HD-Xiaomi phone call: what it is, how it works and how to turn on

Have you ever noticed the inscription «HD» or «HD Voice while on the phone on your Xiaomi? or maybe in the communication settings you came across a mysterious option Volte HD If so, you've come across one of the most useful, but often underrated, features of today's smartphones: technology. HD-challenge.

In this article we will discuss in detail what is HD-A call to Xiaomi, how it differs from a regular voice call, what benefits the user has, and most importantly, how to set it up correctly on your device. We will also analyze which Xiaomi models support this feature, why it might not work even on compatible phones, and give practical tips to fix typical issues.

If you're tired of poor hearing, intermittent communication, or just want to get the best sound quality you can when you're talking, this is for you. HD-call, but did not notice the difference, we explain why the effect depends not only on your phone, but also on the operator, and even on the smartphone model of the interlocutor.

What is it? HD-Call and how it works for Xiaomi

HD-call HD Voice, VoLTE HD) — This is voice transmission technology on networks. 4G LTE and 5G, It provides significantly higher sound quality than traditional voice calls on networks. 2G/3G. Unlike standard calls, where the voice is compressed to 8–16 qbit/s (which often leads to distortion and noise), HD-call-ups use codec AMR-WB (Adaptive Multi-Rate Wideband with bitrate to 24 qbit/s and extended frequency ranges from 50 Hz 7 kHz 300–3400 Hz in regular calls).

Simply put, the difference between HD-Call and call are the same as between music in the format MP3 128 kbit/s and FLAC. Not only do you hear better, you hear a more natural, surround sound, without the characteristic "telephone" muting, but you notice a particularly noticeable improvement in the following situations:

• 🎤 The voice of the interlocutor sounds clearer, without a “metal” hue.
• 🌊 Background noises (wind, street hum) are transmitted more realistically, but are better suppressed.
• 🎵 Music or sounds (for example, if the interlocutor plays a song through a speaker) are played with less distortion.
• 🔊 The volume can be reduced, as the sound is more “clean” and does not require amplification.

It is important to understand that HD-Xiaomi calls (as well as other smartphones) only work if a few conditions are met:

⚠️ Warning: If you or your partner have VoLTE disabled (voice via voice) LTE), HD-Calls won't work even if the feature is enabled in the settings, which is one of the most common reasons why users don't notice the difference after activation. HD Voice.

Differences HD-Calls from VoLTE, VoWiFi and standard calls

Many people confuse HD-Calls with other voice technologies such as VoLTE, VoWiFi or even ViLTE (video calls via video) LTE). Discuss the key differences in the table:

The table shows that HD-The call is an improved version of VoLTE, not a separate technology:

1. Activated VoLTE on both phones.
2. Support AMR-WB or more modern codecs (for example, EVS) communicationsman.
3. Compatible smartphones (not all Xiaomi models support) HD Voice, even if it supports VoLTE).

Interesting fact: some operators (for example, MTS or Beeline) automatically switch HD-call to standard mode if the network is overloaded, so quality can float even when the function is on.

What Xiaomi models support HD-challenge

Not all Xiaomi smartphones are capable of working with HD Voice, even if it supports VoLTE, here are the key criteria for compatibility:

• 📱 Processor: Qualcomm Snapdragon (600, 700, 800) and MediaTek Dimensity (1000, 1200 and later) are more likely to support phones HD-Challenges than budget chips.
• 📡 Modem: Modem with VoLTE support is required HD (For example, Snapdragon X55/X60 or MediaTek M70).
• 🔄 Version. MIUI: On older versions of firmware (below) MIUI 12) the function may not be present even on a compatible iron.
• 📶 Region: Some models (e.g. for the Chinese market) may not support HD Voice in Russian networks.

Below is a list of popular Xiaomi models that support HD-calls in most regions (provided that the firmware is up-to-date and the operator is compatible):

How to check if your Xiaomi supports you HD-challenge?

Go to Settings. → SIM-maps and mobile networks → [yours SIM] → Challenges

Find the VoLTE points and HD-challenge (or Volte) HD)

If there are no options, the model does not support

Try to call another phone with HD Voice (the icon should appear on the screen) HD)

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⚠️ Note: Some models (e.g. Redmi) 9A or POCO M4 Pro) the VoLTE option may be displayed in the settings, but HD-It's not going to be a call, which means that the phone supports the voice through the phone. 4G, but not broadband.

