VoWiFi on Xiaomi: how to enable and why calls over Wi-Fi is better than usual

Have you ever lost connection in a subway, basement or country house where cellular network is not working well? With VoWiFi (Voice over Wi-Fi) technology, this problem is solved once and for all. Your Xiaomi smartphone — whether it is the flagship Xiaomi 14 Ultra model or the budget Redmi Note 12 — can make and receive calls over Wi-Fi even if the mobile signal is not completely available. But how does it work, and most importantly, how do you turn it on?

In this article, we will not only give you a step-by-step guide, but also take a look at the hidden nuances of why VoWiFi might not work at some of the tariffs, how to check your carrier’s support for the technology, and what to do if calls start to break once activated, and the unique 2026 compatibility table of Xiaomi models with VoWiFi that is not available on any other resource.

What is VoWiFi and why is it needed in Xiaomi?

VoWiFi (or Wi-Fi Calling) is a technology that allows voice calls and SMS to be sent over the Internet, rather than through traditional cellular networks, and the main advantage is stable communication where mobile signal is weak or absent: in the subway, outback, multi-storey buildings with thick walls.

This is especially true for Xiaomi owners because:

• 📶 Battery savings: phone doesn’t waste energy searching for cellular network in poor coverage.
• 💬 Unlimited calls: many operators (for example, MTS, Beeline, MegaFon) do not charge VoWiFi calls as part of a package of minutes.
• 🌍 Roaming without surcharges: in some countries VoWiFi allows you to call at home rate, avoiding roaming charges.
• 🔒 Security: Calls are encrypted by protocol IMS (IP Multimedia Subsystem, which is harder to listen to than regular GSM.

But there are pitfalls, too: not all Xiaomi models support VoWiFi, even among relatively new ones, and the technology only works with operators that have officially implemented it, such as MTS, Beeline, MegaFon and Tele2 in Russia, but with reservations: some regional affiliates may not provide the service.

Xiaomi smartphones support VoWiFi in 2026

The list of supported devices is constantly expanding, but there are key points:

• 📱 Flagships: all models of Xiaomi lines 12/13/14, Mi 11, Mix 4/Fold Supports VoWiFi out of the box".
• 💰 Mid-segment: Redmi Note 11/12 Pro, POCO F4/F5, Xiaomi Civi 2/3 — Usually on the list, but may require a firmware update.
• 🔴 Budget: Redmi 10A/12C, POCO M5 and cheaper – most often do not support VoWiFi due to hardware limitations.

To avoid guessing, check your model in our table:

⚠️ Note: Even if your model is on the supported list, VoWiFi may not work if you are not able to use it:

• 📱 Installed custom firmware (for example, LineageOS).
• 🌐 The phone is purchased for another region (for example, Xiaomi for China may not support VoWiFi in Russia).
• 🔄 The firmware is outdated (update to the latest version) MIUI through settings → The phone. → Updating the system).

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If you don't find your model in the table, check VoWiFi support through the engineering menu: dial ##4636## in the phone keyboard, select Phone Information, and find the line "VoWiFi provisioned." If there's "1" - the technology is supported.

Step-by-step: how to turn on VoWiFi on Xiaomi

The process of activating VoWiFi on most Xiaomi models is the same, but there are nuances depending on the version of MIUI.

1. Step. 1. Check the tariff to make sure your carrier supports VoWiFi and the service is connected to the tariff. For example, MTS has the option "Wi-Fi Calling", Beeline has "Calls over Wi-Fi." You can check in your personal account or by number: 📞 MTS: *111*469# 📞 Beeline: *110*180# 📞 MegaFon: *105*484#

Step 2. Update the firmware

Go to Settings → About Phone → Update system and install the latest version of MIUI. VoWiFi may not work on older builds!

Step 3: Activate VoWiFi in your settings

Open the Settings. → SIM-maps and mobile networks → [choose SIM] → Call over Wi-Fi and switch on the switch. If you don't have a point, your model doesn't support the function.

Step 4. Connect to Wi-Fi

VoWiFi only works when you're actively connected to a wireless network, so make sure that the Wi-Fi is on and the Internet is working.

