VoLTE in Xiaomi smartphones: everything you need to know about the technology of voice calls 4G

Have you ever noticed that while talking on the phone, the Internet suddenly “slows down” or disappears altogether? Or that calls connect longer than usual, especially in places with unstable signal? The reason may lie in the lack of support for VoLTE, a technology that dramatically changes the quality of voice communication. In Xiaomi smartphones, this feature often works out of the box, but it is not always on the default or may not be on some models. In this article, we will understand what VoLTE is, why it is important for owners of Redmi, POCO and Mi, how to check its availability and activate, and what to do if your phone does not support it.

VoLTE Technology (Voice over) LTE) It does not allow you to send voice through outdated 2G/3G-network, and directly through the channels 4G (LTE). This means clearer sound, instantaneous connectivity, and no Internet “failures” during a conversation, but not all operators and not all Xiaomi smartphones work equally well with VoLTE. ROM) This feature may not be supported in Russian networks, and budget devices sometimes lack it due to hardware limitations. Next, we will examine all the nuances in detail, from theory to practice.

What is VoLTE and why is it important for Xiaomi?

VoLTE (from Voice over) LTE) — This is the standard for voice transmission over a fourth generation network (4G). Unlike traditional calls that use networks. 2G or 3G, VoLTE works on top of it. IP-And it's a protocol, like normal Internet traffic, and it has a few key benefits:

• 📞 Instant connection: the call starts almost immediately after pressing the call button (delay less than 1 second vs. 3-5 seconds per call) 3G).
• 🎧 Sound quality HD: wide bandwidth allows voice transmission in format AMR-WB (16 kHz), which is comparable to the quality of Skype or WhatsApp calls.
• 📶 No “switching” between networks: when a normal call the phone switches from the phone to the phone. 4G on 3G/2G, And that's why the Internet is falling. That's not happening with VoLTE.
• 🔋 Battery savings: No need to support two radios (for data and voice) at the same time.

For Xiaomi smartphones, VoLTE support is especially relevant for three reasons:

1. Many models (especially the budget Redmi and POCO) are sold in different regional versions, for example, the Redmi Note 10 Pro for India supports VoLTE, but for Europe it does not.
2. Xiaomi often releases updates that add or remove VoLTE support for specific carriers (for example, after a firmware change, the feature may disappear).
3. In some countries (for example, in Russia) operators are actively shutting down. 2G/3G-nets, moving to 4G/5G. Without VoLTE, calls will be impossible.

Important: c 2023 The year operators "Beeline" and "Tele"2» start to shut down 3G-networks in some regions of Russia. 2026 A full transition is planned for the year 4G/5G, What will make VoLTE a mandatory feature for making calls.

How to check if your Xiaomi VoLTE supports

Before you try to turn on VoLTE, you need to make sure your smartphone supports it. There are several ways to check:

Method 1: Official list of supported models

Xiaomi publishes lists of devices with VoLTE support for different regions, for example, in Russia in 2026, the following models are relevant:

How do you know the exact model? Go to Settings → About Phone → Model. If the name has the letters CN (e.g. Redmi Note 11 Pro+ 5G CN), it is the Chinese version, and VoLTE may not work in Russia.

Method 2: Checking through the Engineering Menu

The most reliable way is to go to the engineering menu and check for the option VoLTE:

1. Open the Phone app and dial ##4636##.
2. Select Phone Information (or Phone Information).
3. Scroll down to the VoLTE provisioned block. If it's Yes, it's supported.

⚠️ Note: Some firmware (e.g. HyperOS 2026) may have the engineering menu blocked. MTK Engineering Mode (for MediaTek processors) or NetMonster from Google Play.

How to enable VoLTE on Xiaomi: step-by-step instructions

If your smartphone supports VoLTE, but the feature is disabled, you can activate it manually, depending on the firmware version (MIUI or HyperOS) and the phone model.

MIUI 12-14 and HyperOS 1.0+

1. Go to Settings. → SIM-maps and mobile networks.
2. Choose yours. SIM-card (if there are several).
3. Activate the VoLTE switch (or Improved Calls).
4. Reboot the phone.

Note: Some models (e.g. POCO X3 Pro) may use the option called 4G calling or HD Voice.

For older versions of MIUI (up to 12)

On MIUI 11 and below, the path may be different:

1. Open Settings → Additional → Mobile Network.
2. Choose. SIM-map and turn on VoLTE.
3. If there is no option, update the firmware through Settings → About Phone → System Update.

⚠️ Warning: If VoLTE calls stop working or there is interference, check if your carrier supports this technology. For example, MTS and Beeline support VoLTE in all regions, and Yota only in major cities.

Why VoLTE may not work for Xiaomi

Even if your smartphone supports VoLTE, the feature may not be activated, and here are the main reasons and ways to eliminate them:

• 📵 Operator does not support VoLTE: Check with the operator if the service is available in your area. For example, Tele2 includes VoLTE only for subscribers with rates from 300 ₽/moss.
• 🔄 Outdated firmware: Update MIUI/HyperOS In many cases, VoLTE is added through the OTA-update.
• 📱 Incorrect regional firmware: If you have a Chinese version (China) ROM), VoLTE may not work with Russian SIM-So the solution is to reflash the phone to the global version.
• 🔌 Problems with SIM-map: Old ones SIM-Cards (issued before 2018) may not support VoLTE. contact the operator's cabin for a replacement.
• 🛠️ Hardware limitations: Budget models on Helio processors G35/G80 (Like Redmi. 9A) Often lacking support for VoLTE.

Compatibility table for operators and Xiaomi (2026):

How to Refuse Xiaomi to Support VoLTE

If your smartphone doesn’t support VoLTE due to regional firmware (e.g. you have a Redmi Note 11 Pro+ 5G with China ROM), you can reflash it to the global version.Caution: this voids the warranty and may cause some features (e.g. NFC) to fail.

Step-by-step:

1. Download the Global ROM firmware for your model from the official Xiaomi website (select the Stable version).
2. Unpack the archive and rename the file to update.zip.
3. Move the file to the root folder of the phone (not to the folders!).
4. Go to Settings → About the phone → System update.
5. Click on the three dots in the upper right corner and select Select the firmware file.
6. Specify the path to update.zip and wait for the installation to be completed.

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Before you run your firmware, back up your data via Settings → Additional → Backup and Reset. Also check that your battery is at least 50% to avoid crashes.

⚠️ Attention: Flashing with China ROM Globally ROM It can also block access to some Chinese services (e.g. Mi Pay) and on some models (e.g., Mi Pay, POCO X3 NFC) After the firmware is lost support 5G.

Alternatives to VoLTE: Wi-Fi Calling and ViLTE

If your Xiaomi doesn’t support VoLTE, there are two alternatives:

• 📶 Wi-Fi Calling: Calls over Wi-Fi networks, works even when there is no mobile signal, but requires stable Internet. → SIM-map → Wi-Fi Calling.
• 📞 ViLTE (Video over LTE): Video calls on 4G. Supported by Xiaomi 12/13 and some of the Redmi series with MIUI 13+.

Technology comparison:

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Wi-Fi Calling is the best alternative to VoLTE for models without support 4G-However, make sure that your operator supports this feature (e.g. MTS and Beeline – yes, Tele2 – only in some regions).

Frequent questions about VoLTE in Xiaomi