What the VoLTE icon on Xiaomi Redmi phone means: the full guide

The appearance of an obscure label or icon in the status bar of a smartphone is often puzzling for users, especially when it happens on new devices. VoLTE is one of those acronyms that can be seen on the Xiaomi Redmi screen immediately after switching on the SIM card or updating the firmware. This indicator indicates that your gadget has moved to voice mode over a high-speed fourth-generation network, providing crystal clear sound and instant connection.

Many owners of Redmi Note or Redmi 9, 10, 11, 12 series devices are wondering if they need it and how to manage it. Unlike the old communication standards, when the phone was forced to switch to 2G or 3G to talk, modern technology allows you to stay in the 4G LTE coverage even while you are talking, which opens up the possibility of simultaneously talking and using fast Internet without delay.

In this article, we will discuss in detail why this mode is needed, how to activate it on Xiaomi smartphones with a shell. MIUI You can use HyperOS, and what to do if the icon is on, but the calls don't go through. IP-protocol and you can optimize your device settings for maximum communication comfort.

VoLTE technology: how it works and why it is necessary

VoLTE stands for Voice over LTE, which literally translates as Voice over LTE. The essence of the technology is to transfer voice traffic not through traditional switching channels, but in the form of data packets, just like messages are transmitted in messengers or web pages. Xiaomi Redmi uses a modem that is able to prioritize voice packets, ensuring their rapid delivery even when the network is congested.

The main advantage is the speed of the connection: when dialing in VoLTE mode, the beeps begin almost instantly, whereas in 2G/3G networks the wait could last for several seconds. In addition, the sound quality is significantly higher, maintaining a frequency range that makes the voice of the interlocutor more natural and voluminous, eliminating the characteristic “telephone” echo.

⚠️ Note: VoLTE uses packet data traffic, but most operators do not charge this traffic in megabytes, including it in packet minutes. However, in roaming, the situation may be different, so check with your provider.

It is important to note that the function requires support from all participants in the process: a smartphone, SIM-If at least one element of the chain does not meet the requirements, the Redmi phone will automatically switch to standard call mode, and the icon will disappear.

How to Enable and Configure VoLTE on Xiaomi Redmi

Activation of the function on Xiaomi devices usually occurs automatically if the operator supports the technology and in the case of the operator. SIM-But in some cases, especially on global firmware versions, it's set up accordingly. MIUI, Users have to enable the option manually through the engineering menu or standard settings.

First, check the basic network settings. Go to the Settings menu, select a paragraph. SIM-Next, click on the SIM card you plan to use for calls, and find the Use VoLTE switch. If it's active, the icon should appear at the top of the status bar.

If there is no standard switch, you can try activating the function through the hidden engineering menu. Open the Phone app and dial ##86583##. The message "VoLTE Carrier check was DISABLED" should appear on the screen, which means removing the restriction on checking the operator, then the desired switch can appear in the network settings.

• 📶 Make sure that the preferred network type is selected. LTE.
• 📱 Check if your Redmi firmware is up to the latest version.
• 🔌 Restart the device after making changes to the settings.
• 📞 Make sure that the VoLTE service is connected on the operator side (sending is often required). USSD-request).

⚠️ Note: Entering commands into the engineering menu can change the behavior of the radio module. If after activation of VoLTE, the sound is lost or the network stops catching, return the setting by dialing the same command, or reset the network settings.

Why the VoLTE icon flashes or disappears

When a VoLTE indicator appears, disappears, or flashes, it indicates a connection instability with the fourth generation network, which can occur when you move between coverage areas of different towers or enter a building with thick walls, where the LTE signal fades.

Another reason could be base station congestion: During peak hours, when many subscribers are simultaneously using the Internet, the operator may temporarily limit the ability to install voice calls over LTE, switching Xiaomi subscribers to 3G to ensure the stability of communication, in which case the icon disappears, but the calls continue to work.

It is also worth considering the state of SIM-Older SIMs that have been in use for years may not support the new encryption standards and protocols required for VoLTE.If your Redmi is new and the SIM card is released 5-7 It makes sense to replace it in the cabin of the operator USIM.

💡

If the VoLTE icon goes missing in certain places, try manually switching the network type to "LTE Only" in the engineering menu for diagnosis. If the connection goes completely missing, the operator coverage problem in this area.

Comparison of voice transmission technologies

To better understand the difference between modes of operation, it is useful to compare their main characteristics. Traditional 2G/3G calls use circuit switching, allocating a separate line for each subscriber, which inefficiently uses network resources. Modern methods such as VoLTE and Wi-Fi Calling use batch data transmission.

Below is a table showing the key differences between the technologies supported by Xiaomi smartphones:

The table shows that VoLTE is the most balanced mobile solution, combining high quality and data usability, but Wi-Fi Calling remains indispensable in places where there is no cellular signal, but there is access to a wireless network.

Impact on battery charge and traffic consumption

There is a common myth that VoLTE drains the battery much faster.In fact, constant network search and switching between 2G/3G/4G consumes much more energy than staying on a stable LTE connection. If you are in a confident reception zone, VoLTE mode even saves battery power for your Redmi, since the radio module runs in stable mode without power surges.

As for traffic, voice packets are very small, and one minute of high-quality conversation takes only about 0.5 to 1 MB of data, which telecom operators understand perfectly well, and they don't typically write off those megabytes from the main Internet packet, but count them as normal minutes of conversation.

⚠️ Note: When using VoLTE in international roaming without special tariff plans, minute-by-minute charging at high rates can begin, and Internet traffic can be counted separately.

If you want to maximize Xiaomi’s lifetime from a single charge in conditions of very weak signal, sometimes it makes sense to temporarily disable VoLTE and switch to 3G, since in the zone of the “borderline” LTE signal, the phone spends a lot of energy maintaining the connection.

💡

In the 4G confident reception zone, VoLTE is more economical for the battery than the constant jumps between 3G and 4G, and provides better communication quality.

Solution: there is a badge, but calls are not coming

Users sometimes encounter a situation where the VoLTE icon is on the Xiaomi screen, but when you try to call, the call is reset or not installed, most often this indicates a conflict of settings between the operator profile in the phone and the settings on the network side.

The first step is to update the configuration of the access points (APN). Go to the mobile network settings, select your own SIM-map and press Access Points (APN). From the menu, select Reset to the original settings, which will cause the phone to re-query the current settings from the operator.

If the APN reset didn't work, check to see if Traffic Savings or Background Data Limitation is activated for system services. Sometimes aggressive MIUI energy saving settings block the voice service. Add operator services to exceptions or remove restrictions.

• 🔄 Completely reset your network settings (not data!) through the Recovery Menu.
• 📲 Delete the operator profile if it was manually installed earlier.
• 📞 Contact the operator support to check service activity on the room.
• 📲 Try to rearrange. SIM-card.