How to turn VoWiFi on Xiaomi Redmi Note 8 Pro: Full Guide

Xiaomi’s current smartphones offer a wide range of communication capabilities, including Voice over WiFi, which can be a big deal for owners of the Redmi Note 8 Pro, and instead of losing communication in the basement, in a thick office, or out of town, it automatically switches voice traffic to an accessible wireless network.

However, standard MIUI shell settings don’t always provide direct access to control this protocol. Often users have to resort to hidden menus or special codes to activate the necessary options. In this article, we will discuss in detail all known ways to enable Vowifi on your device, minimizing risks and ensuring stable communication.

Before we get into technical manipulation, it's important to understand that the success of the operation depends not only on the settings of the phone, but also on the support of your mobile operator, and without the confirmation of the provider, even a perfectly configured smartphone will not be able to make calls through the Internet protocol.

What is VoWiFi and why does a Redmi owner need it?

Voice over WiFi technology allows voice calls to be transmitted over an internet connection using standards IP-For Redmi Note 8 Pro users, this means staying connected in places where cell towers are absent or extremely weak, and the sound quality often exceeds standard voice calls through the use of high-definition codecs.

The main advantage is that you can switch between networks automatically, and if you're in range of your home router, your phone uses Wi-Fi Calling, and when you leave your home, it will switch to LTE or 3G without interrupting the conversation, which is especially true for large buildings with screening structures.

It is important to note that the use of this feature is not separately charged by most operators, minutes are spent from your main package, as in a regular call, the only condition is the presence of an active Internet connection, the traffic of which is also not usually counted separately when calling through the native applications of the operator.

⚠️ Note: Make sure your plan supports Wi-Fi Calls.In some older plans, this option may not be available or require a separate connection via your personal account.

For Xiaomi owners, this feature also helps save battery power. In the conditions of poor signal, the smartphone constantly increases the power of the antenna to search the network, which quickly drains the battery.

Compatibility check between operator and region

The first step before any setup is to verify the support of your mobile operator. In Russia, major providers such as MTS, Beeline, Megafon and Tele2 have already implemented VoWiFi support for most subscribers.

Global versions of Global ROM firmware may have restrictions for certain regions, while Chinese versions (China ROM) often lack some carrier profiles from other countries, which may result in a menu item not appearing.

Check the relevance of yours. SIM-Older cards issued many years ago may not support the modern authentication protocols required to IMS (IP Multimedia Subsystem, which will require replacement SIM-cardboard.

  • 📱 Go to the Security or Settings app and check status SIM-map.
  • 🌐 Make sure that your local operator claims support for the technology.
  • 💳 If necessary, replace SIM-map 4G/LTE.
  • 📞 Call the operator support service to clarify the status of the service on your number.

If the operator confirms support, but the function does not work, the problem lies in the settings of the smartphone Redmi Note 8 Pro. Next we will consider the ways of forced activation.

Basic activation through the standard settings menu

In most cases, if the operator and firmware are compatible, the function should be available in the standard interface. The path to settings may vary slightly depending on the version of MIUI, but the logic remains the same. You will need to open the main menu of device settings.

Find the section that handles SIM cards and mobile networks. In newer versions of the shell, it's often called Settings. → SIM-Maps and mobile networks. Choose active networks. SIM-The card for which you plan to use calls over the Internet.

Inside the menu SIM-If you have a card, look for a switch called Wi-Fi Calling or Wi-Fi Calling. If you have one, just activate it. The system may request confirmation or suggest setting network priority.

→ SIM-maps and mobile networks → [Your SIM] → Wi-Fi calls

After turning on the status bar, next to the network indicator, a special phone icon with the Wi-Fi symbol may appear. This indicates the successful registration of the device in the operator's network via the Internet protocol.

☑️ Checking basic settings

Done: 0 / 1

If there is no menu item, it means that the operator profile is not automatically recognized, in which case you need to move to more advanced methods of setting up through the engineering menu.

Using an engineering menu to activate hidden functions

When the standard path is closed, the MIUI engineering menu comes to the rescue, a hidden section designed to test hardware, but allowing you to control hidden communication functions, and access it through a special code in the Phone application.

Dial the code ##86583##. In normal state, when you enter the last digit, you should see a pop-up notification "VoWiFi Carrier check was disabled" or "enabled." If the message reads "disabled", repeat the code entry until you receive an "enabled" confirmation.

After activating the operator check through the code, return to the standard settings. SIM-Now, there's supposed to be a previously hidden Vowifi switch, and this method works on most of the global firmware of the Redmi Note 8 Pro.

⚠️ Warning: Do not change other parameters in the engineering menu unless you are sure of their purpose. Incorrect changes can lead to loss of signal or incorrect operation of the radio module.

There is an alternative code for the extended menu: ##4636##. From the menu that opens, select Phone Information and scroll down to IMS Setup. Make sure Voice over WiFi ticks are active.

