VoLTE on Xiaomi smartphones: why you need, how to configure and fix errors

Have you ever noticed that VoLTE is in your Xiaomi status bar and wondered what it means? Or suddenly the calls stopped working after updating the firmware, although the Internet is still working? Perhaps the problem lies in the disabled VoLTE technology, a standard that dramatically changes the quality of voice communication. In this article, we will understand why Xiaomi VoLTE can not work even with 4G support, how to turn it on correctly and what “pitfalls” await users when setting up.

Voice over LTE technology allows you to make calls over your mobile network without switching to outdated 2G/3G standards. That means your Redmi Note 12 or POCO X5 will keep the communication more stable and the voice of the interlocutor will sound clearer. But it's not that simple: carriers, regional restrictions and even MIUI firmware can complicate the process. Let's figure out how to avoid typical errors and make VoLTE work at full capacity.

What is VoLTE and why is it needed in Xiaomi?

VoLTE (Voice over LTE) — This is a technology that allows voice calls to be transmitted over a network. 4G LTE, Not through traditional networks. 2G or 3G. The main advantage is that the quality of communication becomes comparable to the IP-Telephony (like Skype or WhatsApp) but without the need to connect to Wi-Fi.

On Xiaomi smartphones (including Redmi, POCO and Black Shark), VoLTE solves several key issues:

• ⚡ Instant connection – no delay in dialing (unlike the phone) 2G, where the connection could take up to 5 seconds).
• 📶 Stable signal – even in areas with weak coverage 4G The call will not stop because the network will not switch to the 3G/2G.
• 🔊 Clean sound – technology uses codec AMR-WB, which transmits voice in the range up to 7 kHz (vs. 3.4 kHz in the 2G).
• 📱 Parallel work – you can talk and use the mobile Internet at the same time (for example, Google information while talking).

There are nuances, however: Not all carriers support VoLTE in your region, for example, and some Xiaomi models (especially Released until 2018) may require manual tuning, and the technology consumes slightly more battery than regular calls, but the difference is minimal against the background of the benefits.

How to check if your Xiaomi VoLTE supports

Before you set up VoLTE, make sure your Xiaomi smartphone supports this technology at all. Here are 3 ways to check:

1. Official list of supported models

Xiaomi publishes data on VoLTE support for each device, for example, all Redmi Note models starting with the Note. 7 (2019 year), POCO F1 and newer and flagship series Mi 9/10/11/12/13/14 They have hardware support. And here's Redmi. 5A or Mi A1 — no.

2. Verification through MIUI settings

Go to:

Settings → SIM- Maps and Mobile Networks → [Select SIM] → Enable VoLTE

If there is no VoLTE, your model does not support the technology at the software level (even if the hardware can).

3. Verification through the engineering menu

For advanced users:

1. Open the Phone app and dial ##4636##.
2. Select Phone Information.
3. Check out the VoLTE provisioned bar – if there is Yes, there is support.

Step-by-step: how to enable VoLTE on Xiaomi

If your smartphone supports VoLTE but the technology is disabled, follow this instruction. Please note that the process may vary depending on the version of MIUI (Global, China, EU) and the phone model.

Step 1. Update the firmware

VoLTE may not work on older versions of MIUI. Check for updates:

Settings → About the phone → System update

If a new version is available, install it.

Step 2: Activate VoLTE in the settings

1. Go to Settings. → SIM-maps and mobile networks.

2. Choose yours. SIM-card (if there are several).

3. Find the switch Enable VoLTE and activate it.

4. Reboot the phone.

Update MIUI last-minute|Check VoLTE support for your model|Make sure that SIM-The card supports VoLTE (to clarify with the operator)|Activate the switch in the settings|Reboot the phone-->

Step 3: Set up APN (if VoLTE doesn't appear)

Sometimes you need to manually configure APNs.

1. Go to Settings. → SIM-maps and mobile networks → [Yours. SIM] → Access points (APN).
2. Click on the current APN profile and check that the default,supl,ims (ims parameter is important for VoLTE) field is indicated in the APN Type field.
3. If you don’t have an option, create a new APN with these settings (the data for your carrier can be found on their website).

