Mobile Internet during calls (VoLTE) on Xiaomi: why it does not work and how to set up

Have you ever noticed that Xiaomi suddenly loses its mobile Internet during a phone call? Or, conversely, have you wondered how some users continue to surf the network without interrupting the call? LTE), which allows you to transmit a voice 4G-networks without switching to outdated standards 3G/2G. But why on some Xiaomi smartphones this function works out of the box, and on others it requires manual adjustment or is not at all?

In this article, we will understand how VoLTE affects the mobile Internet during calls on Xiaomi, Redmi and other devices. POCO, Why the connection sometimes goes down, and what to do if the function doesn't activate automatically:

• 🔍 What is VoLTE and how is it different from regular calls 2G/3G
• 📱 What Xiaomi models support the technology (including budget and flagship models)
• ⚙️ Step-by-step instructions for enabling VoLTE in settings MIUI
• 🚨 Typical problems (no internet during the call, no VoLTE icon appears)
• 📡 How to check whether VoLTE works with your operator (MTS, Beeline, MegaFon, Tele2)

Spoiler: If your Xiaomi is released before 2019, the chances of VoLTE support are minimal - even after a firmware update. 13T) Sometimes it's enough to just turn on one switch in the settings.

1. VoLTE on Xiaomi: What it is and why it is needed

VoLTE (Voice over LTE) — Voice technology over fourth generation networks (4G), which replaced the outdated standards 2G and 3G. The main advantage is that during the call, the mobile Internet does not turn off, since voice and data are transmitted over the same channel. 3G/2G, Internet speed is reduced or disappears altogether.

For Xiaomi users, this means:

• 📞 Fast connection: the call is connected in 1-2 seconds (versus 3-5 seconds in a single call). 3G)
• 🎧 Better sound quality: technology HD Voice reduces noise and improves legibility
• 🌐 Continuous Internet: You can use instant messengers, maps or streaming while talking
• 🔋 Battery savings: no need to switch between networks

However, there are nuances: not all operators in Russia have completely switched to VoLTE, and some Xiaomi models (especially older or “global” versions) may not support the feature even if technically possible. 9A 2020 release is not officially certified for VoLTE in MegaFon networks, although the hardware is able to support it.

⚠️ Note: If your Xiaomi icon appears in the status bar during the call 3G or+, And the Internet goes missing -- VoLTE is not active. That's normal for models until 2018, but for new smartphones, it signals a problem with settings or operator.

2.What Xiaomi smartphones support VoLTE: the full list

Technically, all Xiaomi smartphones on Qualcomm (Snapdragon) processors since 2017 support VoLTE at the hardware level.

1. Certification of the operator (for example, MTS tests the compatibility of each device)
2. Up-to-date firmware MIUI (In older versions, VoLTE could be turned off software)
3. Correct network settings in the smartphone menu

Below is a table with models Xiaomi, Redmi and POCO, Officially supporting VoLTE in Russia (according to operators for 2026):

If your model isn't on the list, it doesn't mean VoLTE won't work. For example, the Redmi Note 9 Pro (2020) isn't officially certified for VoLTE from Beeline, but once manually set up, the feature can work. The main thing is that the smartphone supports the Band 20 (800 MHz), which is used by Russian operators for the development of the mobile phone. 4G.

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

If your smartphone supports VoLTE but the feature is not activated, follow this instruction. MIUI (12, 13 or 14).

Update. MIUI last-minute|Make sure that SIM-card 4G (nano-SIM)|Check the VoLTE coverage with your operator|Reboot your smartphone before setting up

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Steps for activation:

1. Open the Settings. → SIM-maps and mobile networks.
2. Choose yours. SIM-card (if there are several).
3. Tap on the network type (or preferred network type).
4. Choose an option 4G (preferably) / LTE or 4G/3G/2G (motor-car).
5. Go back and find the VoLTE Call option (or VoLTE, Enhanced Calls).
6. Activate the switch. If you don't have an option, see "What to do if VoLTE doesn't turn on."

After turning on next to the network indicator, an icon should appear HD, VoLTE or 4G+ If it's not there, but the Internet is not lost, it's in a "hidden" mode (this is the case with some operators).

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If after turning on VoLTE calls are interrupted or the sound is distorted, try to disable the option "Enhanced Call Quality" (Enhanced). 4G LTE Mode) in settings SIM-This can help with an unstable signal.

4. Why Xiaomi does not work VoLTE: top-5 cause

If you have enabled VoLTE, but the Internet still disappears during calls, the problem may lie in one of the following factors:

• 📵 The operator does not support VoLTE for your model, for example, Tele2 restricts the list of compatible devices.
• 📱 Outdated firmware MIUI. In versions below 12.5, VoLTE is often disabled at the software level.
• 🔄 Wrong settings APN. If the access point is manually configured, VoLTE may not be activated.
• 🛠️ Hardware defect: Damage to the modem (for example, after a fall) can block the work 4G-challenge.
• 🌍 Roaming: Some operators turn off VoLTE when roaming, even if the network supports it.

