How to turn off VoLTE sync on Xiaomi

In today’s digital world, users often face intrusive features that, despite the stated benefits, can cause significant discomfort in the use of a gadget. One of these technologies is Voice over LTE, which is designed to provide high quality voice communication through fourth-generation networks. However, owners of Xiaomi smartphones often notice that activation of this option leads to accelerated battery consumption and unstable mobile Internet.

Understanding how to disable VoLTE synchronization on Xiaomi is becoming a critical skill for those who want to extend the autonomy of their device without compromising basic communications. The deactivation process can vary depending on the version of the MIUI or HyperOS operating system, as well as the regional firmware installed on the device. In some cases, the standard interface hides the necessary switches, requiring the use of deeper customization methods through the engineering menu or hidden system settings.

This article provides a comprehensive analysis of all known ways to manage high-quality voice. We will look not only at standard methods through the settings menu, but also at advanced techniques for power users that allow you to bypass the restrictions imposed by carriers or shell manufacturers.

VoLTE technology: the principle of operation and the impact of the device

Voice over LTE is a standard for voice traffic exclusively over 4G packet networks, bypassing the classic 2G and 3G channels. This allows you to achieve significantly higher sound quality, reduce connection time and simultaneously use high-speed Internet during a conversation. In Xiaomi smartphones, a specialized software module integrated into the device’s radio module is responsible for implementing this standard.

Despite the obvious benefits, constant synchronization with LTE towers to maintain a voice channel can negatively affect power consumption. If network coverage in your region is unstable, the phone begins to constantly switch between signal search and connection maintenance, causing the case to heat up and discharge quickly. In addition, some users have noted problems with switching between Wi-Fi and mobile data with active Voice over LTE.

Disabling this feature puts the device back into operation mode, where voice calls are processed via traditional GSM or UMTS networks. This is especially true in areas with poor 4G coverage, where the phone will hold the signal more stable, albeit with lower sound quality.

⚠️ Note: Before making changes to your network settings, make sure your carrier supports alternative voice standards in your current location, or you may be unable to make calls.

It is worth considering that on global versions of MIUI Global firmware, this function is managed more transparently than in the Chinese versions of China ROM. In the latter cases, system restrictions can be tougher, and for full control of network protocols, it is sometimes necessary to use special codes or third-party utilities to activate hidden menus.

Standard method of disabling through the settings menu

The easiest and safest way to manage network functions is to use the standard operating system interface. In most current versions of HyperOS and MIUI 14, developers have retained direct access to the VoLTE switch, although they have hidden it deep enough into the menu structure.

Next, you should go to Mobile Networks, which is usually in the basic connection settings block. SIM-card, the system will prompt you to select a specific slot to set up. Select the SIM card that you want to disable the function, as the settings for each slot can be adjusted independently of each other.

In the menu that opens, find Use VoLTE or LTE Calls. The switch next to it should be active. Click on it to change the state on Off. After that, the status bar should disappear the corresponding icon, and the phone will switch to using the previous generation networks for voice calls.

☑️ Pre-switch check

Done: 0 / 4

In some cases, especially on devices purchased from established retailers in certain regions, carriers may block the display of this switch.If you do not find the above item, this means that the service provider or firmware hides this option, requiring the use of alternative methods of accessing system settings.

Using an Engineering Menu to Manage a Network

If the standard interface does not provide the necessary options, the engineering menu comes to the rescue - a hidden part of the system designed to test equipment and fine-tune radio modules. USSD-The most common code is ##4636##, which should open the testing menu.

Once you enter the code, you'll see a list of options on the screen. You'll need to select Phone Information. In the settings list that opens, scroll down to the section associated with setting your preferred network type. Here you can see the drop-down menu where the default LTE-enabled value is selected.

To turn off VoLTE without completely abandoning 4G Internet (which would be undesirable), you need to be extremely careful. Selecting NR/LTE/GSM/WCDMA mode usually involves a full range of technologies. However, some versions of the menu have a separate checkbox VoLTE Provisioned or Enable VoLTE. Unchecking this item forcibly disables the protocol, even if it is activated by the operator.

⚠️ Warning: Changing the parameters in the engineering menu may cause a temporary loss of signal or inability to make calls before restarting the device.

It is important to note that on newer versions of Android and HyperOS shells, access to the engineering menu through codes is often blocked for security reasons.If the code does not work or a standard dial menu opens, try using third-party apps to activate hidden features or the method through ADB described below.

Configure with ADB and system commands

For advanced users facing the toughest firmware constraints, the most powerful tool is USB debugging and the use of the ADB command line, which allows you to make changes to system databases that are not available through the GUI. First, you need to activate the developer mode by seven times clicking on the build number in the About Phone menu.

