How to turn VoLTE on Xiaomi: All ways + problem solving

VoLTE (Voice over LTE) technology allows you to call over a 4G network, providing clearer sound and faster connection. On Xiaomi smartphones, this feature is often disabled by default or hidden in deep settings. In this article, we will discuss all the current ways to enable VoLTE on devices with MIUI 12-15 and the new HyperOS, and consider typical errors and their solutions.

It’s important to understand that VoLTE support depends not only on the smartphone model, but also on the carrier. Even if your Redmi, Poco or Xiaomi is technically compatible with the technology, the operator can block its operation at the level of the operator. SIM-Before setting up, we recommend you to make sure that your tariff supports VoLTE - this information can be checked on the operator's website or through the application "My MTS / Beeline / Telephone".2/MegaFon".

Check VoLTE support on your Xiaomi

Before you try to turn on VoLTE, you need to make sure your smartphone supports this technology.

1.Device model: VoLTE is available on most Xiaomi smartphones starting with the Redmi Note 4X (2017) and later. A full list of supported models can be found on the official Xiaomi website. Pay special attention to budget models - some of them (for example, Redmi 9A or Poco C31) may not support VoLTE on all carriers.

2. firmware version: VoLTE may not be available in older versions of MIUI. Update to the latest version via Settings → About Phone → System Update. For HyperOS (the new Xiaomi shell), VoLTE support is implemented better, but additional settings may be required.

3. SIM-card: VoLTE only works with nano-SIM cards.If you are using a micro-SIM or an older card (issued before 2018), contact the communication salon for a replacement. SIM-The card is inserted into the first slot (on some models, VoLTE works only with the main slot). SIM).

• 📱 Supported models: Xiaomi 11/12/13 series, Redmi Note 10/11/12, Poco F3/4/5, Mi Mix 3/4 newer
• 🚫 Problem models: Redmi 9A/9C, Poco M2/M3 (limited support for VoLTE)
• 🌍 Operators: VoLTE officially support MTS, Beeline, MegaFon and Tele2 (but there may be regional restrictions)

Critical information: On smartphones Xiaomi with two SIM-VoLTE cards can only work on the main SIM (slot 1. If you use two cards of the same operator, the function will only be active for the one inserted in the first slot.

Method 1: Enabling VoLTE through standard settings

The easiest way to activate VoLTE is to use the built-in MIUI or HyperOS settings. The instructions are suitable for most modern models:

1. Open the Settings app (cog icon).
2. Go to section. SIM-Maps and mobile networks (or mobile network on HyperOS).
3. Choose yours. SIM-card (if two of them).
4. Click on Network Type or Preferred Network Type.
5. Turn on the VoLTE switch (or 4G Voice Calls).
6. Confirm the changes and restart the smartphone.

If the VoLTE item is not on the menu, it could mean:

• 🔄 Your firmware is outdated (update the system)
• 📶 The operator does not support VoLTE for your model.
• 🔧 The function is hidden and requires activation through the engineering menu.

Method 2: Activate VoLTE via the Engineering Menu (MTK/Qualcomm)

If standard settings don’t work, you can try turning on VoLTE through an engineering menu, a method that works on most Xiaomi smartphones with Qualcomm Snapdragon or MediaTek processors, but you need to be careful that wrong actions can disrupt the network.

Instructions for Qualcomm (Snapdragon 6xx/7xx/8xx):

1. Open the Phone app.
2. Enter the code ##4636## (the test menu will open).
3. Select Phone Information (or Phone Information).
4. Scroll down to the Set preferred network type section.
5. Select LTE only or LTE/UMTS auto.
6. Go back and turn on the VoLTE provisioned switch.
7. Reset the device.

For MediaTek (Helio Gxx/Pxx):

1. Enter the code ##36446337## (EngineerMode MTK).
2. Go to Connectivity → Telephony.
3. Select Network Setting → VoLTE.
4. Activate the Enable VoLTE option.
5. Save the settings and restart the smartphone.

Attention! Changes to the engineering menu can lead to unstable network operation. If after activation of VoLTE mobile Internet or calls disappear, return the settings to the original state or reset the network through Settings → SIM-maps and mobile networks → Resetting network settings.

Method 3: Manually add APN for VoLTE

Sometimes VoLTE doesn’t work because of the wrong APN (Access Point Name) settings, a method that is especially relevant for Tele2 and Iota, where settings are often confused after a firmware update.

