How to Enable VoLTE Sync on Xiaomi: A Complete Guide to Error Solutions

VoLTE Technology (Voice over) LTE) allows you to call through the network 4G, It's a way to get better communication and a faster connection, but on Xiaomi, Redmi and other smartphones. POCO This feature is often disabled by default or unstable. If your device is not synced with VoLTE, you see the icon. 4G instead of VoLTE or HD — The problem lies in the operator settings, firmware or hardware limitations.

In this article, we will discuss all ways to enable VoLTE on Xiaomi, from standard settings to hidden parameters of the engineering menu, pay special attention to synchronization with the networks of MTS, Beeline, MegaFon and Tele2, and also solve typical errors such as the lack of an option in the menu or constant communication interruptions. If you have already tried to activate VoLTE through Settings → SIM-Maps and mobile networks, but nothing worked out – don’t close the page: there will be no obvious solutions.

We will warn you right away: on some models (for example, Xiaomi Mi). A1/A2 or the old Redmi Note. 5/6) VoLTE may not be supported at the hardware level. Check your device’s compatibility with the technology from the operator or on the Xiaomi website (list of officially certified models).

Please also note that after the update MIUI 13/14 The way VoLTE setups could have changed. If you have a new firmware version, use the alternative methods in the Hidden Options section.

Step 1: Check your smartphone’s VoLTE support and SIM-card

Before you set up VoLTE, make sure your device and SIM-The map supports the technology. Here are the key points:

• 📱 Smartphone model: VoLTE works on most Xiaomi devices since the Redmi Note 7 (2019 Exceptions are budget models like Redmi. 9A/9C or devices for specific regions (e.g. Indian versions).
• 📶 In Russia, VoLTE is officially supported by MTS, Beeline, MegaFon and Tele2, but the coverage may vary by region.
• 🔄 Type SIM-VoLTE requires nano-SIM with support USIM (universal SIM). Older cards (before 2015) may not be suitable.
• 📡 Network 4G: VoLTE only works in the coverage area. LTE. If you have a display. 3G or+, technology not available.

To check the compatibility of your SIM-map:

1. Call the operator (for example *111# for MTS or *105# for Beeline).
2. Ask them, “Does my husband support me?” SIM-VoLTE card and whether the service is activated?»
3. If the service is inactive, ask to connect (usually free of charge).

⚠️ Note: On some tariffs (for example, “for laptop” or “only the Internet”), VoLTE can be blocked even with support SIM-Check with the operator.

Step 2: Standard way to enable VoLTE in settings MIUI

Most of the Xiaomi devices with MIUI 12 and later, the VoLTE option is enabled via the main menu:

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. In the list, select 4G (preferably) or LTE.
5. Go back and find the VoLTE option (or Voice via VoLTE). LTE, Improved calls. Switch the slider to the On position..

If VoLTE is not on the menu, don't panic.

• 🔄 You have an unofficial firmware installed (for example, LineageOS or customized firmware). MIUI).
• 📱 The smartphone model does not support VoLTE in your region (see Step 1).
• 📡 The operator does not provide the service in your location.

On certain devices (e.g, POCO X3 Pro or Redmi Note 10 Pro option VoLTE may be hidden under a different name:

Update the firmware to the latest version|Make sure that SIM-card USIM|Check the cover. 4G in your region|Activate the service with the operator (if required)

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Step 3: Enable VoLTE through the Engineering Menu (for experienced)

If the standard method didn’t work, try activating VoLTE through an engineering menu (also known as ##4636##) which is suitable for devices where the option is hidden by the manufacturer.

Instructions:

1. Open the Phone app and enter the combination: ##4636##.
2. In the menu that appears, select Phone Information (or Phone Information).
3. Scroll down to the Set preferred network type section.
4. Select LTE only or LTE/WCDMA/GSM auto.
5. Go back up and find the VoLTE provisioned option. If it's disabled, tap it to turn it on.

Critical: some firmware, after turning on VoLTE in the engineering menu, requires a smartphone reboot. Without it, the changes will not apply!

If after these actions, VoLTE does not work:

• 🔧 Check if your network settings have reset after a reboot (sometimes). MIUI defaults).
• 📶 Try manually selecting the operator network in the settings (Settings) → Mobile network → Network operators).
• 🔄 Update the operator profile (see Step 5).

⚠️ Note: Do not change other options in the engineering menu unless you understand their purpose. For example, incorrect Band selection settings can lead to loss of network.

Step 4: Update the operator profile to enable VoLTE to work properly

If VoLTE is on but not working (calls are sent through the phone) 3G, pin HD It doesn't appear, the problem may be in the operator's outdated profile:

For MTS, Beeline and MegaFon:

1. Open the Settings. → SIM-maps and mobile networks.
2. Choose yours. SIM-map.
3. Click Update Carrier Settings (or Update Carrier Settings).
4. Confirm the download and wait for the notification of success.

