How to disable VoLTE on Xiaomi Redmi 9T: all the ways and nuances

Xiaomi Redmi 9T is a popular budget smartphone with support for modern network technologies, including VoLTE (Voice over LTE), which allows you to call over a 4G network, improving the quality of communication, but sometimes users are faced with the need to turn it off, for example, due to connection problems, fast battery discharge or incompatibility with some carriers.

In this article, we will discuss all the available ways to disable VoLTE on Redmi 9T, from standard settings to hidden options of the engineering menu, and explain why the function may not work correctly and what alternatives exist. If you notice that after activating VoLTE, call quality deteriorated or other problems arose, this guide will help to return everything to its original state.

Before you start, make sure your smartphone is upgraded to the latest version of MIUI – this minimizes the risk of crashes. Also check if your carrier supports VoLTE: if not, you may not need to turn off the feature.

What is VoLTE and why turn it off on Redmi 9T

VoLTE (Voice over LTE) is a fourth-generation (4G) voice transmission technology that replaces traditional 2G/3G voice calls.

• 📞 Fast connection – calls connect almost instantly.
• 🔊 Better sound quality thanks to codec HD Voice.
• 📶 Parallel operation of the Internet – you can simultaneously talk and use mobile traffic.

However, the technology has shortcomings, because of which users of Xiaomi Redmi 9T decide to disable it:

• 🔋 Increased battery consumption – constant operation of the module 4G In VoLTE mode can reduce battery life.
• 📵 Connection problems – in some regions, operators are unstable in supporting VoLTE, leading to call interruptions.
• 📱 Incompatibility with some SIM-Cards – especially relevant for virtual operators or old tariffs.
• 🔄 Conflicts with other features, such as Wi-Fi Calling or Dual-SIM.

If you notice that after updating the firmware or changing the operator, calls began to be interrupted and the battery went down faster, the first thing you should try is to turn off VoLTE. In most cases, this solves the problem without additional manipulation.

⚠️ Note: On some Xiaomi firmware, disabling VoLTE can cause the smartphone to automatically switch to the phone. 3G When you call, if your operator doesn't support you. 3G (Tele2 in some regions, calls may stop working altogether.

Method 1: Disable VoLTE through standard settings

The easiest and safest method is to use the built-in MIUI settings, which are suitable for most users and do not require special knowledge.

1. Open the Settings app (the gear icon on the desktop).
2. Go to section. SIM-maps and mobile networks.
3. Choose yours. SIM-card (if two of them).
4. Tap on Network Type or Preferred Network Type (the name may vary depending on the version of MIUI).
5. In the menu that opens, uncheck the box from VoLTE or select the Only mode. 3G/Only 4G (free-to-play).
6. Save the changes and restart the smartphone.

After the reboot, check if the HD or VoLTE icon disappeared from the status bar during the call. If so, the function is disabled successfully.

Make a test call.

Make sure that the status bar does not have an “HD” or “VoLTE” icon.

Check if your phone switches to 3G during a call

Run the Internet speed test (VoLTE should not affect the speed) 4G)-->

If your MIUI version doesn’t have an explicit VoLTE switch, try an alternative path:

1. Go to Settings. → The phone.
2. Tap the MIUI version several times to activate the developer mode.
3. Return to the main settings menu and open Additional → for developers.
4. Find the VoLTE option and turn it off.

⚠️ Note: Some of the firmware Xiaomi Redmi 9T (Especially global) the VoLTE option may be hidden. If you don't find it in the standard settings, move on to the next way.

Method 2: Disconnect via the engineering menu (for experienced)

If VoLTE does not turn off through normal settings, you can use the Engineering Mode, which requires caution, as wrong actions can disrupt the network.