⚠️ Note: On some firmware (e.g. Xiaomi.EU), VoLTE may not work due to lack of certificates IMS. In this case, only reflashing to the official global version will help. MIUI.

Table: Compatibility of VoLTE on popular Xiaomi models

If your model is not in the table, check the support on the Xiaomi VoLTE website or check with the operator. for example, Tele2 publishes a list of compatible devices for VoLTE on its support page.

Why VoLTE doesn’t work for Xiaomi: Typical Problems and Solutions

Even if you've enabled VoLTE in your settings, the technology may not work, and here are the most common reasons and ways to address them:

1.The operator does not support VoLTE

Not all tariffs and regions have VoLTE coverage. For example, Yota and some virtual operators (like Tinkoff Mobile) do not support the technology. Solution: call the operator and check if VoLTE is available in your region.

2. SIM-map is not compatible

Old ones. SIM-Cards (issued before 2018) may not support IMS-The solution: replace SIM on the new in the cabin of the operator (free of charge).

3. Conflict with Dual SIM

Some models of Xiaomi VoLTE works only on the first SIM-card SIM1). Solution: change. SIM In some places or turn off the second card.

4. Failure in IMS settings

If VoLTE is turned on but calls don’t pass, reset your IMS settings:

Settings → Applications → Application Management → Three dots (⋮) → Show system → IMS Service → Storage → Clear data

Then restart the phone.

⚠️ Warning: On phones with a bootloader unlocked, VoLTE may not work due to lack of security certificates. MIUI lock-down.

💡

If the mobile Internet is lost after turning on VoLTE, check the APN settings. Sometimes VoLTE conflicts with the parameter Type APN = default,supl. Add to the end by comma ims (should turn default,supl,ims) and save.

VoLTE vs ViLTE vs VoNR: What’s the difference and what’s better

In addition to VoLTE, in the settings of Xiaomi you can find the abbreviations ViLTE and VoNR. Let's see what they mean and what is different:

VoLTE (Voice over LTE) – voice calls over 4G. The most common technology, works on most modern smartphones.

ViLTE (Video over LTE) – video calls over 4G without using third-party applications (for example, you can call with a video conferencing directly from the standard Phone application).

VoNR (Voice over New Radio) - Voice calls 5G. A more advanced version of VoLTE with even better sound quality and lower latency, currently available only in test areas (Moscow, St. Petersburg) on operators with a high-speed range. 5G-net.

On Xiaomi 5G-enabled smartphones (such as the Redmi K50 Pro or Xiaomi 13T), you can enable VoNR in the same settings as VoLTE.

• 📡 Stay in the coverage area 5G.
• 📱 Have an active SIM-support-card 5G (Not all tariffs are suitable).
• 🔄 Update the firmware to the latest version (VoNR requires) MIUI 13+).

How to turn off VoLTE on Xiaomi (and why you might need it)

While VoLTE offers many benefits, it is advisable to disable it in some cases:

• 🔋 Battery savings – if you rarely call, and VoLTE consumes an extra 5-10% charge.
• 📶 Problems with coverage in some regions 4G-The network is unstable and calls through 2G/3G pass more stable.
• 🛠️ Diagnostics of problems – if the sound in the calls is missing, disabling VoLTE will help to understand whether it is a problem.

How to disable VoLTE:

1. Go to Settings. → SIM-maps and mobile networks.
2. Choose yours. SIM-map.
3. Turn off the VoLTE switch.
4. Reboot the phone.

⚠️ Note: On some Xiaomi models (e.g, POCO F3) After disabling VoLTE, network icons may disappear, in which case resetting the network settings will help: → Memory and reset → Resetting network settings

💡

If VoLTE stopped calling at all after the VoLTE shutdown, check if 4G Only is activated in the network settings, in which case the phone will not be able to switch to 2G/3G for voice communication. Solution: set 4G/3G/2G (auto) mode.

FAQ: Frequent questions about VoLTE on Xiaomi