Step 5. Make a test call

Call another number and check if the status bar shows a VoWiFi icon (usually a handset with a Wi-Fi symbol).

Tariff supports VoWiFi|Firmware MIUI updated|SIM-card activated|Wi-Fi is connected and working|In the settings there is a paragraph "Calls through Wi-Fi"-->

⚠️ Warning: If VoWiFi calls don’t go through after you turn on, try it:

1. Reboot the phone.
2. Manually select the operator’s network in Settings → SIM-cards → Network selection (sometimes the automatic mode is lost).
3. Shut down. VPN (Some services are blocked IMS-traffic).

What to do if VoWiFi does not work on Xiaomi

Even if you do everything according to the instructions, VoWiFi may not work.-5 causes and solutions:

If none of these methods worked, try resetting your network settings:

1. Go to Settings → Memory → Reset.
2. Select Network Reset (don’t reset all settings!).
3. After restarting, turn on VoWiFi again.

VoWiFi vs VoLTE: What’s the difference and what’s better

VoWiFi and VoLTE (Voice over LTE) are two different technologies with different advantages.

• 📶 VoLTE - Calls through 4G-network (clearer sound, faster connection, but requires coverage) LTE).
• 📶 VoWiFi – calls over Wi-Fi (works where there is no mobile network, but depends on the quality of the Internet).

On Xiaomi, both technologies can work simultaneously, for example, if you start a call over VoWiFi and then go out on the street where 4G appears, the call can automatically switch to VoLTE without a cliff (if the carrier supports eSRVCC - enhanced Single Radio Voice Call Continuity).

How to check what is included in your:

• 🔄 When you call, look at the network indicator: 📞 VoLTE: The icon is displayed HD or VoLTE near the signal level. 📞 VoWiFi: the icon of the tube with waves of Wi-Fi.

⚠️ Note: if you have a traffic saving mode in the settings SIM-Cards, VoLTE and VoWiFi can be turned off automatically. → SIM-map → [yours SIM] → Traffic saving regime.

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VoWiFi and VoLTE are not competing, but complementary. For maximum stability, it is recommended to include both technologies (if supported by your carrier and Xiaomi model).

Hidden VoWiFi settings: how to improve call quality

Few people know, but Xiaomi has hidden options that can affect the operation of VoWiFi. For example, you can manually set the priority of the network or turn off power saving to save your phone. IMS-service.

Here's what we can do:

1. Turn off battery optimization for Phone: Go to Settings → Applications → Application Management → Phone. Select Battery → Battery Optimization. Install No Limits.
2. Enable Forced VoWiFi mode (for power users): Adb shell settings put global wifi_calling_enabled 1 adb shell settings put global wifi_calling_mode 1 These commands include VoWiFi via ADB, Even if the item is not on the menu, be careful: wrong commands can disrupt the phone!
3. Reset IMS settings: Dial in the phone keyboard ##4636##. Select Phone Information. Press Reset IMS (if any).

💡 A useful tip: if you make frequent calls over VoWiFi, add frequently used numbers to your favorites. MIUI Optimize connection for "priority" contacts.

VoWiFi and roaming: how to call abroad without extra charge

One of the most useful features of VoWiFi is the ability to call at home rates while roaming, for example, if you are in Turkey but connected to local Wi-Fi, calls will be charged as intranet (if the operator supports this option).

How this works in practice:

• ✈️ Before traveling: Check with the operator whether VoWiFi is supported in roaming (MTS and Beeline - yes, MegaFon - partially). Make sure that there are enough funds for international calls (even if they are at home rate).
• 🌍 Abroad: Connect to stable Wi-Fi (at hotel, cafe, via local service) SIM-Turn off your mobile data to avoid roaming traffic. Make calls through the standard Phone app, they'll go over VoWiFi.

⚠️ Note: some countries (e.g. UAE, China) may block VoWiFi at the carrier level.

💡 Lifehack: If VoWiFi roaming doesn’t work, try using Google Fi (USA) or Airalo (Virtual) SIM-VoWiFi-enabled cards are often services that bypass local carrier restrictions.

FAQ: answers to frequent questions about VoWiFi on Xiaomi