How to completely disable VoWiFi on Xiaomi Redmi: 5 proven ways

VoWiFi (Voice over Wi-Fi) on Xiaomi Redmi smartphones allows you to call over Wi-Fi when mobile communication is weak or absent. However, many users face problems: sudden call interruptions, deterioration of sound quality or conflicts with messengers. If you notice that after the update, MIUI VoWiFi activated automatically, it can be disabled in several ways.

In this article, we’ll look at all the available methods, from standard settings to hidden commands for the engineering menu. Note that some Redmi models (like the Redmi Note 10 Pro or Redmi 12) may have different interfaces, but the logic of action remains the same, and we’ll explain why VoWiFi sometimes turns on itself and how to prevent it.

What is VoWiFi and why it should be turned off

VoWiFi (or Wi-Fi Calling) uses Internet connectivity for voice calls instead of traditional mobile networks, which is useful in areas with poor coverage, but has drawbacks:

• 📉 Increased battery consumption – the smartphone constantly supports two connections (Wi-Fi) + cell-network).
• 🔊 Sound distortions – with weak Wi-Fi, the voice may be interrupted or sound robotically.
• 🚫 Conflicts with VPN — Some Enterprise Networks Block VoWiFi as Potential Vulnerability.
• 🔄 Automatic switching – the phone can connect to VoWiFi without notice, which is confusing.

On Xiaomi Redmi, the function is activated either manually through settings or automatically after updating MIUI. Operators (for example, MTS, Beeline, Tele2) can also force it to turn on for subscribers with support for the technology. If you are not using VoWiFi, it is better to turn it off to avoid unexpected problems.

Method 1: Disable VoWiFi via standard MIUI settings

The easiest method is to use the settings menu. It works on all Redmi models with MIUI 12 and later (including Redmi Note 11, Redmi 10C, Redmi K50, etc.).

1. Open the Settings app (cog icon).
2. Go to section. SIM-maps and mobile networks.
3. Choose yours. SIM-card (if two of them).
4. Find the call point over Wi-Fi or VoWiFi and move the slider to the off position.

If there is no Wi-Fi call, then your carrier is not supporting the technology, or it is disabled at the firmware level. In this case, try other methods from this article.

Make sure you have a stable mobile signal.

Close all active calls

Turn off the VPN (if used)

Reboot your smartphone after the changes-->

⚠️ Note: Some Xiaomi firmware (e.g. global version for Redmi) 9A) VoWiFi can be called Wi-Fi Calling or Internet Calling. If you don't find it, use the settings search (the magnifier icon at the top of the screen).

Method 2: USSD-codes to disable VoWiFi

If VoWiFi is not turned off via the menu, try special ones. USSD-They work independently of the version. MIUI, But depend on the operator. Below are the current codes for Russian providers:

To use the code:

1. Open the Phone app.
2. Go to the Set tab.
3. Enter the code for your operator and press the call button.
4. Wait. SMS-Disconnection notifications (coming within 5-10 minutes).

If an error occurs after you enter the code, it means that the service is not active on your number, or the operator has changed the command.

💡

If USSD-The code did not work, try to enter it through the SIM Services app (is available in the app). MIUI). Sometimes it helps to bypass the operator lock.

Method 3: Engineering menu (for power users)

If VoWiFi persists, you can use the Engineering Mode, which requires caution — wrong actions can disrupt network operation, and is suitable for Redmi models on Qualcomm processors (for example, Redmi Note 8 Pro, Redmi K40).

Instructions:

1. Open the Phone app.
2. Enter the code ##4636## and the Testing menu will open.
3. Select Phone Information (or Phone Information).
4. Scroll down to the VoLTE/VoWiFi block.
5. Click on VoWiFi and select Disable from the drop-down menu.
6. Reboot your smartphone.

Some firmware may not have VoWiFi, in which case try the alternative code:

##869434##

It opens an extended VoLTE menu, where there is sometimes a separate option for Wi-Fi calls.

⚠️ Warning: Changes to the engineering menu may cause a malfunction of the mobile network. If VoWiFi is lost after the VoWiFi shutdown, return the settings to the original state or reset the network to Settings. → SIM-map → Resetting network settings.

Method 4: Disconnection through the operator application

Some operators (such as MTS or Beeline) allow you to manage VoWiFi through their official applications. USSD-The codes don’t work or you don’t want to dig into your smartphone settings.

How to turn it off:

1. Download your operator’s app from the Play Market: 📱 My MTS - for MTS subscribers; 📱 My Beeline is for Beeline; 📱 MegaFon-Service - for MegaFon; 📱 My Tele2 is for Tele2.

Sign in to the app (you will need a phone number and SMS-code).

Services

My services.

Wi-Fi Calling

VoWiFi

Confirm the action by SMS (usually the code comes to the number).

The advantage of this method is that changes are applied at the operator level, so VoWiFi will not turn on itself after the smartphone update. However, note that the interface may differ in applications, and some operators (for example, Yota or Tinkoff Mobile) may not have VoWiFi control through the application.

Method 5: Reset network settings (extreme case)

If VoWiFi is turned on and doesn't turn off any of the ways I described above, resetting the network will help, a radical method that will bring all network parameters back to factory settings, including:

• 📶 Mobile Internet settings (APN);
• 🔄 Saved Wi-Fi networks and passwords;
• 📞 VoLTE and VoWiFi options;
• 🔌 Bluetooth settings.

How to perform the reset:

1. Open the Settings. → SIM-maps and mobile networks.
2. Click on the three dots in the top right corner and select Network Settings Reset.
3. Confirm the action (you will need to enter a pattern lock or PIN-code).
4. After restarting, reset the mobile network (APNs are usually automatically tightened).

⚠️ Warning: After resetting, all saved Wi-Fi passwords will be deleted – write them down in advance or back them up via Settings → Google → Backup.

💡

Network reset is the last option if other methods have failed. Before the procedure, check if the VoWiFi problem is due to a malfunction. SIM-Cards (try inserting them into another phone).

Why VoWiFi is turned on and how to prevent it

Many Xiaomi Redmi users complain that VoWiFi is activated without their knowledge.

1. Update MIUI – in new versions of firmware, the function can be enabled by default.
2. Operator – some providers (for example, MTS) force VoWiFi activation for subscribers with supported smartphones.
3. Resetting – After resetting to factory settings, VoWiFi can turn on automatically.
4. Application conflict – some instant messengers (such as WhatsApp or Viber) can indirectly affect call settings.

To prevent spontaneous inclusion:

• 🔧 Check your settings regularly after updates MIUI.
• 📵 Turn off automatic firmware updates in Settings → The phone. → Updating the system.
• 📞 Contact the operator and ask to turn off VoWiFi at the level SIM-map.
• 🔒 Set a password for settings SIM-Cards (some of them have this option).

If VoWiFi is turned on after each update, consider switching to custom firmware (like LineageOS), where it can be permanently disabled, but this requires unlocking the bootloader and may be unwarranted.

FAQ: Frequent questions about VoWiFi on Xiaomi Redmi