To add APNs to VoLTE:

1. Open the Settings. → SIM-maps and mobile networks.
2. Choose yours. SIM-map and press Access Points (APN).
3. Click on the three dots in the top right corner and select New APN.
4. Fill in the fields according to the table below (options for popular operators).
5. Save the settings and restart the smartphone.

After adding a new APN, select it from the list and activate it. After 5-10 minutes, check for the HD or VoLTE icon to appear in the status bar during the call. If the icon doesn't appear, try another method.

Xiaomi VoLTE Problems and Their Solutions

Even after you set up the VoLTE correctly, let’s look at the common bugs and how to fix them:

1.Volte icon appears, but calls go through 3G

This is a common problem on Xiaomi with HyperOS.

• 🔄 Switch the network type from 4G/3G/2G (car only 4G customized SIM-map.
• 📱 Remove and add again APN (see method 3).
• 🔧 Reset network settings through Settings → SIM-map → Resetting network settings.

2.VolTE is working, but the battery is quickly draining

Activation of VoLTE can increase battery consumption 5-15% owing to the constant 4G-Modem solutions:

• 🔋 Enable the energy saving mode for SIM-maps in Settings → Battery → Energy conservation SIM-map.
• 🌙 Turn off VoLTE overnight via Settings → SIM-map → VoLTE → Schedule (available on MIUI 14+).
• 🔄 Use adaptive mode. 4G/3G instead of permanent 4G.

3 After the update, VoLTE was missing

MIUI or HyperOS updates sometimes reset VoLTE settings.

• 🔄 Back to factory settings APN (menu APN Click "Reset to factory").
• 📲 Reinstall. SIM-map (take out and paste back in).
• 🔧 Repeat the settings through the engineering menu (method 2).

⚠️ Note: If after all the manipulations VoLTE is not working, check whether your operator blocks it. Some tariffs (for example, "For laptop" from MegaFon or "Limitless Internet" from Tele2) do not support voice calls on the Internet. 4G. Please check this information in the operator’s personal account or through USSD-request *111#.

VoLTE on Xiaomi with two SIM-cards: features of the configuration

On dual-SIM smartphones Xiaomi (for example, Redmi Note 12 Pro)+ Xiaomi 13T) VoLTE usually only works on the first SIM-This limitation is due to the hardware architecture of Qualcomm and MediaTek modems, which do not support simultaneous VoLTE operation on two cards.

How to set up VoLTE for the second SIM:

1. Change it. SIM-cards in places (transfer the main card to slot 2, and the second - to slot 1).
2. Enable VoLTE for the new “first” SIM via settings (method 1).
3. If VoLTE is working but you need to return the cards back, use the switch SIM default settings → SIM-map → SIM call-in.

Some models (such as the Poco F5 or Xiaomi 12S Ultra) have a hidden option to activate VoLTE on the second SIM via the engineering menu:

Enter ##4636## → Phone Information → Select SIM2 → Enable VoLTE provisioned

Important: Simultaneous operation of VoLTE on two SIM-Maps are only available on flagship models with Snapdragon 8 Gen 2 modem+ (For example, Xiaomi 13 Pro or Redmi K60 Ultra) and requires special firmware from the operator.

Verification of VoLTE and communication quality test

To make sure that VoLTE actually works, follow the following steps:

1. Visual check: During a call, an HD, VoLTE or 4G icon should appear in the status bar next to the signal level indicator. On HyperOS, the icon may look like a VoLTE ticked.

2. Connection speed test: VoLTE calls connect almost instantly (1-2 seconds vs. 3-5 seconds on 3G).Ask a friend to call you and record the time from tapping to starting a conversation.

3. Audio quality check: During a VoLTE call, the sound should be cleaner, without noise or interruption. Use an online sound quality test for the test.

4. USSD-query: Dial ##4636##, select Phone Information and check Voice Network Type if it says LTE or IMS, VoLTE is working correctly.

If VoLTE is enabled but the communication quality is worse than 3G, it may be due to:

• 📶 Weak signal. 4G in your area (check the coverage on the operator's website)
• 🔧 Wrong settings. APN (repeat method 3)
• 📱 Hardware limitations of the model (budget smartphones may have a weak modem)

💡

If VoLTE is unstable, try turning off Wi-Fi Calling (in settings) SIM-These two functions sometimes conflict, especially on firmware. MIUI 13 and below.

FAQ: Frequent questions about VoLTE on Xiaomi