You’ve noticed the mysterious VoLTE sign in the status bar of your Xiaomi smartphone and wondered what it means: It may appear, disappear, or even disappear, even though the operator promises support. This article will take a look at Voice over LTE (voice over 4G) technology in detail, from how it works to turn-based customization on Redmi, POCO and Mi devices.
There's no arguing about the importance of VoLTE: it's not just a "chip" but a real improvement in call quality. But there's a nuance that not all carriers support the technology equally well, and some Xiaomi models need to turn it on manually, and we'll tell you how to check for VoLTE availability on your tariff, activate it in your settings, and what to do if the label never appears.
What is VoLTE and why is it important?
VoLTE (Voice over LTE) is a standard for voice transmission over a fourth generation (4G) network, as opposed to traditional 2G/3G calls. The main advantage is that voice is transmitted digitally as data, not as an analog signal.
- 🎙️ Clean sound without noise and interference, as when talking on the IP-Telephony (for example, WhatsApp or Skype).
- ⚡ Instant connection – no delay in dialing, like in old networks.
- 📶 Stable signal even in areas with weak coating 3G/2G (if 4G catches).
- 🔄 Smooth transition between VoLTE and Wi-Fi Calling (if the operator supports both standards).
But there is a downside: VoLTE requires support from the operator, smartphone and SIM card. If at least one link is not compatible, the inscription on the screen will not appear, and calls will go through old channels. For example, in Russia, VoLTE is actively developing MTS, Beeline and MegaFon, but the coverage is not everywhere the same.
What VoLTE looks like on the Xiaomi screen: display options
VoLTE can appear in different places on MIUI, depending on the model of the smartphone and the firmware version.
- 📱 In the status bar (near the network indicator): usually to the right of the icon 4G/5G. Example: 4G VoLTE or just VoLTE.
- 🔄 During a call: instead of the traditional "Call...", a VoLTE call or a call may be displayed. HD-call (for some operators).
- ⚙️ In the settings SIM-maps: if the technology is active, in the Settings menu → SIM-Maps and mobile networks will be a switch VoLTE.
Some models (such as Xiaomi 12T or POCO F5) may display an HD icon instead of text, which also indicates the use of VoLTE. If there is no label at all, this does not always mean that there is no support: perhaps the function is simply disabled in the settings.
Why does the word “Volte” appear and disappear?
Check VoLTE support on your Xiaomi
Before you set up VoLTE, make sure your smartphone and carrier support it. Here's a step-by-step checklist:
☑️ Verification of compatibility with VoLTE
1. Smartphone compatibility: Virtually all Xiaomi models support VoLTE after 2018, but there are exceptions: for example, some budget devices (for example, Redmi 9A) may not have this feature.
2. Operator support. Even if the smartphone supports VoLTE, the operator may not provide this service at your rate.
- 🌐 On the operator's website in the "Technology" or "Coverage" section".
- 📞 By phone hotline (for example *111# for MTS).
- 📄 In the personal account of the mobile application of the operator.
3. Firmware relevance. On some Xiaomi models (e.g. Redmi Note 10 Pro), VoLTE doesn't work on older versions of MIUI due to errors in the modem module. Updating to the latest firmware often solves the problem. To check the version, go to Settings → About Phone → MIUI version.
Step-by-step: how to enable VoLTE on Xiaomi
If all conditions are met but VoLTE is not activated, turn it on manually. Instructions are suitable for most models on MIUI 12/13/14:
- Open Settings and go to the section SIM-maps and mobile networks.
- Choose yours. SIM-card (if there are several).
- Tap on VoLTE Call (or VoLTE Call, Improved Calls – the name depends on the firmware version).
- Activate the switch. If there is no option, then VoLTE is not supported on your device or carrier.
On some models (e.g. POCO X3 Pro) the path may be different:
Settings → Connections and Sharing → Additional → Call by VoLTE💡
If VoLTE calls start to interrupt or the sound gets distorted after you turn on, try disabling the feature and contacting the operator – perhaps the network-side problem.
What if there's no VoLTE switch? Here are the possible causes and solutions:
| Problem. | Decision |
|---|---|
| Outdated firmware | Update MIUI via Settings → About Phone → System Update. |
| SIM-The card does not support VoLTE | Replace the card with a new one in the operator’s cabin (USIM required). |
| The operator has not activated the service | Send. USSD-request, *111*55# for MTS) or call support. |
| Regional restrictions | Check the coverage of VoLTE in your city on the operator map. |
VoLTE vs Wi-Fi Calling: What’s the difference and what’s better
Both technologies improve the quality of calls, but work differently:
- 📶 VoLTE uses a mobile network 4G/5G. The main advantage is stability in areas with good coverage.
- 📶 Wi-Fi Calling is a voice-over service over the Internet (Wi-Fi or mobile data), plus it works even when you don't have a network.
On Xiaomi smartphones, these features can be used together, for example, if you start a VoLTE call and then exit the 4G coverage area, the smartphone will automatically switch to Wi-Fi Calling (if the operator supports eSeMC - enhanced Single Radio Voice Call Continuity).
How to enable Wi-Fi Calling on Xiaomi:
- Go to Settings. → SIM-maps and mobile networks.
- Choose. SIM-map.
- Activate the Wi-Fi Calling option (or Wi-Fi Call).
💡
If your carrier supports both, it is recommended to enable them simultaneously, which ensures the highest quality of communication in any environment, from urban high-rises to rural areas.
Common VoLTE Problems on Xiaomi and Their Solutions
Even after you set up your VoLTE properly, you can still experience failures, and here are the typical situations and ways to fix them:
⚠️ Note: If the phone starts to run out quickly after activating VoLTE, check the power saving settings. Some modes (such as "Ultra-Economic") may conflict with the modem module, causing increased battery consumption.
- 🔇 No sound when VoLTE calls Check if "On the plane" or "Do not disturb" is activated. Also make sure the microphone is not physically silenced (for example, a case). If the problem remains, reset the network settings: Settings → SIM-maps and mobile networks → Resetting mobile network settings.
- 🔄 VoLTE spontaneously shuts down This may be due to battery saving. Open Settings → Battery and productivity → Manage battery consumption with apps and add the phone to the exclusion list.
- 📵 Some operators restrict VoLTE for calling short numbers (for example, for example, 112) Or long distance lines, in which case the call automatically switches to the 3G/2G.
If none of the solutions worked, try resetting the network settings to factory:
Settings → System and device → Additional → Resetting settings → Resetting mobile network settings⚠️ Note: Some Xiaomi models (e.g. Mi 11 Lite) may lose access to mobile internet after resetting the network settings. In this case, restart the smartphone or manually select the access point APN customized SIM-map.
VoLTE and 5G: compatibility and prospects
With the advent of 5G networks, VoLTE technology is not losing its relevance - it is evolving into VoNR (Voice over New Radio), which is analogous to VoLTE, but for fifth generations of networks. VoNR is currently only available in test areas (for example, in Moscow or St. Petersburg on MTS), but is already supported by Xiaomi flagships such as Xiaomi 13 Pro or POCO F4 GT.
If your smartphone is 5G compatible but VoNR doesn’t work, make sure to:
- 📡 Network settings have mode enabled 5G (Not just 4G).
- 🔧 The operator has activated VoNR support for your tariff (check in your personal account).
- 📱 Firmware MIUI Updated to the latest version (VoNR requires special modem drivers).
VoLTE and VoNR will coexist in the coming years: the first technology will remain in the future. 4G-The second will become the standard for 5G. If you are planning to upgrade your smartphone, pay attention to models with support SA-regime 5G (Standalone – They are guaranteed to be VoNR compatible.