will help you evaluate the effectiveness of each method depending on your situation and the Xiaomi model. Method Complexity Efficiency Requires Internet menu settings phone Low High No USSD-As you can see from the table, using the operator application is the most reliable way, since it guarantees the application of settings at the network level. However, for a quick one-time shutdown, a standard smartphone menu is enough: the effect of flight mode and reboot Sometimes users notice that after the function is turned off, the icon still appears, this may be due to caching of settings or temporary failures in network registration. In such cases, a simple but effective procedure for restarting communication modules helps. Energize flight mode on 10-15 So if you turn it off, you'll have to re-enroll the phone on the cellular operator's network, and if the function is disabled correctly, the Wi-Fi call icon will no longer appear. 📊 How do you prefer to manage communication settings?Through the phone menu Through the operator's application USSD-If that doesn't work, try restarting the device completely. SIM-This often solves problems when the phone's software settings conflict with the operator's profile, and problems and solutions are not easy, but users may encounter a number of difficulties. For example, a menu item may be inactive (grey), which usually indicates that the operator does not support the function in a given region or on a particular site. SIM-map. ⚠️ Note: If after all the manipulations the phone continues to try to make calls over Wi-Fi, check if the Wi-Fi Assistant feature is included in additional settings, which can force the wireless network to improve communication. Another common problem is the switch disappears after the system update. MIUI Developers sometimes move this item to the menu "Extended settings" or hide it deeper in the submenu SIM-Carefully examine all the tabs in the communication settings section. In rare cases, the problem lies in the very nature of the communication. SIM-If it's very old and doesn't meet the standards. 4G VoLTE/VoWiFi That's right, the phone can be unpredictable. SIM-cards for a new one in the operator’s cabin. 💡If none of the software methods worked, the problem may be on the operator's side - contact support to force the service to be turned off on their equipment (FAQ) Does disabling Wi-Fi calls affect internet speed? No, disabling this feature does not affect data rate. The Internet will work the same way it did before, just voice calls will no longer be routed over the wireless network. Do you charge for a minute of conversation over Wi-Fi? It depends on your plan. Usually, these minutes are part of the carrier's package, but if you're roaming, the charging may vary. Better check with your provider. Can you turn off the function for just one? SIM-map? Yeah, in the settings. SIM-You can select a particular SIM and disable Wi-Fi calls individually for it, leaving the second active. Why does the Wi-Fi Calling icon reappear after the reboot? Most likely, the setting is reset on the operator side or in the profile. SIM-Try to disable the service through the operator's application or USSD-code.