VoLTE icon on Xiaomi: decryption, configuration and problem solving

Xiaomi smartphone users often notice the appearance of a new icon in the status bar, which looks like a rectangle with the words VoLTE. This symbol can appear suddenly after an operating system update. MIUI shift SIM-This is not a mistake, it's not a sign of failure, it's actually a sign of advanced fourth-generation voice technology.

The main function of this technology is to transmit voice traffic as a data stream, similar to the way messenger messages are transmitted, but with the highest priority and quality. High Definition Voice provides crystal clear sound, depriving subscribers of the characteristic hissing and hum characteristic of the old GSM standards. For Xiaomi owners, this means that you can talk on the phone at the same time and enjoy fast 4G Internet, which was impossible on older networks.

In this article, we will discuss in detail why this icon appears on your device, how to force the function to activate if it is hidden by the operator, and what to do if the sound or Internet is lost after turning on. Understanding the principles of Voice over LTE will help you to squeeze the maximum out of the capabilities of your smartphone and tariff plan.

Technological essence of the VoLTE icon in the status bar

VoLTE stands for Voice over Long Term Evolution. In the context of the Xiaomi and Redmi ecosystem, this icon signals that the device has successfully registered with the operator’s network using the IP Multimedia Subsystem (IMS) protocol, which means that your voice is transmitted as data packets over a 4G network, bypassing the need to switch to outdated 2G or 3G standards during an incoming or outgoing call.

In the past, when a call came in, the phone had to force downgrade to 3G or even EDGE, which caused the Internet connection to break down. With the introduction of IMS and the appearance of the corresponding icon on the Smartphone screen, this drawback was eliminated. Now the Qualcomm or MediaTek communication module installed in your gadget is able to process voice and Internet traffic in parallel using the same frequency.

It's important to understand that the icon itself is just a visual confirmation of a successful login. The real quality of the connection depends on many factors, including the coverage of your carrier's base stations and the technical support of the technology on his part. If the VoLTE icon is burning, but the interlocutors complain about interruptions, the problem may lie not in the settings of the phone, but in the congestion of the cell tower.

⚠️ Note: The presence of the icon does not guarantee the operation of the function in roaming. When traveling abroad, the service may stop working even if the indicator on the screen is saved, as affiliate networks may not be supported IMS-Profiles of your home operator.

Key Benefits of Use HD-call-up

The move to new communication standards gives Xiaomi users a number of undeniable benefits that significantly improve the user experience, primarily the speed of establishing a connection. The wait time for beeps is reduced to 1-2 seconds, whereas in 3G networks this process could take up to 10 seconds, this is especially noticeable when dialing emergency services or important business contacts.

The second important aspect is energy efficiency: Since the Redmi Note or the flagship Mi series does not need to constantly switch between 4G and 3G modes during a conversation, battery consumption is reduced. The modem processor operates in a stable mode, without expending excess energy to adjust frequencies and re-register on the network after the call is completed.

• 🎙️ Sound quality: High-resolution codec support allows you to transmit the full spectrum of the human voice, making speech more natural and legible even in noisy places.
• 🌐 Simultaneous operation: Ability to download files, navigate maps or play online games without interrupting the Internet connection during a conversation.
• 📶 Stability of coverage: In places where the signal 3G The network is either missing or very weak. 4G Voice-enabled connections often provide a more secure connection.

In addition, the technology allows you to implement the function of video calls natively on the phone, without the use of third-party applications like Skype or WhatsApp, the quality of the video stream in this case is regulated by the operator’s network, ensuring a stable picture even with imperfect reception.

Checking the compatibility of the device and SIM-card

Before you look for settings in the menu, make sure your hardware is physically capable of supporting this feature. Not all Xiaomi models released a few years ago have the necessary antenna modules or software support for operator profiles in their arsenal. First, you need to check if your support is SIM-service-card.