For Tele2:

• Send. SMS textual PROFILE 1515.
• Or call 611 and request a profile update.

If the update option is not available in the menu:

• 📱 Install the official application of the operator (My MTS, Beeline Pro, etc.) and check for updates there.
• 🔄 Reboot your smartphone after updating your profile – sometimes changes only apply after a reboot.

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If VoLTE still doesn't work after you update your profile, try temporarily turning off Wi-Fi and restart your phone. Sometimes the conflict between Wi-Fi Calling and VoLTE blocks voice calls through your phone. 4G.

Step 5: Solving Typical VoLTE Issues on Xiaomi

Even after you set up the right VoLTE, it can be unstable, and we'll look at some of the most common errors and their solutions.

Problem 1: VoLTE turns on, but shuts down after a few minutes

Causes and solutions:

• 🔋 Battery savings: Turn off the power saving mode for SIM-maps in settings (Settings) → Battery → Energy saving for applications).
• 📶 Weak signal. 4G: VoLTE requires stable coverage. If the signal is weak, the phone automatically switches to the radio. 3G. Try changing your location.
• 🔄 Conflict with Wi-Fi Calling: Disable Wi-Fi calls in settings (Settings) → SIM-map → Wi-Fi Calling).

Problem 2: No VoLTE option in the settings

Possible causes:

• 📱 Outdated firmware: Update MIUI Up to the latest version (Settings) → The phone. → Updating the system).
• 🔧 Unofficial firmware: Install the official global or Russian version MIUI.
• 📡 Operator does not support VoLTE: Check the list of compatible operators on the Xiaomi website.

Problem 3: VoLTE works, but the sound is interrupted

Decisions:

• 🔊 Turn off sound improvement in call settings (Settings) → Sound. → Sound quality).
• 📞 Try using headphones or speakerphones - sometimes a problem with the phone's speaker.
• 🔄 Reset network settings (Settings) → SIM-map → Resetting network settings).

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If none of these methods worked, check to see if VoLTE is blocking your plan.Some operators (like Tele2) are restricting VoLTE on unlimited internet rates.

Step 6: Alternative methods of activating VoLTE

If the standard methods didn’t work, try these options:

Method 1: Using the Xiaomi Hidden Settings app

This app allows you to include hidden functions MIUI, including VoLTE:

1. Download Xiaomi Hidden Settings from Google Play.
2. Open the app and go to Network & Connectivity.
3. Find the Enable VoLTE option and activate it.
4. Reboot your smartphone.

Method 2: Manual addition APN VoLTE

Sometimes VoLTE doesn’t work because of incorrect settings. APN. Add a new profile:

1. Go to Settings. → SIM-map → Access points (APN).
2. Click Add and enter settings for your operator: Operator Name APNAPNType APN MTSmtsinternet.mts.rudefault,supl,ims Beelinebeelineinternet.beeline.rudefault,supl,ims,xcap MegaFonMegafoninternetdefault,supl,ims Television2tele2internet.tele2.rudefault,supl,ims
3. Save the settings and select a new one. APN.
4. Reboot the phone.

Method 3: Resetting network settings

If VoLTE has previously worked, but suddenly stopped:

1. Go to Settings. → SIM-maps and mobile networks.
2. Click Reset Network Settings (or Reset Network Settings).
3. Confirm the reset and restart the device.
4. After restarting, re-enable VoLTE (see Step 2).

⚠️ Attention: Network reset will delete all stored Wi-Fi passwords and associated Bluetooth devices.

Step 7: Features of VoLTE inclusion on popular Xiaomi models

Some Xiaomi devices have unique nuances when configuring VoLTE. Consider the most common models:

Redmi Note 10/10 Pro/11

On these smartphones, VoLTE is enabled in the standard way, but may conflict with the Dual function. 4G (simultaneous SIM into 4G). If the VoLTE does not work:

• Turn off Dual. 4G customized SIM-map.
• Use VoLTE on only one of them. SIM-map (usually on the map) SIM 1).

POCO F3/4/X3 Pro

On the devices. POCO The path to VoLTE settings may be different:

1. Go to Settings. → SIM-maps and mobile networks → Additionally.
2. Turn on Voice through LTE and Enhanced Challenges 4G.

Xiaomi Mi 11/12/13

On flagships, VoLTE usually works out of the box, but after upgrading to MIUI 14 could be missing:

• Update the firmware to the latest version.
• Reset your network settings (see Step 5).
• If the problem remains, contact Xiaomi support (you may need to flash the communication module).

Xiaomi Redmi 9/9A/9C

Budget models may not support VoLTE at the hardware level.

• Dial ##4636## and see if there is a VoLTE provisioned option.
• If it is not, your device does not support the technology.

FAQ: Frequent questions about VoLTE on Xiaomi