VoLTE on Xiaomi: why you need it, how to enable and fix problems

Have you ever noticed that while talking on the phone, the Internet suddenly disappears and the quality of communication leaves much to be desired? Most likely, it is due to the lack of support for VoLTE, a technology that radically changes the way we approach voice communication. On Xiaomi smartphones (especially in Redmi, POCO and flagship series), this feature is often turned off by default or fails. In this article, we will understand what VoLTE is, why it should be used by Xiaomi owners, and give step-by-step instructions for setting up, from checking support to solving typical errors.

It is pointless to argue about the importance of VoLTE: operators around the world are actively switching networks to this standard, abandoning outdated protocols. For example, in Russia, since 2023, MTS, Beeline and MegaFon have begun to limit 3G to 4G/5G, and without VoLTE, calls on such networks are simply impossible. But even if your Xiaomi supports the technology, this does not guarantee its correct operation: sometimes you need to manually configure, update firmware or even reset network parameters. Next, everything you need to know to avoid being left without communication at the most inopportune moment.

What is VoLTE and why is it important for Xiaomi?

VoLTE (Voice over LTE) — This is a voice transmission technology over the network. 4G, Unlike traditional calls that are used 2G/3G. The main advantage: calls via VoLTE do not break the Internet connection, and the sound quality is comparable to that of the Internet. IP-This is especially true for Xiaomi owners for three reasons:

  • 📶 Battery savings: without VoLTE, the smartphone is constantly switching between 4G (for the Internet) and 3G/2G (for calls, which increases energy consumption.
  • 🎧 Clean sound: technology supports codec HD Voice that removes noise and improves legibility.
  • ⚡ Fast connection: call setup time is reduced from 5-7 seconds to 1-2.

Not all Xiaomi models work equally well with VoLTE, however: For example, the budget Redmi 9A or POCO M3 can only support the function on certain firmware, and flagships like Xiaomi 13 Ultra can require manual activation. Moreover, even if the smartphone is technically compatible, the operator can block VoLTE for specific devices (especially on custom firmware such as MIUI Global or EU ROM).

It's important to understand that VoLTE is not just a "geek feature," it's a necessity. As early as 2026, many operators are starting to turn off the service. 3G-network, and without support for voice transmission 4G You're at risk of being left without the ability to call. In Europe, for example, Vodafone and Deutsche Telekom have completely abandoned the use of the phone. 3G, Tele2 has announced similar plans in Russia.

📊 Your operator supports VoLTE?
Yeah, it's working.
Yeah, but with mistakes.
No, he doesn't.
I don't know.

How to check if your Xiaomi VoLTE supports

Before you set up VoLTE, make sure your smartphone supports it. The methods of verification depend on the model and version of MIUI:

  1. Check the official list of compatible devices on the operator’s website. For example, MTS has a page with supported models (look for your Xiaomi in the list).
  2. Look at the settings: Settings → SIM-maps and mobile networks → [Choose. SIM] → Enable VoLTE If no point – your model or firmware does not support the function.
  3. Use the USSD codes: For MTS: dial *111*54# and call. For Beeline: *110*180#. For MegaFon: *105*00#.

The answer should include support for VoLTE.

If none of the methods worked, check the IMEI of your Xiaomi on the IMEI.info website. The Network section should have the line VoLTE supported: Yes. Note: even if the smartphone supports the technology, the operator can block it (especially on devices with unofficial firmware).

What if VoLTE is not displayed in the settings?
If the "VoLTE" item is not on the menu, it may mean: 1. MIUI (Update the firmware). 2. SIM-The card does not support VoLTE (replace with the USIM). 3. Operator blocks the function for your model (try changing your network profile via ##4636##). 4. Device from another region (e.g. Chinese version for domestic market).

Step-by-step: how to enable VoLTE on Xiaomi

If your Xiaomi supports VoLTE but the feature is disabled, follow this instruction.The process may vary slightly depending on the version of MIUI (for example, in MIUI 14 the menu looks different than in MIUI 12), but the general logic is maintained.

Update MIUI to the latest version

Make sure that SIM-card USIM

Check out 4G coverage in your area

Battery charge of at least 30%-->

Method 1: Through standard settings

  1. Open the Settings. → SIM-maps and mobile networks.
  2. Choose yours. SIM-card (if there are several).
  3. Find Enable VoLTE (or Voice Calls over 4G) and activate the switch.
  4. Reboot your smartphone.

Method 2: Through the Engineering Menu (if VoLTE is not displayed)

  1. Open the Phone app and dial ##4636##.
  2. Go to the phone information section.
  3. In the drop-down menu, select LTE only or LTE/WCDMA/GSM auto.
  4. Go back to the basic settings and check for the appearance of the VoLTE item.

Method 3: Update the operator configuration

Sometimes VoLTE doesn't work because of the operator's outdated settings.

  1. Go to Settings → About Phone → Update MIUI.
  2. Click on the three dots in the top right corner and select Configuration Update.
  3. Wait for the process to be completed and restart the device.

Note: In some countries (e.g. Japan) local VoLTE is required. SIM-map.