Most of the major operators, such as MTS, Beeline, Megafon and Tele2, They have long since moved to standards. 4G, but SIM-cards issued by more 5-7 Years ago, the profile may not be available. USIM. In that case, the badge HD Or VoLTE won't come out, even if all the switches are active on the phone's menu. SIM-maps in the communication salon for new with support 4G.

It's also important to check the settings of the smartphone itself. MIUI Or the new HyperOS, it's a separate item on the mobile menu, and if you're using a dual-sim phone, remember that the technology can only work on one. SIM-the card simultaneously, usually on the one selected for the transfer of mobile data.

Global versions of Xiaomi Global smartphones may have hidden settings for certain carriers that are active by default in Europe or Asia but are blocked in versions for other markets, in which cases manual activation through an engineering menu or special codes may be required, which we will discuss below.

Step-by-step instruction for inclusion of the function

Activation of the technology on Xiaomi devices usually occurs automatically when you install compatible devices. SIM-However, if the icon does not appear, you need to perform a number of actions manually. First, make sure that the phone is enabled mobile data, since without the Internet registration in the mobile phone is not available. IMS-net impossible.

Go to the main settings of the device, select the item «SIM-Maps and mobile networks. Here you need to select a specific SIM card if there are two. Find the "Use VoLTE" or "Calls through" switch. LTE» In some firmware, this item may be hidden if the system has not automatically identified the operator.

Path to Settings: → SIM- Maps and Mobile Networks → [Your SIM] → Use VoLTE

If the standard way to enable the function fails, you can try to activate the hidden engineering menu. To do this, dial the combination ##86583## in the Phone application. The screen should show the message "VoLTE carrier check was DISABLED" (which paradoxically means turning on the check and the item appears in the menu) or "ENABLED".

• 📱 Step 1: Open the settings menu and go to the section SIM-map.
• 🔌 Step 2: Make sure that the slider "Include" 4G» active.
• ⚙️ Step 3: Find and enable the option “Use VoLTE».
• 🔄 Step 4: Reset the device to apply the changes.

⚠️ Note: Use of engineering codes can cause the network to be unstable if you change the wrong settings.Write down the source values before making any changes to hidden menus.

Operator support table and icon statuses

Different carriers use different indicators and requirements to activate the service. Below is a table that will help you navigate what a particular status on your Xiaomi screen means depending on the provider.

As you can see from the table, most of the major players in the market have already fully integrated the technology into their networks, but even with full support, different characters can be displayed on the screen, for example, some operators prefer the HD icon, while others leave a standard VoLTE label. This does not affect the quality of communication, but only indicates the branding of the service.

In the case of Yota and virtual operators (MVNO), If you're using a corporate SIM card, the network administrator may have blocked the use of the base station and region. IMS-Profiles to save traffic or for security reasons.

Solution: The sound or the internet is gone

One of the common problems after activation of the function is when the Internet disappears during a conversation or, conversely, when the Internet is turned on, calls do not go away, this may indicate a conflict of APN settings (access points) or a modem malfunction. Try resetting the mobile network settings to factory ones.

To do this, go to Settings → Connection & Sharing → Reset Wi-Fi, mobile networks, and Bluetooth. Note that this action will remove saved passwords from Wi-Fi networks and associated Bluetooth devices, but return network settings to their original state, which often solves the problem of registering with IMS.

If the problem persists, check if traffic saving mode or Smart Mode is enabled in the settings. SIM-Sometimes aggressive battery optimization in the MIUI It blocks background processes necessary to maintain a permanent connection to the operator's servers. Add the Phone app and system services to the power saving exceptions.

Frequently Asked Questions (FAQ)

💡

Stable VoLTE operation requires three components to be compatible: SIM-map, operator tariff and smartphone settings. If one of the items falls out, the function will not work.

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If you’re often in the area of insecure reception, try temporarily disabling VoLTE.In some cases, good old-fashioned 3G provides a more stable voice signal than congested 4G.