VoLTE on Xiaomi Redmi Note 8T: why you need, how to enable and solve connection problems

Why VoLTE is important for your Redmi Note 8T

If you own Xiaomi Redmi Note 8T and have not yet used VoLTE (Voice over LTE) technology, you miss a key advantage of modern networks: this feature allows you to call over the 4G Internet channel instead of the outdated 2G/3G, which gives crystal clear sound, instant connection and the ability to simultaneously talk and use mobile Internet. Without VoLTE, your smartphone jumps to slow networks when calling, and the speed of loading pages drops to zero.

But it's not that simple: even if your Redmi Note 8T supports VoLTE, the feature can be disabled by default or blocked by the operator. In this article, we'll discuss how to check for support, activate the technology in the settings, and what to do if VoLTE does not work despite the apparent compatibility, and also unique nuances for this model that are not mentioned in the standard instructions.

What is VoLTE and how is it better than regular calls?

VoLTE (Voice over LTE) — It's a voice technology that doesn't communicate your voice over traditional networks. 2G/3G, high-speed 4G-The main difference from the classic calls is that you don't switch between networks: you stay in the network. LTE While you are talking, the internet is still running at full speed.

For Xiaomi Redmi Note 8T this is especially true, as the model supports Band 20 (800 MHz) – a frequency that is actively used by Russian operators for VoLTE.

• 🎤 Sound quality: VoLTE uses codec AMR-WB, which transmits voices in the range up to 7 kHz (vs. 3.5 kHz in the 2G). The difference is heard even on cheap headphones.
• ⚡ Connection speed: the call is set in 1-2 seconds (versus 5-10 seconds per phone) 3G).
• 📶 Stability: in weak signal areas 4G VoLTE works better than the 3G, Because it uses more efficient coding.
• 🌐 Multitasking: You can talk and download files at the same time, watch YouTube or update maps.

But there is a flip side: if the carrier has not optimized VoLTE in your region, there may be delays (latency) or sudden cliffs, and VoLTE consumes slightly more battery than regular calls – about 5-10% per hour of conversation.

How to check if your Redmi Note 8T VoLTE supports

Not all versions of the Xiaomi Redmi Note 8T work equally well with VoLTE. For example, models for the European market (M1908C3XG) support out of the box technology, and some Asian versions require manual activation. To see if your device is compatible, follow the following steps:

1. Check model number: Go to Settings → About Phone → Model. If you see M1908C3XG, M1908C3XI or M1908C3YG, VoLTE is officially supported. How to find out the full model name?Dial ##4636#, then select Phone Information. The Model bar will have the exact code.
2. Make sure you have the latest firmware: VoLTE may not work on older versions of MIUI. Update system via Settings → About phone → System Update. Minimum stable version is MIUI 12.0.3 and higher.
3. Check the operator’s support: In Russia, VoLTE officially supports Beeline, MegaFon, MTS and Tele2, but the coverage varies by region.Clarify on the operator’s website or call in support (for example, VoLTE works only at tariffs with unlimited minutes).

⚠️ Note: If you are buying a Redmi Note 8T «In the grey way (e.g. from China), VoLTE can be blocked at the firmware level, in which case you will need to install a global or European version. MIUI.

Step-by-step: how to turn on VoLTE on Xiaomi Redmi Note 8T

If your smartphone and carrier support VoLTE, you can activate the function in 2 minutes.

1. Open the Settings. → SIM-maps and mobile networks.
2. Choose yours. SIM-card (if two of them).
3. Tap on the network type and install 4G (preferably).
4. Go back and find VoLTE (or 4G Calls) and switch the slider to the On position.
5. Restart your phone – this is a must for settings.

After rebooting, an icon should appear in the status bar next to the network indicator «HD» Or "VoLTE." If it's not there, check if it's inserted correctly. SIM-card (VoLTE only works in Slot 1!) and re-enable the function.

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If the VoLTE icon does not appear, try manually selecting the operator network: go to Settings → SIM-map → Select the network and turn off Automatic. Then select your carrier manually and restart the phone.

Frequent VoLTE issues on the Redmi Note 8T and how to fix them

Even if you set it up correctly, VoLTE may not work, and here are the typical reasons and ways to fix them:

• 🔄 VoLTE badge goes missing after bell: Guilty is bug in firmware MIUI 11-12.5 Solution: Update to MIUI 13+ or reset the network settings (Settings) → SIM-map → Resetting network settings).
• 📵 No sound when VoLTE calls: Check if ViLTE mode is activated - it can conflict with voice calls. Turn it off in Settings → SIM-map → Video calls.
• 🔋 Battery goes down quickly when VoLTE: This is normal, but if the discharge goes too fast, disable Constant Network Search in Settings → Battery → Performance mode.
• 🚫 Operator does not support VoLTE in your region: Check the coverage on the operator’s website or try using the app Jio4GVoice (He works with some Russian sims).

⚠️ Note: If after turning on VoLTE mobile Internet disappeared, check APN-MegaFon and Beeline require separate VoLTE settings APN-Profile. It can be downloaded automatically from the operator's website or manually entered into Settings. → SIM-map → Access points (APN).

If nothing helps, try resetting your network settings:

Settings → System → Additional → Resetting → Resetting Wi-Fi, mobile network and Bluetooth

VoLTE vs ViLTE vs VoWiFi: What’s the difference and what’s best for the Redmi Note 8T

In addition to VoLTE, two other voice technologies can be available in the Xiaomi Redmi Note 8T: ViLTE (video calls over 4G) and VoWiFi (wi-fi calls), let’s see how they differ and when to use them.

For most users, the Redmi Note 8T is the optimal VoLTE – it is versatile and stable. VoWiFi will come in handy in places with poor mobile signal (for example, in the subway or outside the city), and ViLTE – if you often need video calls without third-party applications (like WhatsApp).

To turn on VoWiFi:

1. Go to Settings. → SIM-maps and mobile networks.
2. Choose yours. SIM-map.
3. Activate the Wi-Fi Call Slider.
4. If necessary, enter the emergency address (e.g. 112).

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VoWiFi and VoLTE can be used simultaneously, and if the 4G network goes missing, the call will automatically switch to Wi-Fi (if it is on and available).

How to disable VoLTE if it interferes or is not necessary

Despite all the benefits, some users prefer to abandon VoLTE, and the reasons can vary from bugs with the connection to a desire to save battery power, to deactivate the function:

1. Open the Settings. → SIM-maps and mobile networks.
2. Choose yours. SIM-map.
3. Find the VoLTE (or 4G Calls) option and turn off the slider.
4. Reboot the phone.

After the VoLTE shutdown, calls will be made over 3G or 2G networks.

• 📞 The sound quality will deteriorate (especially in noisy places).
• 🌐 During the conversation, the mobile Internet is turned off.
• ⏱ The connection time will increase to 5-10 seconds.

⚠️ Warning: If you have disabled VoLTE due to connection issues, try updating your firmware or resetting your network settings first. 90% of the time, these are the ways that bugs are fixed.

FAQ: answers to frequent questions about VoLTE on Xiaomi Redmi Note 8T