VoLTE on Xiaomi Redmi phone: what it is, how to enable and fix problems

Have you ever noticed the word VoLTE in the status bar of your Xiaomi Redmi and wondered what it means? 4G, And yet, the Internet is stable, and it's the key to high-quality mobile communications in today's networks, but many people still don't understand how it works and what it does.

In this article, we will understand what VoLTE is on Xiaomi Redmi smartphones in simple language: from the basic definition to the intricacies of settings. You’ll learn which Redmi models support the technology, how to manually activate it (if it’s disabled by default), and what to do if VoLTE suddenly disappears after the update. MIUI. And also – reveal a little-known fact: why operators sometimes block VoLTE on budget models Xiaomi, even if the device technically supports the function.

Whether you are a beginner or a seasoned user, after reading this, you can diagnose VoLTE problems and optimize the quality of calls on your device, starting with the most important thing: what is behind this acronym and why, without it, modern smartphones lose half of their capabilities.

1.What is VoLTE on Xiaomi Redmi: A Simple Explanation

VoLTE (Voice over LTE) — This is a voice transmission technology over the network. 4G LTE, Not through outdated networks. 2G/3G, The main difference is that your voice is converted into digital data packets and transmitted over the same channel as the Internet:

• 📞 Instant connection: the call is connected to 1-2 seconds against 5-10 second-in-second 2G/3G).
• 🎙️ Clean sound: wide bandwidth allows voice to be transmitted in format HD Voice (up to 24 kHz vs. 8 kHz) in older networks).
• 📶 Without data breaks: you can talk and use the mobile Internet at full speed.

Before the appearance of VoLTE when calling the smartphone automatically switched from 4G on 2G/3G, And that's caused the Internet to drop or even stop downloading, and VoLTE doesn't do that, because the connection is stable, so for example, you can keep watching YouTube or use your navigator while you're talking without delay.

On Xiaomi Redmi smartphones, VoLTE support is implemented at the hardware and software level, but there is a caveat: even if your model is technically compatible with the technology, it depends on:

• 📡 Support for VoLTE by your mobile operator (not all regions of Russia and the CIS are covered).
• 📱 Firmware versions MIUI (In older assemblies, the function can be disabled).
• 🔧 The correct settings in the phone menu (sometimes VoLTE is turned off by default).

2.What Xiaomi Redmi models support VoLTE?

Almost all Xiaomi Redmi smartphones released after 2018 support VoLTE at the hardware level.

Important: Even if your model is on the supported list, VoLTE may not work for the following reasons:

• 🔄 An outdated version MIUI (Update the firmware through Settings → The phone. → Updating the system).
• 📵 SIM-Old-style map (required) USIM or nano-SIM with support 4G).
• 🚫 The operator has not activated the service for your tariff (for example, Tele2 may require the connection of the option "Voice through" 4G").

3.How to enable VoLTE on Xiaomi Redmi: step-by-step instructions

If your Redmi supports VoLTE but the feature is disabled, follow this instruction.The process may vary slightly depending on the version. MIUI, The overall pattern is the same for all models.

Step 1. Check for option in settings

1. Open the Settings. → SIM-maps and mobile networks.
2. Choose yours. SIM-card (if there are several).
3. Find High Quality Voice (VoLTE) or Volta Calls.
4. Activate the switch.

Step 2: Update your operator settings (if VoLTE doesn’t appear)

• Go to Settings → About the phone → System update.
• Click on the three dots in the upper right corner and select Update Operator Settings.
• Reboot the phone.

Step 3: Reset network settings (if nothing helps)

⚠️ Warning: This operation will delete all stored Wi-Fi networks and Bluetooth passwords!

1. Open the Settings. → Memory and SIM-map → Resetting network settings.
2. Confirm the action.
3. After restarting, re-enable VoLTE according to the instructions above.

If after all the manipulations, VoLTE did not work, the problem may lie in:

• 🔧 Firmware: Some custom assemblies MIUI (For example, xiaomi.eu requires manual activation via an engineering menu.
• 📡 Operator: Contact Support and check if the service is activated for your number.
• 🛠️ Hardware malfunction: modem damage (rare but occurs after falls or moisture hits).

4. Why VoLTE doesn’t work on Xiaomi Redmi: Top-5 causes and solutions

Even if you turn on VoLTE correctly, it can suddenly go missing or be unstable, and here are the most common reasons and ways to address them:

🔴 Problem 1: VoLTE disappears after update MIUI

After installing the new firmware version, network settings may reset.

1. Go to Settings → Applications → Application Management.
2. Find the phone and press the Warehouse. → Clear the data.
3. Reboot your phone and turn on VoLTE again.

🔴 Problem 2: Operator does not support VoLTE for your tariff

Some operators (e.g. Yota or regional providers) may block VoLTE for individual tariff plans.

