VoLTE on Xiaomi Redmi 8: how to completely disable 4G voice technology

Xiaomi Redmi 8 is one of the most popular budget smartphones of the brand, but its owners often face the need to disable VoLTE (Voice over LTE).The reasons can vary from problems with communication quality to conflicts with the operator or the desire to save battery power. In this article, we will discuss all the working ways to deactivate VoLTE on Redmi 8, including hidden settings and engineering menus, and explain why sometimes the technology turns on itself.

It’s important to understand that VoLTE is not just a “voice over 4G”, but a separate protocol that can affect the stability of calls, traffic consumption and even the operation of messengers. On Redmi 8 (model M1908C3IG/M1908C3IH), turning off VoLTE has its own nuances due to the features of the MIUI firmware. If you notice that after updating the system calls began to interrupt or the battery quickly goes down, this instruction will help to return everything to normal.

What is VoLTE and why you should turn it off on Redmi 8

VoLTE (Voice over LTE) is a 4G voice technology that should theoretically improve communication quality, but in practice, especially on low-end smartphones like the Xiaomi Redmi 8, it often results in:

• ⚡ Fast discharge of the battery - module 4G Consumes more energy with active VoLTE.
• 📶 Coverage problems – in some regions, operators have not optimized the network for VoLTE.
• 🔄 Switching between spontaneously 3G and 4G during the call, which leads to breaks.
• 💬 Conflicts with messengers (WhatsApp, Telegram), where voice messages may not be sent.

On Redmi 8, the problem is compounded by the fact that MIUI by default hides some of the VoLTE settings, and after updates they can be reset, for example, users complain that after installing MIUI 12.5 or MIUI 13, the VoLTE option is turned on automatically, even if it was manually disabled.

Another important point: on the Redmi 8 with two SIM-VoLTE cards can only work on one of them (usually on the other hand). SIM1), This is a dissonant thing if you're using different carriers, and it's because of the hardware limitations of the Qualcomm Snapdragon 439 chipset.

Method 1: Disable VoLTE via standard MIUI settings

The easiest method is to use built-in MIUI options. However, on Redmi 8, the path to these settings may vary depending on the firmware version.

1. Open the Settings app (cog icon).
2. Go to section. SIM-maps and mobile networks.
3. Choose. SIM-The card you want to disable VoLTE for (if there are two of them).
4. Slip on the network type or network settings item.
5. Find the VoLTE option (can be called 4G Voice or Improved Calls) and move the slider to the off position.

If VoLTE is not on the menu, then your version of MIUI is hiding it.

1. In Settings, select About Phone.
2. Tap the MIUI version several times until you become a developer!
3. Return to the main Settings menu and open Additional → for developers.
4. Find the VoLTE option in the Network section and turn it off.

The "VoLTE" item is not on the menu SIM-map

In the settings for developers option gray

After the reboot, the slider is turned on again.

Operator forcibly activates VoLTE (you need to call in support)-->

⚠️ Attention: On some firmware MIUI For Redmi 8, the VoLTE option can be blocked by the operator, in which case it cannot be disabled by standard means - you will need an engineering menu (see Method 3).

Method 2: Disconnecting through SIM-Manager (for two) SIM-map)

If you have a Redmi 8 with two SIM-VoLTE can only be tied to one of these cards (usually a slot). SIM1). To disable it completely or reassign it to another SIM, Follow the following steps:

1. Open the Settings. → SIM-maps and mobile networks.
2. Select Control. SIM-Cards (or Double Settings) SIM).
3. Slip on the item Voice communication 4G (or VoLTE).
4. In the list. SIM-uncheck the card with the one you want to disable VoLTE, or select Disable.

If this menu does not have a VoLTE option, try another way:

• Press the power button and select Reboot.
• After turning on the phone, check if the VoLTE item appears in the settings SIM-map.

🔹 Important: On some firmware MIUI 12.5+ For Redmi 8, the VoLTE option can be hidden under the option Additional settings in the menu SIM-If you don't have one, you can go to the engineering menu method.

MTS

Beeline

MegaFon

Tele2.

Yota

Other-->

Method 3: Engineering menu – hidden VoLTE settings

If standard methods don't work, you'll have to use the Engineering Mode, which is a hidden settings section where you can manually turn off VoLTE, even if MIUI doesn't allow it, and be careful, because the wrong changes can disrupt the network!

Instructions for Xiaomi Redmi 8:

1. Open the phone app and enter the combination: ##4636##
2. You will be taken to the Testing menu. Select Phone Information (or Phone Information).
3. Scroll down to the Set preferred network type section.
4. Select LTE only or 3G only (this will disable VoLTE forcefully).
5. Go back and find the VoLTE provisioned. If it's enabled, tap it to turn it off.

⚠️ Attention: After changes to the engineering menu, Redmi 8 may temporarily lose the network. Restart the phone to make the settings apply. If the connection does not recover, return the settings to the original state or contact the operator.

Method 4: Disabling VoLTE through USSD-operator

Some Russian operators allow you to control VoLTE through the USSD-This is the safest method, because the changes are made by the network, not the phone:

• 📱 MTS: Dial *111*4653# Follow the instructions (confirmation may be required).
• 📱 Beeline: send USSD-request *110*180# and select the option to disable VoLTE.
• 📱 MegaFon: dial *105*4653# (not available in all regions).
• 📱 Television2: USSD-team *155*4653#, But you may need a call for support.

If USSD-The team did not work, contact the operator through:

• 💬 Chats in official applications (My MTS, My Beeline, etc.).
• 📞 Hotline (numbers are usually listed on the operator's website).

⚠️ Note: Operators may be forced to turn on VoLTE on some tariffs (for example, with unlimited calls), in which case the technology can only be turned off through support or change of the tariff plan.

💡

Before calling the operator, check if you have a 4G Voice service activated in your personal account, sometimes you can turn it off yourself through the web version of the operator's website.

Problems after VoLTE shutdown and their solutions

Disabling VoLTE on Xiaomi Redmi 8 can have unexpected consequences, and here are the most common problems and ways to fix them:

If you notice that calls have gotten worse after you shut down VoLTE, try:

1. Enable Voice Improvement in Call Settings (Settings → Apps → Phone → Voice Improvement).
2. Use a headset or Bluetooth headphones for better sound.
3. Check if the option is not included HD-The voice (sometimes it conflicts with the voice) 3G-linkage).

💡

If after the shutdown of VoLTE lost mobile Internet, check APN-your operator's settings. In many cases, they're reset when you change the type of network.

How to check if VoLTE is disabled

To make sure that VoLTE is successfully deactivated on your Xiaomi Redmi 8, use one of the following methods:

1. Call another phone and look at the network indicator when you call: If you see an HD or VoLTE sign next to the signal level, the technology is still active. If it's 3G or H+, VoLTE is disabled.

#

#

VoLTE provisioned

Disabled

Network Signal Guru

Voice Network

🔹 Important: On some firmware MIUI The VoLTE indicator may disappear from the status bar, but the technology remains active. To check for accuracy, call ##4636## and see the Voice Network Type bar on the Phone Information menu. LTE — VoLTE is working.

FAQ: Frequent questions about VoLTE on Xiaomi Redmi 8