How to turn it on HD-Calls to Xiaomi: step-by-step instructions

If your smartphone supports the function, you can activate it in a few steps. MIUI 12-14 (on older versions, the menu may differ):

1. Open Settings and go to the section SIM-maps and mobile networks.
2. Choose yours. SIM-card (if there are several).
3. Slip on VoLTE Call (or Voice Calls).
4. Activate the VoLTE switch (if it is turned off).
5. A paragraph should appear below. HD-challenge (or Volte) HD, High-quality calls – turn it on.
6. Restart your phone (sometimes changes only apply after the reboot).

After turning on when making a call, an icon should appear on the screen. HD (If you don't have one, check it:

• 🔄 Firmware Updates: Go to Settings → The phone. → Updating the system.
• 📶 Network coverage: HD-Calls only work in the area 4G/5G your operator.
• 📞 Interviewer: It should also be enabled VoLTE and supported HD Voice.

If you're optional HD-There are no calls on the menu, but there is VoLTE, try it:

On some models (e.g. Xiaomi) 13T) after-in HD-caller may miss the badge 4G+ It's normal -- the phone switches to voice priority.

💡

After inclusion HD-Calls have deteriorated communication quality (cliffs, noise), try to disable the function and use standard VoLTE.

Why? HD-The call may not work on Xiaomi.

Even if you have enabled the feature in your settings, it may not activate. Here are the main reasons and ways to eliminate them:

Especially often, problems arise with operators who formally support VoLTE, but have not optimized the network for the Internet. HD Voice. At the beginning of 2026, the situation is as follows:

• 🟢 MTS: Full support HD-Calls on most tariffs (except for Smartphones»).
• 🟢 Beeline: HD Voice is working, but may be turned off in roaming.
• 🟡 Megaphone: Supports, but only on tariffs with unlimited minutes.
• 🔴 Tele2: VoLTE is there, but HD Voice – only in test mode (not for all subscribers).
• 🟡 Yota: Depends on the region (in Moscow and St. Petersburg it works stably).

If you are connected to Megaphone or Telephone 2 and HD-Calls are not working, contact support and check if the service is activated for your number. Sometimes it needs to be connected separately (free of charge).

1) Your phone supports the function,

(2) Operator supports HD Voice in your area,

(3) The interviewee shall also use a compatible apparatus.

If at least one condition is not met, the call will be held in standard mode.-->

HD-Calls vs. third-party messengers: which is better?

Many users are wondering why they need it. HD Voice, if you have WhatsApp, Telegram or Viber? Indeed, instant messengers often provide higher sound quality through the use of the Internet and modern codecs (for example, Opus in Telegram). HD-Challenges have several key advantages:

• 📞 Phone number: Call goes to a standard number, no need to install apps.
• 🔋 Battery savings: HD-Calls consume less power than instant messengers (no background activity).
• 📶 Stability: Works even with a weak Internet (mainly coverage) 4G).
• 🚀 Fast connection: No delay to "connect via server».
• 💰 No restrictions: No Internet tariff (using voice minutes).

Where messengers win:

Conclusion: HD-Calls are ideal for regular phone calls, especially if you're calling city or mobile numbers, while messengers are better suited for international calls, video calls or group communication.

💡

If you frequently call abroad, set up VoWiFi (wi-fi calls) paired with HD Voice. This will save on roaming while maintaining high sound quality.

How to improve quality HD-call-ups on Xiaomi

Even if HD-So, the calls work, the sound quality can be made even better:

1. Update the firmware: In new versions MIUI They often improve sound processing. Check for updates in Settings → The phone. → Updating the system.
2. Use headphones: Connect wired or wireless headphones with support AAC or aptX, which will reduce microphone interference.
3. Turn off noise cancellation: In some Xiaomi models, the noise reduction function in calls can worsen sound. → Sound. → Sound quality in calls.
4. Activate. EVS-Codec: Newer models (e.g. Xiaomi 14) have codec available EVS (Enhanced Voice Services, which is even better AMR-WB. Included in the Engineering Menu (#4636##, section) IMS Service).
5. Check your network settings: Make sure that in Settings → SIM-map → Network type selected 4G (preferably 5G.

If the sound is bad after all the manipulations, try resetting the network settings:

→ SIM-maps and mobile networks → [your SIM] → Reset mobile network settings

This will help if the problem is related to incorrect parameters. APN or confluence.

⚠️ Note: Some Xiaomi models (e.g. Redmi Note 10 Pro) after being turned on HD-The Internet may disappear during a conversation. This is a firmware bug — try to roll back to an older version. MIUI or wait for the update.

FAQ: Frequent questions about HD-call-ups on Xiaomi