Then, in the Advanced Settings menu, enable USB Debugging. Connect your smartphone to a computer with the ADB platform tool set installed. Once you authorize the connection on your phone screen, open the terminal on your PC and enter a command to access global settings:

adb shell settings put global volte_enabled 0

This command compulsorily sets the global flag for using VoLTE to the value of "false." In some cases, you may also need to change the settings for a particular slot. SIM-The following are the adb shell settings put global carrier_volte_available_0 false, where the index corresponds to the SIM card number.

What to do if the team is not working?
If the system ignores the command, it may be overwritten by Google or the operator. In this case, try to execute the command in Safe Mode or use applications to freeze the operator's system services.> After completing the commands, be sure to restart the device so that the changes take effect. Check the network status: if the VoLTE icon is missing and the 4G Internet continues to work, then the manipulation was successful. This method is the most reliable for customizing the behavior of the radio module at a deep level. The comparison of disconnection methods and their effectiveness The choice of how to disable the VoLTE synchronization depends on the model of your device, the version of the firmware, and the version of the best solution, which will help determine the following: Method complexity Error risk Efficiency Through settings menu Low Minimum Average (depending on operator) Engineering menu Average Medium High Commands ADB High High High Maximum Third Party Applications The medium medium variable standard method through settings is preferred by most users as it does not require additional hardware and guarantees system stability. However, if the operator imposes a service at the profile level SIM-This method may not produce the desired result, and the switch will return to the active state automatically. ADB It provides complete control, but requires a PC and basic command line knowledge. A mistake in the team's syntax can lead to unpredictable behavior of network modules. However, this is the only way to guarantee that the feature will be disabled on devices with a locked interface. Possible problems and ways to solve them. LTE Users may face a number of technical difficulties, and one of the common problems is that the icon disappears. 4G/LTE This occurs when the operator's network requires VoLTE to register in the data packet. LTE. In this case, the phone can switch to EDGE (E) or 3G (H+), And that's going to slow down the Internet, and another common problem is that you can't make outgoing calls, if you're in your area, you're completely switching to the Internet. IP-telephone and disconnected old switches, disabling VoLTE will make it impossible to call. The solution is to return the settings to their original state or change the carrier to someone who supports hybrid networks, and it is also worth mentioning the situation when the settings are reset after a phone restarts. This is typical of devices with an activated operator profile, which is forced to restore its parameters, in which case the use of automation applications that will start the command to disable VoLTE at each boot system can help. 📊 Have you had any problems with the Internet? Yes, the Internet is gone. 4GIf you notice that the battery discharges faster even after the function is turned off, perhaps the problem lies not in VoLTE, but in the constant search for the network or background processes of other applications. It is recommended to conduct a battery diagnosis in the Settings menu → Battery to rule out other causes of power consumption. Impact of disconnection on communication quality and battery After successful synchronization shutdown, users often wonder: what has changed? First of all, the characteristic VoLTE icon or the icon disappears. HD The sound quality of the conversation may become a little quieter and less voluminous as narrowband codecs return, but on modern devices the difference can be almost imperceptible. The most tangible effect is in autonomy. Smartphone ceases to constantly keep active high-frequency channel LTE for voice traffic, which in conditions of weak signal 4G This gives you a significant increase in operating time. It gets less warm because the radio module is more gentle, which is typical for networks. 2G/3G. But the trade-off is that you lose the ability to talk and use fast Internet at the same time, and when you call in or out, the network will switch to the Internet. 3G, For many users, this disadvantage is outweighed by the cost savings and stability of communication in remote areas. ⚠️ Note: If you are frequently on the move (train, car), disabling VoLTE may result in more frequent connection breaks when switching between towers, as networks are affected by the network. 2G/3G They have a lower density of coverage in today's environment, so the decision to disconnect must be made individually, based on the specific operating conditions and user priorities. For someone more important sound quality and simultaneous Internet, and for others – the maximum lifetime of a smartphone from one charge. Why After Updating MIUI Often after a firmware update, Xiaomi resets custom configurations and applies new carrier profiles that may hide options previously available. API access to network settings, making old methods irrelevant. Can VoLTE be disabled for only one SIM card? Yes, on the menu, Mobile Network settings for each SIM-You can choose the first slot and turn off the function there, leaving the second one active, or vice versa. This is convenient if one operator requires VoLTE to work. 4G, And the other one is not. Does disabling VoLTE affect the work of instant messengers? No, instant messengers (Telegram, WhatsApp, Viber) use an Internet channel (Data), not a voice switching channel. Disabling VoLTE affects only classic voice calls via the SIM card. Your Internet will work normally, unless you select the "Only" mode. 2G". Is it safe to use engineering codes to shut down? Using codes to view information is safe. However, changing parameters (e.g., a preferred network type) can temporarily disrupt communication. This is not a "flash-through" and is usually treated by rebooting or resetting the network settings, but it requires caution. What if the phone stops catching the network after it's turned off? You need to reset the network settings. Go to Settings. → Connection and sharing → Resetting Wi-Fi, mobile networks and Bluetooth, which will bring all network settings back to factory values, and the phone will register again with the operator's network.