The most common situation: the icon 4G Yes, but when you call the smartphone switches to 3G. This means that VoLTE is not activated, although the network and device support it:

1. Check if the VoLTE option is enabled in the settings (see Section 3).
2. Update the firmware through Settings → About the phone → System update.
3. Reset network settings: Settings → SIM-map → Resetting mobile network settings.
4. Call the short operator number (e.g. *111# for MTS) and check if VoLTE is activated for your tariff.

⚠️ Note: Some Xiaomi models (e.g. Redmi Note 8 Pro) after upgrading to MIUI 13 VoLTE is lost in the menu, in which case only a rollback to the old firmware or manual activation through the engineering menu will help (see spoiler below).

5. VoLTE vs ViLTE vs VoWiFi: What's the difference and what's better

In addition to VoLTE, in the settings Xiaomi you can find options ViLTE and VoWiFi. let’s understand what they mean and how they affect the mobile Internet during calls:

In practice, for Xiaomi users, this means:

• If you have good coverage 4G, But VoLTE doesn't work -- try VoWiFi. This feature is available on most models with a Wi-Fi connection. MIUI 12+.
• If the carrier supports ViLTE (for example, MTS), you can make video calls without third-party applications (like WhatsApp).
• In roaming or places with poor signal, VoWiFi can be a lifesaver, but the sound quality will be worse than VoLTE.

To enable VoWiFi on Xiaomi:

1. Go to Settings. → SIM-maps and mobile networks.
2. Choose yours. SIM-map.
3. Activate the option of Wi-Fi (or VoWiFi) calls.
4. Set the Prefer Wi-Fi or Wi-Fi Only mode (if the mobile network is unstable).

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If you have a weak signal 4G, But you have stable Wi-Fi, you need to prioritize VoWiFi, which ensures that you can connect even in the basement or outside of the city, where there is no network.

6.VoLTE problems on Xiaomi: solutions for different operators

Each Russian operator has its own peculiarities of working with VoLTE on Xiaomi devices. Below are typical problems and ways to solve them for MTS, Beeline, MegaFon and Tele2.

📌 MTS

Problem: VoLTE is turned on, but after 10-20 seconds of the call, the Internet disappears.

Solution: Disable the option Improved Call Quality in Settings SIM-MTS sometimes conflicts with this feature on Xiaomi smartphones.

📌 Beeline

Problem: There is a VoLTE sign, but the sound is interrupted or distorted.

Solution: Check that the mode is selected in the network settings 4G (preferably, not only 4G. Beeline uses a backup switch to 3G low-signal.

📌 MegaFon

Problem: VoLTE works, but not activated HD-sound.

Solution: Remove all saved access points APN And let your smartphone download them automatically. → Mobile network → Access points (APN) and press Reset to default values.

📌 Tele2.

Problem: VoLTE is not enabled on supported models (e.g. Xiaomi) 11T).

Solution: Call 611 and ask to activate the service "4G-Tele2 sometimes requires manual activation even for compatible devices.

If none of these methods worked, try an alternative method:

1. Install the NetDiag app from Qualcomm.
2. Run the VoLTE Capability test.
3. If the test fails, it's the firmware or modem problem, and then you can only flash it to the custom version. MIUI (For example, xiaomi.eu).

7.VoLTE and battery: does the technology affect autonomy

Many Xiaomi users fear that VoLTE increases battery consumption due to constant operation 4G-In practice, it depends on the scenarios of use:

• ⚡ Plus for the battery: Without VoLTE smartphone when calling switches to 3G/2G, And that's because VoLTE doesn't use that power to change the network".
• ⚡ Battery Consumption: If the signal 4G When the modem is weak, it runs at the power limit to hold the connection, in which case VoLTE can increase the consumption by 5-10%.

To test the impact of VoLTE on autonomy:

1. Charge your smartphone to 100% and discharge to 20% without VoLTE (turn off the function in the settings).
2. Write down the operating time and percentage of the expense in the Settings section → Battery.
3. Repeat the test with VoLTE enabled.
4. Compare the results. If the difference is greater than 15%, turn off VoLTE in areas with weak signal.

On most modern Xiaomi smartphones (for example, Xiaomi 13 Lite or Xiaomi). POCO F5) The difference in autonomy when using VoLTE is no more than 3-5%, but on budget models (like Redmi). 10A) With weak modems, the cost can grow more noticeable.

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If you notice that with VoLTE smartphone became faster discharge, turn on the mode "Battery Saving" in the settings MIUI. It will limit the background activity of applications, but will not affect the work of VoLTE.

FAQ: Frequent questions about VoLTE on Xiaomi