Xiaomi and Redmi smartphone owners often notice a mysterious VoLTE sign in the status bar that can appear and disappear for no apparent reason. For many users, this becomes a cause for concern: whether the paid option turned on, whether the battery died faster, and what this acronym means at all. In fact, the appearance of this indicator indicates that your Xiaomi Redmi has moved to a more modern voice data standard.
The technology allows you to make calls directly over a 4G network (LTE), bypassing the need to switch to older standards like 3G or 2G. This provides significantly higher sound quality, faster connection and the ability to use mobile Internet at high speed during a conversation. In this article, we will discuss in detail how the function works, how it is activated on different versions of MIUI and solve possible problems with connection.
Understanding network protocols is important for the right setup of your device, and if you see this icon, it means that your carrier supports the technology and your smartphone has successfully registered with the next generation network, but not everything works automatically, and sometimes you need manual intervention in the settings of the system to ensure stable communication.
What is hidden behind the acronym VoLTE
VoLTE stands for Voice over LTE, which literally means Voice over LTE. In the past, fourth-generation networks (LTE) were used exclusively for packet data, meaning the Internet. Voice calls required the phone to switch to older, less-speed communication standards, such as 3G or even EDGE, which led to delays in establishing connections and reduced Internet speed during conversation.
With the introduction of VoLTE, voice has also become transmitted as digital data packets, but with high priority on the network, allowing carriers to provide HD Voice, where sound is transmitted over a wide frequency range, resulting in the person hearing you as clearly as if you were in the same room, and background noise is almost completely cut off by noise reduction algorithms.
It is important to note that this feature requires support from three components: the smartphone itself, SIM-If at least one link in the chain does not meet the requirements, the icon will not appear and the phone will work as usual. Modern Xiaomi models have long been equipped with the necessary modules, so the question most often lies in the settings or the tariff plan.
- 📶 High quality sound: Using wide range codecs makes voice natural and clean.
- ⚡ Instant connection: Call establishment time is reduced to 1-2 second-on 5-7 second-in-second 3G.
- 🌐 Simultaneous work: Internet 4G Continues to work at full speed even during an active conversation.
Benefits of using technology on Xiaomi smartphones
The switch to LTE voice calls has tangible benefits in everyday smartphone use, particularly in terms of communication quality. In noisy places like the street, the traffic center, or the mall, HD Voice algorithms can better recognize speech, reducing the need to ask questions. For business people, it's a critical parameter for effective negotiation.
The second important aspect is the battery saving, although it might seem like the voice transmission is through the battery. 4G It uses more energy, in practice, it's the opposite. A smartphone doesn't have to jump between communication standards all the time (LTE ↔ 3G ↔ LTE) Incoming or outgoing calls: A stable connection to a single tower in VoLTE mode allows the communication module to operate in a more energy-efficient mode.
⚠️ Attention: The quality of communication depends on the network coverage 4G. If you are in the area of insecure reception LTE, The phone may try to hold the signal, which will lead to increased battery consumption, in which case the icon may flash or disappear.
Also worth mentioning is the possibility of high-quality video calls through a native phone book, although in Russia and the CIS this feature is still poorly implemented and depends on the specific operator. The main advantage for Xiaomi Redmi users is the ability to not interrupt the download of files or online games during an incoming call, which is impossible in 3G networks without VoLTE technology.
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If you use your navigator a lot when you're making calls, turning on VoLTE is critical. GPS-The card can “rise” or be updated with a large delay at the time of connection with the interlocutor.
How to enable VoLTE on Xiaomi Redmi: step-by-step instructions
Activation of the feature on Xiaomi devices usually occurs automatically when installed SIM-However, in some cases, especially after flashing or changing the region, the settings may be confused.
First, you need to go to the settings section. SIM-The path may vary slightly depending on the version of the shell. MIUI You can go to HyperOS, but the logic is the same. Open Settings, then select a paragraph. SIM-Maps and mobile networks. You need to choose active networks. SIM-map for which you want to include the function.
