Wi-Fi Calling on Xiaomi: How to Set Up in 5 Minutes and Forget About Bad Connections

Are you tired of calls dropping in the basement, elevator, or in the countryside where the mobile network is barely there? Wi-Fi Calling on smartphones Xiaomi (including Redmi And POCO) solves this problem, allowing internet calls even with zero cellular signal. But how do you set it up correctly if there's no obvious switch in the menu, and your carrier doesn't support the technology? In this article— Step-by-step instructions taking into account the features of MIUI 14/15, lists of compatible models and operators, as well as solutions to the 5 most common errors.

Wi-Fi Calling (or VoWiFi) is not just an alternative to instant messaging apps like WhatsApp or TelegramIt's a full-fledged replacement for cellular communications, where your phone number remains visible to the subscriber, and the sound quality is often superior to traditional calls. However, Xiaomi This feature may be hidden deep in the settings or absent entirely—it all depends on the model, firmware version, and carrier policy. Below, we'll discuss how to check for support, activate the feature, and what to do if it doesn't work.

What is Wi-Fi Calling and why is it needed on Xiaomi?

Wi-Fi Calling (or VoWiFi) is a technology that allows you to make voice calls and send text messages over the internet, rather than a cellular network. Its main advantage is stable connection in areas where mobile signal is weak or nonexistent—in the subway, basements, remote areas, and even abroad (if the operator supports roaming).

On smartphones Xiaomi the function works according to the standard IMS (IP Multimedia Subsystem), which is integrated into modern versions MIUIHowever, there are some nuances:

• 📱 Not all models support VoWiFi — even flagships older than 2019 may not have hardware support.
• 📡 The operator must support the technology - in Russia it is MTS, Beeline, Megaphone And Tele2, but with tariff restrictions.
• 🔄 Updated firmware required - on older versions MIUI (below 12) the function may be absent.

Compared to instant messengers (Viber, Skype), Wi-Fi Calling has a key advantage: calls are made from your main number, not through an app account. This means the caller will see your real number, not an "unknown" number or a messenger ID. Furthermore, VoWiFi supports emergency calls (112, 911), which is not the case with most VoIP services.

List of Xiaomi models with Wi-Fi Calling support

Not all smartphones Xiaomi Support VoWiFi—this depends on the processor, modem, and firmware version. Below is a table of current models (based on official data) Xiaomi (and user testing). If your model isn't on the list, it doesn't always mean it's not supported—sometimes the feature appears after an update. MIUI.

If your model is not in the table, please check support via Settings → About phone → MIUI versionIf the firmware version is lower MIUI 12.5, most likely VoWiFi is unavailable. You can also use the service Will My Phone Work (Enter model and operator to check compatibility).

⚠️ Attention: On some models (eg, Redmi 9 or POCO M3) Wi-Fi Calling may appear after updating to MIUI 14 Global, but it may be unstable. Before setting it up, check user reviews on forums (for example, 4PDA or XDA-Developers).

Step-by-step instructions: how to enable Wi-Fi Calling on Xiaomi

If your model supports VoWiFi, follow these instructions. The process may vary slightly depending on the version. MIUI, but the general scheme is the same.

Connect your phone to a stable Wi-Fi network

Make sure your SIM card is activated and supports VoWiFi.

Update MIUI to the latest version

Check your account balance (some operators block the function if your balance is negative) -->

Method 1: Via default settings (MIUI 12.5 and later)

1. Open Settings → SIM cards and mobile networks.

2. Select your SIM card (if you have more than one).

3. Tap on Wi-Fi Calling (or Calls via Wi-Fi).

4. Activate the switch and select the mode:

   • Wi-Fi only — calls only via the Internet.
   • Wi-Fi is preferred — priority is given to Wi-Fi, but if it is not available, the cellular network is used.
   • Cellular network is preferred — Wi-Fi Calling is enabled only when there is no signal.

Confirm activation (a reboot may be required).

Method 2: Through the engineering menu (for older models)

If there is no item in the settings Wi-Fi Calling, try turning it on through the engineering menu. This method works on Redmi Note 8 Pro, POCO X3 and other models with processors MediaTek:

1. Open the app Telephone and dial ##4636##.

2. Select Phone information → IMS settings.

3. Activate options:

   • VoWiFi — main switch.
   • Wi-Fi Calling - additional settings.
   • IMS over Wi-Fi — for stability.

Save the changes and restart your phone.

⚠️ Attention: On some firmware (MIUI EU (or custom ones) the engineering menu may be missing or have a different path. Do not change other parameters in this menu—this may cause communication problems!

How to check if Wi-Fi Calling is working on your Xiaomi

After setting it up, it's important to verify that the feature is actually active. Here are three ways to check:

1. Status bar indicator: An icon should appear next to the signal strength. Wi-Fi Calling (usually it's a tube with a Wi-Fi symbol or the inscription VoWiFi).

2. Test call: Turn off mobile data and cellular network (use Airplane mode with Wi-Fi enabled) and try making a call. If the call goes through, the feature is working.

3. Checking via USSD: Dial ##4636## → Phone information → view status VoWiFi (should be Registered).

If the icon does not appear, but calls go through, the operator may be using an alternative protocol (for example, MTS (VoWiFi sometimes disguises itself as standard calls.) To be sure, call another phone and check if your number is displayed (and not "unknown").

What should I do if the Wi-Fi Calling icon flashes or disappears?