Instructions:

1. Open the Phone app and enter the combination: ##4636##.
2. You will be taken to the Testing menu. Select Phone Information (or Phone Information).
3. Scroll down to the Set preferred network type section.
4. Select LTE/TDD-LTE/CDMA/EvDo/GSM/WCDMA without mentioning VoLTE (exact text may vary).
5. Click Turn off VoLTE provisioning (if any).
6. Come back and restart your smartphone.

If the #4636### combination doesn’t work, try the alternative codes for Xiaomi:

• #86583## is a direct VoLTE engineering menu.
• ##4636## → Phone Information → VoLTE Provisioning.

Important: Some Redmi 9T firmware may have the engineering menu blocked, so if nothing happens after you enter the code, your carrier or MIUI version may be restricting access.

Method 3: Disabling VoLTE through third-party apps

If the standard methods didn't work, you can use specialized utilities, which allow you to manage network settings at a low level, but require root rights, or at least an unlocked bootloader.

1. 4G LTE Switch application

This application allows you to manually switch network types, including VoLTE.

1. Download 4G LTE Switch from Google Play.
2. Launch the utility and provide access to network settings.
3. In the main menu, select Disable VoLTE.
4. Confirm the action and restart the smartphone.

2. Network Signal Guru (requires root)

More advanced tool for deep network configuration:

1. Install Network Signal Guru and provide root access.
2. Go to the LTE Settings section.
3. Find the VoLTE Capability option and turn it off.
4. Save the settings and complete the rebut.

The advantage of these apps is that they give you more control over network settings than standard MIUI settings. However, beware: incorrect changes can lead to network loss.

⚠️ Note: Applications like Network Signal Guru may conflict with Xiaomi system services. If your mobile internet is lost after you use it, reset your network settings to Settings → SIM-maps and mobile networks → Resetting network settings.

Yeah, regularly.

I tried, but it didn't help.

No, I'm afraid to break my phone.

I didn't know there were.-->

Problems after VoLTE shutdown and their solutions

VoLTE shutdowns don't always go smoothly, but here are the most common problems and ways to fix them:

If after disabling VoLTE you are faced with the fact that the smartphone is not registered in the network, follow the following steps:

1. Reboot the phone.
2. Check if the Flight mode is on and turn it off again.
3. Remove and re-insert SIM-map.
4. Reset network settings in Settings → SIM-maps and mobile networks → Resetting network settings.

If nothing helps, return your VoLTE settings to their original state and contact your carrier’s support team – the problem may be on their side.

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Before resetting your network settings, manually save your APN settings (access points). To do this, take a picture of the screen with the settings or write them down in a notebook.

Alternatives to VoLTE: Wi-Fi Calling and other technologies

If you have disabled VoLTE due to poor communication quality, consider alternative technologies:

• 📶 Wi-Fi Calling - Wi-Fi calls if the mobile network is weak. → SIM-map → Wi-Fi Calling.
• 🔄 3G/4G with VoLTE disabled - classic mode, but without HD-sound.
• 📱 Messengers (WhatsApp, Telegram, Viber) – calls over the Internet, but require an installed application from the interlocutor.

Wi-Fi Calling is the best alternative to VoLTE for Redmi 9T if you have stable Wi-Fi at home or work.

• 🏠 It works even if there is no mobile signal.
• 🔋 Less battery load than VoLTE.
• 📞 The sound quality is often better than in the 3G.

To enable Wi-Fi Calling:

1. Open the Settings. → SIM-maps and mobile networks.
2. Choose yours. SIM-map.
3. Activate the Wi-Fi Calling switch.
4. If necessary, confirm the address for emergency calls (not always required).

⚠️ Note: Wi-Fi Calling is not supported by all operators, ask your provider if this feature is available on your tariff, for example, MTS and Beeline have it, but some virtual operators do not.

Frequent questions about VoLTE on Xiaomi Redmi 9T

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Disabling VoLTE on Xiaomi Redmi 9T doesn’t require root rights in most cases. Start with standard settings, and if it doesn’t help, use an engineering menu or third-party apps.