How to enable VoLTE on Xiaomi Redmi Note 9 Pro: full instructions with operator check and error elimination

Why VoLTE is important for the Redmi Note 9 Pro and how to set it up

VoLTE Technology (Voice over) LTE) lets you call through 4G-network, not through outdated 2G/3G, how smartphones did it 10 For owners of Xiaomi Redmi Note 9 Pro means not only a clearer voice during a conversation, but also a lightning-fast connection of calls (without delay in the conversation). 2-3 And you can talk and use the mobile Internet at the same time at the highest speed, and without VoLTE, your smartphone falls on the phone when you call. 3G, slows down the loading of content and worsens the quality of communication.

However, many users are faced with the fact that the VoLTE option on their Redmi Note 9 Pro is either missing in the settings or does not work despite the fact that the operator supports the technology. MIUI, setting SIM-Maps and regional restrictions. In this article, we'll look at all the ways VoLTE is activated, including hidden settings for advanced users, and explain why sometimes even after the option is turned on, calls still go through the Internet. 3G.

Before you get into settings, make sure your carrier does support VoLTE in your region. For example, in 2026 MTS, Beeline and Tele2 cover more than 90% of Russia, but in remote areas there may be white spots.

Compatibility Check: Does your Redmi Note 9 Pro VoLTE support?

Not all versions of the Redmi Note 9 Pro out of the box support VoLTE, especially if the device was bought abroad or stitched with custom firmware.

• 📱 Smartphone model: VoLTE is officially supported on Redmi Note 9 Pro (codenamed joyeuse) and Redmi Note 9S (If you have another modification (e.g. Redmi Note 9 Pro Max), the instruction may not work.
• 📶 Ranges LTE: The device must support Band 20 (800 MHz) - this is the main range for VoLTE in Russia. CPU-Z (section → Bands).
• 🔄 Version. MIUI: VoLTE is stable and works on MIUI 12.5 and newer. If you have an older firmware, update the system first through Settings. → The phone. → Updating the system.

If your smartphone meets all the criteria, but VoLTE is not available in the settings, the problem may be regional restrictions, for example, some firmware for India or China block VoLTE in Russian networks, the solution is to change the MIUI region or install global firmware (for more details in the section on errors).

Step-by-step: how to turn on VoLTE on Redmi Note 9 Pro

If the compatibility check is successful, we'll move on to the setup. SIM-Card (VoLTE may not work in Dual mode) SIM firmware).

1. Open Settings and go to the section SIM-maps and mobile networks.
2. Choose yours. SIM-card (if there are several).
3. Tap on Network Type (or Preferred Network Type in older versions of MIUI).
4. In the options list, select 4G (preferably)/LTE or 4G+/LTE+ (if available).
5. Go back and find the VoLTE item (may be called High-Quality Calls or Calls). HD-Switch the slider to the on-line position.
6. Reboot your smartphone so that the changes take effect.

After the reboot, the message VoLTE should appear next to the network indicator or HD. If not, check if the Improved Mode option is enabled. 4G customized SIM-Maps (sometimes hidden under additional parameters).

Make sure that the status bar displays VoLTE| Check the Internet speed during the call (must remain 4G) | Make a test call - the connection must be instant | Try to use the Internet during the conversation (pages must load without breaks)

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Critical detail: on some firmware MIUI The VoLTE option only appears after the first successful connection to the 4G-If you are in a low-cost area LTE, Smartphone can automatically turn off VoLTE.

Hidden settings: how to force VoLTE to turn on if it is not on the menu

If you don’t have VoLTE in your settings, but your Redmi Note 9 Pro supports the technology, you can try activating it via the AT or engineering menu. These methods require caution, as improper actions can disrupt the network.

Method 1: Engineering Menu (MTK Engineer Mode)

1. Install the MTK Engineer Mode app from Play Market (MediaTek processors only).
2. Open the app and go to MTK Settings → BandMode.
3. Choose yours. SIM-map and check the box opposite LTE ONLY.
4. Go back to the main menu and select Telephony → VoLTE, then activate the option.

Method 2: AT commands (require root or ADB)

This method will require a computer with ADB drivers installed:

adb shell


su




setprop persist.radio.volte_enable 1




setprop persist.radio.vt_enable 1




reboot

After the reboot, check for VoLTE in the settings.

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If after using the engineering menu, mobile Internet disappeared, reset the network settings in Settings → SIM-maps and mobile networks → Resetting network settings.

Table: Solving common VoLTE errors on Redmi Note 9 Pro

If none of the methods worked, the problem may be in the IMEI of your device (for example, after firmware it could reset to a standard one). Check the IMEI by the command *#06#. If it consists of only zeros or does not match the original, you will need to restore through an engineering menu or service center.

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Before resetting network settings or changing IMEI Make sure to back up your data! Incorrect actions can lead to blocking SIM-map.

VoLTE and Dual SIM: Why it doesn’t work on two cards at the same time

Many Redmi Note 9 Pro users are faced with the fact that VoLTE works only on one of them. SIM-The map, and the second "falls" on 3G It's due to the hardware limitations of the Snapdragon chipset. 720G, which does not support Dual VoLTE (Simultaneous operation of VoLTE on two cards).

Here's how to get around this limitation:

• 🔄 Priority SIM: In the settings SIM-maps and mobile networks, prioritize the card that needs VoLTE. 3G/2G.
• 📶 Manual network selection: For the second SIM manually select Only 3G It's in a network setting, and it's going to prevent conflict.
• 📱 Reboot: After the shift SIM-maps in places (for example, if you want VoLTE on the second card) reboot your phone.

If you need to have a VoLTE on both SIM-If you have a mobile phone, consider using eSIM (if your carrier supports this technology). On the Redmi Note 9 Pro, you do not have an eSIM, but you can use an external adapter or change your smartphone to a model with Dual VoLTE support (for example, Xiaomi). 11T Pro).

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If you travel frequently, create separate profiles. APN each SIM-This will help to avoid conflicts when roaming.

Update firmware: how MIUI affects the work of VoLTE

One of the most common cases where VoLTE doesn't work is outdated or "curved" firmware. Xiaomi regularly releases updates that fix communication errors, but not all users install them.

• 🔄 Global vs. Chinese firmware: On Chinese versions MIUI (for example, joyeuse_cn) VoLTE can be turned off for foreign operators, so the solution is to flash the global version (joyeuse_global).
• 📲 Beta versions MIUI: If you're in a beta program, VoLTE may not work smoothly.
• 🔧 Hand-held firmware: If OTA-Update does not come, download the latest firmware from en.miui.com and install it through Settings → The phone. → Updating the system → Three points. → Select a firmware file.

After updating the firmware, be sure to reset the network settings (Settings) → SIM-maps and mobile networks → Reset network settings, otherwise new VoLTE settings may not apply.

⚠️ Note: Firmware of unofficial (custom) versions MIUI This can lead to loss of warranty and unstable operation of VoLTE. Use only official builds from the Xiaomi site.

FAQ: Frequent VoLTE questions on Redmi Note 9 Pro