This means the phone is trying to connect to the carrier's IMS server, but is having problems. Possible causes:

1. Slow Wi-Fi speed — VoWiFi requires at least 1 Mbps for stable operation.

2. Port blocking - some routers close UDP port 500 (necessary for IMS).

3. Problems with the operator - VoWiFi servers may be overloaded (relevant for Tele2).

Solution: Reconnect to a different Wi-Fi network or reboot your router.

Compatibility with Russian operators: MTS, Beeline, MegaFon, Tele2

Not all operators in Russia support Wi-Fi Calling, and those that do have restrictions based on their plans and regions. Below are the latest materials at the time of publication:

Operator	VoWiFi support	Requirements	Peculiarities
MTS	✅ Yes	Tariffs "Ultra", "Smart", "Tariff for our own", 4G/5G SIM card	Works in roaming (abroad)
Beeline	✅ Yes	Tariffs "All", "Unlimited", "My Beeline"	Requires activation via USSD: *110*180#
Megaphone	✅ Yes	All-inclusive, X, and Comfort rates	Does not work on SIM cards issued before 2020
Tele2	⚠️ Partially	Tariffs "My Tele2", "My Online"	Frequent disconnections, requires manual APN configuration
Yota	❌ No	—	Planned for 2026

If your carrier supports VoWiFi but the feature is not activated, follow these steps:

• 📞 Call support back and ask to activate the service (sometimes it is disabled by default).
• 🔄 Update your SIM card profile:
  • MTS: *111*1234#
  • Beeline: *110*180#
  • Megaphone: *505#
• 📱 Reset network settings V Settings → SIM cards → Reset mobile network settings.

⚠️ Attention: Some operators (for example, Tele2Wi-Fi Calling may be unstable due to infrastructure limitations. If calls are dropped every 10-20 seconds, try disabling the feature and using messaging apps.

Common problems and their solutions

Wi-Fi Calling on Xiaomi may experience errors even when configured correctly. Below is a list of the most common issues and how to fix them.

Problem 1: There is no "Wi-Fi Calling" option in the settings.

Reasons:

• Outdated version MIUI (below 12.5).
• The phone model does not support VoWiFi.
• The operator has not activated the service for your number.

Solutions:

• Update firmware via Settings → System Update.
• Check the model support on the website Xiaomi or forums.
• Call your operator and request VoWiFi activation.

Problem 2: Calls are dropped or not connected

Reasons:

• Low Wi-Fi speed (less than 1 Mbps).
• Traffic blocking by router or provider.
• Conflict with VPN or firewall.

Solutions:

• Connect to a different Wi-Fi network (such as a mobile hotspot).
• Disable VPN in Settings → VPN.
• Restart your router or change the Wi-Fi channel in its settings.

Problem 3: The VoWiFi icon flashes or disappears

This means the phone can't connect to the IMS servers. Try:

• Turn Airplane mode on and off.
• Restart your phone.
• Update APN settings (see operator instructions).

Wi-Fi Calling vs. VoLTE: What's the Difference and Which is Better?

Users often get confused Wi-Fi Calling And VoLTE (voice over 4G). While both technologies improve call quality, they work differently:

So which is better? Wi-Fi Calling It helps out where there is no cellular network, and VoLTE — where there is a stable 4G/5G connection. The ideal situation is when both functions are enabled simultaneously. Xiaomi it's done like this:

1. Activate VoLTE in Settings → SIM cards → Enable VoLTE.

2. Turn on Wi-Fi Calling (instructions above).

3. In the call settings, select Wi-Fi is preferred.

In this case, the phone will automatically switch between VoLTE and VoWiFi depending on the signal quality.

FAQ: Answers to Frequently Asked Questions

My Xiaomi doesn't support Wi-Fi Calling. Is there a way to fix this?

If your model is not included in list of supported, there are 3 options:

1. Update the firmware to the latest version MIUI (sometimes support appears after an update).
2. Install custom firmware (For example, LineageOS or Pixel Experience), but this requires unlocking the bootloader.
3. Use alternatives: messengers (WhatsApp, Viber) or applications like Google Voice.

⚠️ Please note that custom firmware may interfere with other functions (for example, NFC or camera).

Will Wi-Fi Calling work abroad?

Yes, but with some reservations:

• MTS And Megaphone support VoWiFi while roaming, but may incur additional charges.
• Beeline And Tele2 Usually the function is blocked abroad.
• Before your trip, check the conditions with your operator or temporarily activate roaming.

Check the settings: in Wi-Fi Calling the mode must be enabled Abroad (if there is one).

Can I use Wi-Fi Calling without a SIM card?

No. Wi-Fi Calling is tied to your SIM card and phone number. Without a physical SIM or eSIM, the feature won't work. An alternative is messaging apps (Telegram, Signal), which allow you to make calls over Wi-Fi without a SIM card, but linked to an account.

Why does Wi-Fi Calling consume so much battery?

VoWiFi typically uses no more power than standard calls. If your battery drains faster:

• Check if the feature is running in the background (disable it) Permanent connection in VoWiFi settings).
• Update firmware - in older versions MIUI There were bugs with energy consumption.
• Turn off VoWiFi if you don't use it constantly.

How to disable Wi-Fi Calling on Xiaomi?

To deactivate the feature:

1. Go to Settings → SIM cards and mobile networks.
2. Select your SIM card.
3. Turn off the switch Wi-Fi Calling.
4. Confirm shutdown (restart may be required).

If the item disappeared after disabling, reset the network settings (Settings → SIM cards → Reset mobile network settings).