Activation of VoLTE on Poco X3 Pro: Instructions and solutions

Modern mobile standards dictate their rules, and owning a flagship device such as the Poco X3 Pro implies a high-quality voice connection in fourth-generation networks. VoLTE (Voice over LTE) technology allows voice calls to be transmitted through 4G channels, providing crystal clear HD-quality sound and instant connection without falling into 3G. However, owners of Xiaomi and Poco devices often face a situation where the function is technically supported by hardware, but hidden software or not activated automatically.

The absence of the VoLTE icon in the status bar can be caused by many factors: from the settings of a particular carrier to the features of the MIUI firmware installed on your Xiaomi Poco X3 Pro. In some cases, operators do not add their profiles to the system files of the smartphone, believing that the user must do it himself through hidden menus. Understanding the principles of network settings will help you not only turn on the function, but also ensure the stable operation of the phone in conditions of complex radio coverage.

In this article, we will discuss in detail all possible ways to activate the technology, from the standard settings menu to working with engineering code. You will learn why the icon can disappear after a reboot, how to set up the right settings. APN What are the nuances of using two SIM-The key is that you're compatible. SIM-Cards with a tariff plan that supports voice transmission through LTE.

Verification of support of the technology by the operator and SIM-card

Before you go into deep system settings, you need to make sure that your plan and SIM-The card is physically capable of working in Voice over mode. LTE. Many users forget that the service itself must be connected on the operator side, otherwise no manipulation of the phone will not give results. Modern Big Four operators most often include this option by default, but in some regions or on older tariffs, manual connection is required through the operator’s app or the operator’s app. USSD-team.

It is also worth paying attention to the physical condition. SIM-If you use a card that has been cut from a larger one or has signs of severe wear on the contacts, it can lead to unstable operation in the networks. 4G. In such cases, replacement SIM-The new card in the communication room with support for all modern standards is the most rational solution. 3G, but block domain registration IMS, necessary for VoLTE.

• 📱 Make sure that the service "Voice calls on" is activated in the settings of your tariff LTE".
• 🔄 Check if you need to update your network profile through your carrier’s application.
• 💳 Replace the old one. SIM-The new card, if used more 3-4 years.
• 📶 Make sure that your location is securely caught by the network. 4G (LTE).

⚠️ Note: Even if the slider is active in the phone menu, but the service is not paid for or connected to the operator, the icon in the status bar will not appear, and calls will be made through the phone. 3G/2G.

Basic activation through the standard settings menu

In most cases, to include a function on Poco X3 Pro is enough to use the standard shell interface MIUI. Xiaomi has made this feature prominent, but it is often hidden inside the network type selection menu. You need to go to Settings, then select O. SIM-Maps and mobile networks. This is where the main switches that control modem behavior are.

After entering the settings of a specific SIM-Find the network type or preferred network type, and select the option that contains the Preferred mark or 5G/4G/3G/2G (If the technology is supported automatically, the Use VoLTE switch will appear immediately under the network type selection or slightly lower in the list of additional options.

Sometimes the system requires a reboot to apply changes. After turning on the phone, wait 1-2 minutes for the device to register on the network. If an HD or VoLTE icon appears next to the signal level indicator, then everything went well. Otherwise, if the switch is missing or gray (inactive), you will need to use more advanced configuration methods.

Using an engineering menu to force inclusion

If the standard path fails, the engineering menu, a hidden partition of the system designed for testing equipment, comes to the rescue. On Xiaomi Poco devices, access to it is often closed, but basic functions can be called through a special code in the "caller." Enter the combination ##4636##. If the menu is opened, select Phone Information.

In the options list that opens, look for the VoLTE Provisioned or IMS Status section. There may be a switch that needs to be activated. However, on newer versions of Android and MIUI, this code may not work or contain the necessary options, in which case users have to resort to installing third-party applications such as Force LTE Only (4G/5G), which create a shortcut for the hidden test menu.

Setting up an APN access point for voice services

Often the problem lies not in the switches, but incorrect settings of the access point (APN). For the right job IMS (IP Multimedia Subsystem) the operator needs the correct configuration of the Internet connection (APN) in mobile network settings. Select your operator's active profile and check the fields.

Pay special attention to the field Type APN. It should list the types of traffic separated by commas. Usually it is default,supl,mms. VoLTE often needs to add ims or dun to work, although in modern firmware this happens automatically. If you manually change the settings, be careful: an error in one character can completely turn off mobile Internet.

• 🔍 Check what's in the "Type" field. APN" There is a parameter ims.
• 💾 Save the changes and be sure to switch the mobile Internet switch.
• 📱 Make sure that this profile is selected. APN (It's a green checkmark).
• 🔄 Reset the settings. APN to the factory, if the editing did not help.

⚠️ Warning: Do not change the Proxy and Port fields unless you know exactly what you are doing, which may make it impossible to access the Internet via mobile.

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Before changing your APN settings, take a screenshot of the original values, which will quickly restore the Internet to work if the new settings are not working.

Solving the problems with the disappearance of the icon after the reboot

One common problem with the Poco X3 Pro is that the VoLTE icon disappears after the device is restarted or even after leaving coverage, indicating that the phone cannot successfully re-register in the IMS domain.

Try resetting your network settings. Go to Settings. → Connection and sharing → Reset Wi-Fi, mobile networks and Bluetooth, which won't delete your personal data, but will return all network configurations to factory values. Then re-enter your Wi-Fi passwords and check for voice communication. In some cases, a temporary shutdown of the second helps. SIM-If you use two cards at the same time.

Also worth checking is the system updates. Xiaomi regularly releases security patches and improvements to the stability of communication. Go to Settings → About the phone and click on the logo of the version of MIUI. If a new version is available, install it. Often updates contain new configuration files for carriers that fix registration problems.

The impact of the regional version of firmware on the communication

Xiaomi owners are well aware of the existence of global (Global), European (EEA) and Chinese (CN) firmware versions. If you have re-furbished your phone or bought a version designed for another region, the list of supported VoLTE operators may differ. Global firmware often lacks profiles for some local carriers, which leads to a lack of feature.

In such cases, users sometimes resort to editing system files. carrier_policy.xml or carrier_list.xml, But this method requires Root rights and deep knowledge of the Android file system. Intruders can lead to a bootloop (cyclical reboot) of the phone. It is safer to wait for an official update or to use emulation methods of the region.

Changing the region in your phone settings (Settings → Additional settings → Region) to a country where your carrier is widely distributed (for example, India or Russia for local operators), can force you to activate the desired profile. After changing the region, the phone may require a reboot, after which the network settings will be updated.

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Changing the region in your phone settings is the safest way to get your smartphone to see your operator profile if you don’t want to reflash the device.

Frequently Asked Questions (FAQ)