  • 🔢 Enter the code #86583## in the call.
  • ✅ The message says, “VoWiFi Carrier check was enabled».
  • 🔄 Reboot your smartphone to apply changes.
  • 📶 Check the appearance of the item on the menu SIM-map.

In some cases, you also need to activate the option via the code ##27663368378##, which directly turns on or off the VoWiFi functionality at the system level.

Setup via Xiaomi ADB/Fastboot Tools app

If the code combinations don’t work, you can use the software method through a computer, which requires the Xiaomi ADB/Fastboot Tools utility or the standard ADB. This method allows you to make changes to the system configuration files without obtaining root rights.

First, you need to activate USB debugging mode. Go to Settings → About Phone and quickly press 7 times on MIUI Version until you become a developer. Then, in advanced settings, turn on USB Debugging.

Connect the Redmi Note 8 Pro to the computer and run the command to change the global setting. vowifi_enabled. Change of meaning with 0 on 1 Enforced access to the function.

adb shell settings put global vowifi_enabled 1

Once you have completed the command, be sure to restart the device, a method that is considered more reliable because it directly edits the settings database, ignoring the regional firmware constraints.

What to do if your computer can’t see your phone?
Make sure drivers are installed ADB. Try another one. USB-Cable (preferably original) On your phone screen, select File Transfer mode and confirm debugging permission. ADB One mistake in the syntax of a command can lead to something that is not executed, but it usually does not harm the system. Table of codes and commands for different operators Different carriers may require specific settings or react differently to activation of the function. Below is a table with the main parameters and codes that can be useful when setting up Vowifi on the Redmi Note 8 Pro. Operator Activation Code Check Necessary profile Features MTS ##86583## mts_vowifi Often requires a reboot after Beeline is turned on ##27663368378## beeline_ims Automatically Update Megafon Profile ##4636## megafon_voice VoLTE must be enabled Tele2 ##86583## tele2_wifi It only works in the Yota home region ##4636## yota_ims This table is for reference, as operators regularly update their network hardware requirements. If one code doesn't work, try the alternative from the list. Note that it often requires simultaneous VoLTE (Voice over) activation to work properly. LTE). Without VoLTE running, the Wi-Fi Calling protocol may not be initialized because they share a common subsystem. IMS. Even with all the instructions, there can be situations where the function is not working properly. The most common problem is that the icon appears, but the calls fail or fail. This can indicate a protocol conflict or a weak Wi-Fi signal. Another common mistake is not having a VoWiFi icon in the status bar, so check if Do Not Disturb or On the Plane mode is activated with Wi-Fi enabled. Also try to switch network priority in call settings to Prefer Wi-Fi. If after the firmware update MIUI The function stopped working, maybe the new build contains errors, in which case it helps to clear the cache of the Phone and Settings application or wait for a patch from the manufacturer. ⚠️ Note: When using public Wi-Fi networks (cafes, airports), calls may not be available due to the blocking of ports by the network administrator. In such cases, use a mobile network. You can use system logs to diagnose problems, but this requires more knowledge. The simple solution is often a complete reset of network settings: Settings → Connection and sharing → Reset Wi-Fi, mobile networks and Bluetooth. 📉 Check the Wi-Fi signal strength (should be stable). 🔄 Reset network settings in the phone menu. 📞 Make sure that the service is activated on the operator side. 📱 Update the firmware to the latest available version. 💡If the VoWiFi icon appears and disappears, try turning off Wi-Fi Assistant or Mobile Data Switching in your Wi-Fi settings so your phone doesn’t try to change the connection type constantly. Vowifi's stability on the Redmi Note 8 Pro is directly dependent on software quality. Keep an eye out for system updates as Xiaomi regularly improves carrier compatibility. Frequently asked questions (FAQ) Does VoWiFi affect traffic consumption? No, the traffic used for voice calls over Wi-Fi is not usually charged or subtracted from the main Internet package. It goes through the operator's dedicated channels. However, video calls over Wi-Fi can consume traffic unless configured otherwise. Can VoWiFi be used in roaming? Yes, it's one of the best ways to save on roaming. If you're connected to Wi-Fi, calls to your home country's numbers are often charged like regular local calls or included in a package avoiding roaming rates. But check with your carrier. Why VoWiFi is Missing After Turning On 4G? Sometimes when activating functions IMS The phone can switch between network modes. Try manually setting your preferred network type in the Settings menu. → SIM-map → Network type on “Preferred” 4G (LTE)». Will this work on custom firmware? On custom firmware (LineageOS, Pixel Experience), the menu may differ, and the engineer's codes may not work, in which case activation is only possible through editing system files or using Magisk modules if the device is unlocked. Do I need VoLTE enabled to run VoWiFi? 90 percent of the time yes. Protocols are tightly connected, and operators require active VoLTE to authorize the device on the network. IMS, Which is required for Wi-Fi calls.