• Call in support of the operator and request the activation of the service "Voice through" 4G" or volte".
• If the operator refuses, consider changing the tariff or provider.

🔴 Problem 3: Conflict with two SIM-map

On dual-SIM models, Redmi VoLTE can only work on one of the two models. SIM-The decision:

1. Open the Settings. → SIM-maps and mobile networks.
2. Choose. SIM-The card you want to activate VoLTE for.
3. Turn off the option of Volta calls for the second SIM.

🔴 Issue 4: Incompatible firmware (castom or global)

If you have installed an informal firmware (like LineageOS or Pixel Experience), VoLTE may not work due to a lack of operator certificates.

• Get back to the official one. MIUI via Fastboot.
• Or find custom firmware with built-in VoLTE support for your model.

🔴 Problem 5: Hardware modem failure

If the VoLTE does not work on any firmware and with any SIM-- I'm not sure if the modem is malfunctioning:

• Phone's not catching the net. 4G generally.
• Calls are interrupted or the sound is distorted.
• The modem is not defined in the engineering menu (#4636##).

Solution: Contact Xiaomi for diagnostics, and 80 percent of the time, flashing the modem through the phone helps. QCN-file.

💡

If the VoLTE is lost when switching between 4G and 3G, Try to manually lock the network 4G in settings: Settings → SIM-map → Preferred type of network → Only LTE.

5. VoLTE vs ViLTE vs VoWiFi: What's the difference and which is better?

In addition to VoLTE, Xiaomi Redmi smartphones can meet other voice communication technologies over the Internet: ViLTE and VoWiFi. Let's see how they differ and which one is preferable.

On Xiaomi Redmi smartphones, these technologies often work together, for example, if you are in a low-cost zone. 4G, The call will automatically switch to VoWiFi (if connected to Wi-Fi) to check for support:

1. Open the Settings. → SIM-maps and mobile networks.
2. Find Calls options via Wi-Fi and Video Calls.
3. Activate them if they are available.

Which option should I choose?

• 🏙️ In a city with good coverage 4G — VoLTE.
• 🏡 Home or office with stable Wi-Fi – VoWiFi.
• 🎥 For video communication – ViLTE (if the operator supports the).

💡

VoWiFi is a great alternative to VoLTE in places with poor mobile signal but weak Wi-Fi (such as basements or country houses).

6.How to check if VoLTE works on your Xiaomi Redmi?

There are several ways to make sure that VoLTE is active and used for calls:

🔍 Method 1: Indicator in the status bar

When you call, look at the top of the screen.

• 📶 Badge 4G/4G+ + voLTE HD — technology.
• 📶 Only 3G/H+ — VoLTE is not used (the call goes through outdated networks).

🔍 Method 2: Engineering menu code

Enter the combination in the phone application:

##4636##

On the menu that opens:

1. Go to the tab Information about the phone.
2. Check the line VoLTE provisioned - should be 1.
3. When calling, look at the Voice Network Type – if specified LTE, It works.

🔍 Method 3: Test call

Call another phone with VoLTE support (e.g. iPhone or other Xiaomi) if:

• ✅ The call was connected instantly (no horns) – VoLTE is active.
• ✅ The sound is clear, no noise - used HD Voice.
• ✅ The Internet continues to work during a conversation – confirmation of VoLTE.

⚠️ Note: On some Redmi models (e.g. Note 9 Pro), the VoLTE indicator may not appear in the status bar even if the technology is working.

7. VoLTE and battery: does the technology affect charge consumption?

Many users fear that VoLTE increases battery consumption due to constant activity. 4G-Let's see if that's true.

How does VoLTE affect the battery:

• ⚡ Pros: There is no need to switch between 4G and 3G, What saves energy on reconnection.
• ⚡ Cons: 4G-The modem consumes more energy than 2G/3G, The difference is minimal (about) 5-10% day by day with active use).

The results of the tests (on the example of Redmi Note 10 Pro):

• 📞 VoLTE call (5 minutes) – expense ~1% charge.
• 📞 Calling by 3G (5 minutes - consumption ~0.8% charge.
• 📡 Continuous connection to 4G (without calls - expense ~2-3% hourly.

How to reduce battery consumption when using VoLTE:

1. Activate Traffic Saving Mode in Settings → Battery.

Bottom line: VoLTE has little impact on the autonomy of modern Xiaomi Redmi smartphones. The difference in battery consumption is so small that it is overshadowed by the advantages of the technology (sound quality, connection speed). If you notice significant drainage of charge after activating VoLTE, the problem is more likely:

• 🔄 Background processes (check Settings) → Battery → Battery utilization).
• 📡 Bad signal. 4G (Your phone is wasting energy searching for a network).
• 🛠️ Battery Failure (if Phone is Over 2 Years Old).

FAQ: Frequent questions about VoLTE on Xiaomi Redmi