In the menu that opens, find a switch that says Use VoLTE or LTE Calls. If it doesn't, it may be hidden in the engineering menu or it will turn on automatically if you have operator support. Make sure that the mobile network settings select the network type Preferably 4G (LTE).
☑️ Verification of VoLTE settings
If the standard methods fail to enable the option, you can use the engineering menu. To do this, dial the code # # #86583## in the Phone application. The message "VoLTE Carrier check was disabled" should appear on the screen, which means that the software locks the operator's check was disabled, then the on item can appear in the normal settings menu.
List of supported operators in Russia and CIS
Not all mobile operators provide VoLTE service for free or even in your region. In Russia, major market players have already implemented this technology, but conditions may vary. SIM-The map wasn't too old.
Below is a table with up-to-date information on the support of the technology by large operators. The data may change, so for accurate information, it is better to visit the official website of your provider or call support.
| Operator. | Support for VoLTE | Activation needed. | Payment |
|---|---|---|---|
| MTS | Yes (in most regions) | Automatically. | Free (minutes at the fare) |
| MegaFon | Yes. | Often required team | Free (minutes at the fare) |
| Beeline | Yes. | Automatically. | Free (minutes at the fare) |
| Tele2 | Yes. | Automatically. | Free (minutes at the fare) |
It's important to understand that even if the operator claims support, in certain buildings with thick walls or in remote areas, the 4G signal may not break through, in which case the phone will automatically switch to 3G, and the VoLTE icon will disappear from the status bar. This is normal behavior of the device, ensuring continuity of communication.
Secret. USSD-activation
Why the VoLTE icon is missing and how to fix the error
When the VoLTE icon suddenly disappears, it is a common problem, most often due to temporary disruptions in the operator’s network or updating configuration files on the provider’s side, and also the reason can be the exit of the 4G coverage area, for example, when entering the subway or traveling outside the city.
If you're in a city where the coverage is stable but the icon is gone, try rebooting your smartphone, which will force the communications module to re-register and get the current settings, and in some cases, Flight mode helps: turn it on for 10-15 seconds, and then turn it off.
Another reason may be the incorrect work itself. SIM-If it's been in use for many years, its contacts could have oxidized, or the card's memory could have been damaged. SIM-If that didn't work, you might need a replacement. SIM-cards for a new one in the operator’s cabin.
⚠️ Warning: Do not attempt to edit system files or use third-party applications to “force” VoLTE unless you are an experienced user, this can lead to complete loss of communication and inability to make even emergency calls.
Also check if your Xiaomi Redmi firmware has updated. MIUI You reset some network settings. Go to the settings menu and make sure that the VoLTE switch is still active. SIM-maps, perhaps the matter in the hardware malfunction of the antenna module.
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The loss of the VoLTE icon in 90% of cases is associated with a temporary absence of a 4G signal or reset network settings after a system update.
The impact of technology on battery consumption and Internet speed
Many users mistakenly believe that constant 4G and voice over LTE significantly deplete the battery. In practice, modern modems installed in Xiaomi are optimized for LTE networks. As mentioned earlier, the lack of constant switching between standards (3G/4G) saves more power than consumes it.
In terms of internet speed, the impact is extremely positive: In older networks, when you call in, the phone dropped into 3G, and the speed of page loading or navigation dropped dramatically to 384 kbps or lower. With VoLTE, your 4G channel remains open and fully functional. You can download files, watch high-resolution videos or play online games without interrupting the connection.
However, if the 4G signal is very weak (1 division scale), the communication module will work at its limit, maintaining the connection. In such rare cases, battery consumption can indeed increase. But in a confident reception, the difference in autonomy between 3G only and 4G + VoLTE mode is almost invisible to the user.
- 🔋 Stability: Fewer switching cycles of communication standards prolong battery life.
- 🚀 Speed: The Internet doesn’t “cut” during a conversation, staying level LTE.
- 📡 Efficiency: Modern codec compresses voice more efficiently using fewer network resources.