What does VoLTE mean on Xiaomi: a complete guide to the game HD-call

Owners of modern smartphones Xiaomi, Redmi and POCO often notice on the screen a small but important acronym VoLTE. This feature becomes the standard of communication quality, but not all users understand its real value and advantages over conventional voice calls. Many simply ignore the icon, relying on automatic operator settings, which sometimes leads to a decrease in the quality of communication or inability to use the Internet during a conversation.

VoLTE (Voice over LTE) technology is radically changing the way voice is transmitted, turning it into a 4G digital data format. Unlike the old standards, where the phone switched to 3G or 2G for conversation, it only uses high-speed networking. This provides crystal clear sound and instant connection, which is especially true for owners of Xiaomi devices with their advanced antenna modules.

In this article, we will take a closer look at how this technology works, why it may not be available on your device, and what steps you need to take to activate it, learn about the hidden capabilities of the engineering menu and understand why some carriers require manual access points to work properly.

Technological essence of VoLTE and difference from traditional communication

To understand how it works, you need to look at the history of mobile networks. CSFB (Circuit Switched Fallback, which when incoming or outgoing call forced to throw the smartphone from the fast 4G slower 3G or 2G. It was creating a delay in 2-5 The second before the beeps started, and deprived the user of access to the Internet during the conversation. VoLTE technology bridges this gap by allowing voice to be transmitted as a normal stream of data through the Internet. IP-protocol.

On Xiaomi devices, this feature is closely linked to base station mod and MIUI or HyperOS software. The smartphone does not break the connection to the 4G tower, but simply reserves part of the channel for voice packets. This allows you to simultaneously download files, watch high-resolution videos and talk without losing download speed.

A key advantage is the AMR-WB (Adaptive Multi-Rate Wideband) codec, often referred to as HD Voice. It transmits frequencies up to 7,000 Hz, whereas older networks were limited to 3400 Hz. The human ear perceives this as a more natural, surround sound, in which it is easier to distinguish between the voice and background noises.

• 📶 Instant connection: dialing occurs almost without delay, as no reconnection to another frequency is required.
• 🌐 Simultaneous work: the Internet 4G/5G Continues to work at full speed during the conversation.
• 🔋 Power efficiency: Xiaomi smartphone does not need to waste energy on constant search and switching between modes 2G/3G/4G.

Importantly, the technology needs support from all parts of the chain: the SIM card, the tariff plan, the operator’s base station, and the phone itself, and if at least one element does not support the standard, the connection will be established using the old protocol.

How to check and enable VoLTE on Xiaomi smartphones

Activation of the feature on Xiaomi devices usually occurs automatically after installing the SIM card, if the operator and region support the technology. However, in some cases, especially when using custom firmware or SIM cards from other regions, manual intervention is required. The first step should always be to check the basic settings in the device menu.

Go to the Settings section, then select SIM-Find the item corresponding to your SIM card and make sure that the Use VoLTE switch is active. If there is no such item, this may mean that the function is hidden software or the operator is not added to the whitelist of the system.

Sometimes the icon doesn't appear because of a network logging failure, and in this case, a simple but effective method helps: turn on Flight Mode for 10-15 seconds, and then turn it off, which will force Xiaomi's modem to re-enter the network and request available services from the operator.

⚠️ Note: If after the flight mode is turned on, the VoLTE icon never appeared, and there is no corresponding switch in the settings, it is possible that your operator requires manual adjustment of the access point. APN activate.

In the rare cases where standard methods fail, users resort to the use of an engineering menu, which requires caution, as changing hidden parameters can affect the stability of the radio module. To access the hidden menu, the code # #86583## is often used, which forcibly includes a VoLTE check.

Technology comparison: VoLTE vs 3G and VoWiFi

To get a good idea of the benefits, it’s worth comparing VoLTE to previous technologies and alternatives, the main difference being the speed of connection and the quality of the audio stream being transmitted. While 3G provides acceptable quality, it cannot compete with LTE bandwidth.

VoWiFi (Voice over WiFi) technology is particularly noteworthy, and works on a similar principle to VoLTE, transmitting voice as a data packet, but using a Wi-Fi hotspot rather than a cell tower. On Xiaomi smartphones, the two technologies often work together: if the LTE signal is weak, the phone can switch to Wi-Fi to continue the conversation without breaking.

Below is a table showing the key differences between voice technologies:

Using VoLTE on Xiaomi also opens up the possibility of making high-quality video calls through a native phone book, without having to run third-party apps like WhatsApp or Telegram, although the popularity of this particular feature remains low.

Compatibility of operators and regions

One of the most common problems Xiaomi owners have is the lack of a VoLTE icon when using certain carriers' SIM cards.This is because MIUI has a built-in list of carriers for which the feature is unlocked by default. If your carrier is not on this list, the switch can be hidden.

Global versions of smartphones may not have profiles for some local carriers, and in this situation, the phone technically supports the technology but software blocks its activation, a situation that users often encounter when buying devices intended for the Chinese market or changing their region of use.

To solve this problem, there is an engineering menu activation method that is more secure than installing third-party modified applications. ##86583## disables operator verification, then a VoLTE switch should appear in the settings. To return to factory restrictions, the code #86583## (re-introduction) or ##4636## is used.

⚠️ Note: The use of engineering codes on new versions of HyperOS may be limited, in which case standard code entry methods will not work, and you will need to use special applications to activate hidden menus.

It is also worth considering that some carriers require the device to be registered on their network via IMEI. If you have changed your phone but the SIM card remains old, the service may not activate automatically, in which case you need to contact the operator's support team to update the information about the device.

The impact of VoLTE on the quality of communication and Internet speed

The impact of the technology on user experience is hard to overstate. Beyond the obvious improvement in sound, VoLTE solves the problem of network failures in buildings with thick walls, where 3G signal can be unstable, and 4G breaks through better due to other frequencies. Xiaomi smartphones with their quality Qualcomm modems or MediaTek demonstrate excellent results of retention of communication.

The speed of the internet in active conversation remains the same: you can play online games with low ping, watch streaming video in 4K, or download large files while talking. On 3G networks, speeds often fell to a minimum (EDGE), making the use of instant messengers impossible.

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If you are talking to the Internet speed drops 3G, Check if you are in the settings. SIM-card limitation “Only 3G/2G". Make sure you select the network type "Preferred" 4G (LTE)".

However, it is worth remembering traffic consumption: Voice calls over LTE consume Internet traffic, but operators usually do not charge it separately if you have an appropriate tariff plan connected, otherwise minutes can be deducted from the packet, rather than from voice resources.

Frequently Asked Questions (FAQ)

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VoLTE on Xiaomi is not just an icon in a status bar, but a communication quality standard that provides instant dialing, no Internet breaks and crystal clear sound comparable to personal communication.